The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
The January 4 surface hoar, sun crust, facet interface will likely become a persistent weak layer in the weeks to come.  Recent strong winds have already created harder wind slabs at and above treeline on this layer.
A persistent weak layer down 50 to 70cm is reactive to skier triggering.  Our observations suggest the most reactive locations are steep S/SW facing slopes and open glades. Strong south winds may have created harder wind slabs at and above treeline.
A persistent weak layer down 50 to 70cm is reactive to skier triggering. Our observations suggest the most reactive locations are steep S/SW facing slopes and open glades. Strong south winds may have created harder wind slabs at and above treeline.
A cohesive slab overlies a persistent weak layer. Variable distribution and composition makes this layer difficult to predict. Tests on this layer indicate it is skier triggerable and observations indicate it is most reactive on steep S'ly aspects.
A cohesive slab overlies a persistent weak layer. Variable distribution and composition makes this layer difficult to predict. Tests on this layer indicate it is skier triggerable and observations indicate it is most reactive on steep S'ly aspects.
A cohesive slab overlies the January 4 persistent weak layer. Variable distribution and composition makes this layer difficult to predict.  It is most reactive on steep solar aspects.  There have been two skier triggered slides on this layer.
The January 4 crust-facet interface (down 60 cm) remains a concern.  It is most problematic on steep S and W aspects.  The slab above this is becoming more cohesive, and skier triggering remains likely.
The January 4 crust-facet interface (down 60 cm) remains a concern.? It is most problematic on steep S and W aspects.? The slab above this is becoming more cohesive, and skier triggering remains likely.
The January 4 crust-facet interface (down 60 cm) remains a concern. It is most problematic on steep S and W aspects. The slab above this is becoming more cohesive, and skier triggering remains likely.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects and produced several skier triggered avalanches last week. Human triggering is still possible, or windslabs may step down to this layer.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects and produced several skier triggered avalanches last week. Human triggering is still possible, or windslabs may step down to this layer.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects and produced several skier triggered avalanches last week. Human triggering is still possible.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects.
A weak layer down around 50 cm remains a concern. It has been most reactive to rider triggering on steep slopes where a sun crust is present.
A weak layer down around 65-90 cm might still be reactive to skier triggering. No natural avalanches have been observed on this layer recently. New snow overnight may overload this layer, causing it to fail with the additional weight of a rider.
A weak layer down around 80-100 cm might still be reactive to skier triggering. No natural avalanches have been observed on this layer recently. New snow overnight may overload this layer, causing it to fail with the additional weight of a rider.
2 layers, down ~40 and ~80cm, exist in isolated areas (see forecast details). They have been reactive to ski cutting on steep unsupported features in Rogers Pass, and in the surrounding region caused several human triggered size 2 avalanches.
A touchy surface hoar layer is down 25-40cm. There have been human triggered avalanches on this layer daily. Avalanches are increasingly possible with new snow and rising winds today adding load, and mild temperatures making the slab more cohesive.
A touchy surface hoar layer is down 35-55cm. Human (even tree bomb) triggered avalanches have occurred daily. Avalanches are increasingly possible with new snow and rising winds today adding load, and mild temperatures making the slab more cohesive.
A touchy surface hoar layer is down ~50cm. Human (even tree bomb) triggered avalanches have occurred daily. Avalanches are increasingly possible with new snow load and mild temperatures making the slab more cohesive.
The Feb 12 PWL is becoming more reactive as it matures.&nbsp; Skier triggered and natural avalanches have been increasing on this layer, with RB scores of 2, whole block.&nbsp; It is most reactive on solar aspects between 17-1900m.
A &quot;persistent weak layer&quot; (Feb 12 SH) is now down 50-60 cm from the surface, and is sporadically reactive to skier triggering.  Wide propagations are possible, especially on sunny aspects where it sits on a sun crust, between 17-1900m.
A &quot;persistent weak layer&quot; (Feb 12 SH) is down 50-60 cm from the surface, and remains sporadically reactive to skier triggering.  Wide propagations are possible, especially on sunny aspects where it sits on a sun crust, between 17-1900m.
A weak layer is down 40-50cm. It is most likely to be skier-triggered around 17-1900m, avoid open slopes and convex rolls. On sunny aspects the weak layer can be touchy.  Natural avalanche activity will increase on this layer today with the new snow.   
The surface hoar/crust layer from February is becoming less reactive; a function of it now being 1-1.5m deep and having avalanched in many areas. It is most likely to be triggered on solar aspects or by heavy triggers, resulting in large avalanches.
The surface hoar/crust layer from February is becoming less reactive; a function of it now being 1-1.5m deep and having avalanched in many areas. It is most likely to be triggered on solar aspects or by heavy triggers, resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered on solar aspects from shallow areas or from large triggers such as cornice falls resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered on solar aspects from shallow areas or from large triggers such as cornice falls resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
It will likely take a large trigger, like a cornice fall or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. If triggered, however, the resulting avalanche would be very large and destructive.
It will likely take a large trigger, like a cornice fall or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. If triggered, however, the resulting avalanche would be very large and destructive.
It will likely take a large trigger, like a cornice or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
Slopes receiving direct sun become more reactive during the day with warming. This is especially likely on steep solar aspects where buried crusts exist. Solar triggered avalanches are most likely around exposed rocks and may trigger deeper slabs.
Slopes receiving direct sun become more reactive during the day with warming. This is especially likely on steep solar aspects where buried crusts exist. Solar triggered avalanches are most likely around exposed rocks and may trigger deeper slabs.
PWL's are becoming stubborn, but should not be discounted.  Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist, but northerly aspects are not immune.
PWL's are becoming stubborn, but should not be discounted.  Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist, but northerly aspects are not immune.
Buried weak layers are stubborn to fail, but should not be discounted. Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist.
Buried weak layers are stubborn to fail, but should not be discounted. Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist.
Buried crusts and surface hoar layers in the upper meter of the snowpack may be reactive to a rider triggering from shallow areas where the snowpack is weak.
Buried crusts and surface hoar layers in the upper meter of the snowpack may be reactive to rider triggering from shallow areas where the snowpack is weak.
Weak shallow areas are most sensitive.  The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering. 
Weak shallow areas are most sensitive.  The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering.
Weak shallow areas are most sensitive. The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering.
Weak shallow areas are most sensitive. The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering.
Infrequent large avalanches have occurred on deeper instabilities. Shallow, rocky areas where the snowpack is thin and weak are most likely where they will be triggered.
Infrequent large avalanches have occurred on deeper instabilities. Shallow, rocky areas where the snowpack is thin and weak are most likely where they will be triggered.
A surface hoar layer buried down 50-110cm at the higher elevations is within the range of rider triggering.
A surface hoar layer down 60-120cm will have large consequences if triggered by a rider. Avoid shallow snowpack areas where triggering this layer is more likely.
A surface hoar layer down 60-110cm is in the range of rider triggering or can be triggered by the weight of smaller avalanches . Avoid shallow snowpack areas where triggering this layer is more likely.
The surface hoar buried earlier this month is slowly decomposing, but could be reawakened by surface slabs overloading it.
A variety of weak surfaces, including widespread surface hoar and sun crust on steep solar aspects, make this persistent slab tricky. It may be stubborn to trigger but recent avalanches on this layer have been large and propagated widely.
A layer of concern exists down 30-40 which consists of widespread surface hoar and sun crust on steep solar aspects. It may be stubborn to trigger but recent avalanches on this layer have been large and propagated widely.
A weak layer is buried down 30-40 cm. On steep solar aspects it will be marked by a sun crust. Large avalanches have occurred on this layer in the last week.
The surface hoar layer down 50-100cm remains a concern. Triggering this layer is most likely in and around shallow snowpack areas.
The surface hoar layer from mid November is buried down 60-110cm. Triggering this layer is most likely in and around shallow snowpack areas with large consequences.
The surface hoar layer from early November is buried 60-100cm below the surface. It is most likely triggered in shallow snowpack areas. If it does start to move, expect a large avalanche with nasty consequences.
The early November surface hoar still lingers near the base of the snowpack. It may be triggered from areas with a shallow snowpack. If it does trigger, it could bring a large slide with it.
A weak layer buried in early November is present at the bottom of the snowpack. If you are able to trigger the weak layer, a large consequence avalanche will result.
The storm has rapidly loaded slopes and may overwhelm persistent weak layers buried deeper in the snowpack. Very large avalanches will result if these layers are triggered.
Buried surface hoar down between 60-80cm with a recent significant snow load should remain a concern for rider triggering.
Buried surface hoar down between 80 to 110cm with a recent significant snow load should remain a concern for rider triggering. These layers may also be triggered by other avalanches, producing very large avalanches.
The recent snow has tightened up into a slab. It sits on various weak crystals, like facets or surface hoar, that may be triggered by skiers. If triggered, avalanches may step down to deeper surface hoar layers resulting in very large avalanches.
The recent snow has tightened into a slab. It sits on various weak crystals, like surface hoar and facets, that can be triggered by people. These avalanches may step down to deeper surface hoar layers, resulting in large avalanches.
A weak layer is buried down around 80 cm.&nbsp; If triggered, a large, high consequence avalanche will result. Carefully evaluate big terrain features by digging and testing adjacent, safe slopes.
A weak layer is buried down 60 to 90 cm. If triggered, a large high consequence avalanche will result. Carefully evaluate big terrain features by digging and testing adjacent, safe slopes.
2 weak layers exist in the snowpack, these are down between 70 and 110cm. They could become reactive with this additional snow load having very large consequences if triggered.
2 weak layers exist in the snowpack, these are getting deeper as snow amounts increase. They are down between 70 and 120cm and will have devastating consequences if triggered.
The interface between the December snow and the facetted November snow, down ~80cm is the biggest concern. Although this interface is becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Persistent weak layers down ~80cm (facets), and down ~115cm (surface hoar) continue to be reactive in specific locations. Although these interfaces are becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Persistent weak layers down ~80cm (facets), and down ~115cm (surface hoar) continue to be reactive in specific locations. Although these interfaces are becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Weak layers are buried down 80 to 100 cm. In a shallow snowpack where the weak layer is well-preserved, a skier could fail these layers.
The 2 buried weak layers down 70 to 110cm are still producing results in our snowpack tests. Caution around shallow snow pack areas where triggering these layers is most likely.
2 buried weak layers down 70 to 110cm remain a concern for riders. Consequences would be large if triggered which is more likely from shallow snowpack areas.
The presence of buried surface hoar remains a concern for backcountry riders. The potential for a large avalanche on this layer still exists.
The presence of a deep surface-hoar weakness remains a concern for backcountry travelers. It will likely take a large load to trigger it, like a cornice or someone who ate too many perogies over Christmas.
A deep persistent weakness lingers, down roughly 120cm. It will take a large trigger to initiate this layer, but if it starts to move, propagation would likely be wide and deep, creating a larger avalanche.
The heavy trigger may have arrived with this latest dump. Large avalanches are occurring, and may be stepping-down to this deeper layer.
Snowpack tests continue to show sudden planar results deeper in the snowpack (down 120cm). Caution is still needed when traveling into lee or cross-loaded features.
The persistent weak layers are now fairly deep in the snowpack. They will need either a sizeable trigger to propagate to them, or a person tromping around in a thin wind-affected area.
The persistent weak layers are now fairly deep in the snowpack. They will&nbsp; likely need a sizeable trigger, like an avalanche or a large chunk of cornice falling. They may be triggered from thin snowpack areas by a lighter trigger, like you.
The current rapid loading event could reawaken the deep slab that has been sleeping for the past week.
The November persistent weak layer is more likely to be triggered in times of heavy loading such as these with storm snow avalanches stepping down to this layer.
The November surface hoar layer can still be triggered by large triggers such as avalanches or cornice fall. There have been reports of backcountry operations seeing avalanches failing on this layer in the region.
The recent avalanche cycle showed the reactivity of the snowpack to rapid loading and its capability to produce large avalanches. Until the snowpack adjusts to the new load these layers may be reactive. Be cautious in areas that have not avalanched.
The recent avalanche cycle showed the reactivity of the snowpack to rapid loading and its capability to produce large avalanches. Likely triggers are cornices failing and other avalanches stepping down. Be cautious in areas that have not avalanched.
Be cautious in areas that have not avalanched. The recent avalanche cycle showed the reactivity of the snowpack to rapid loading and its capability to produce very large avalanches. Cornices could be the large trigger to break down to the deep layers
A weak layer buried down over 2 m will take a large trigger to fail. Limit your exposure to cornices.  A cornice fall to could be just the right trigger to fail this weak layer.
A weak layer buried down over 2 m will require a large trigger to fail.&nbsp; Limit your exposure to cornices.&nbsp; A cornice fall could be just the right trigger to fail this weak layer.
The November persistent weak layer will need a large load to be triggered. Its distribution is waning but still lingers in isolated spots.
The November persistent weak layer will need a large load to be triggered (i.e. cornice fall). Its distribution is waning but sill lingers in isolated spots.
The November persistent weak layer will need a large load, like a cornice, to be triggered. The isolated nature of its distribution makes it hard to forecast for this layer.
The November persistent weak layer will need a large load to trigger it, like a cornice. The isolated nature of its distribution makes it hard to forecast for this layer.
The November persistent weak layer will likely need a large load to trigger it, like a cornice. This is the classic low probability-high consequence problem. It's patchy distribution makes it hard to forecast, but if it wakes up watch out!
This layer has spotty distribution and will need a large load to trigger or can potentially be triggered from thin snowpack areas.
This layer has spotty distribution and will need a large load to trigger or can potentially be triggered from thin snowpack areas
This problem is becoming increasingly challenging. The clues of instability, like cracking and whumphing are tapering off, but tests and continued avalanches indicate that this thick slab is triggerable and will produce very large avalanches.
A strong slab overlies a very weak layer buried down 1-1.5m. The snowpack now demands your respect, if you trigger this layer a large, high consequence avalanche will result.&nbsp; Use caution in shallow snowpacks, where triggering is more likely.
A strong slab overlies a very weak layer buried down 1-1.5m. The snowpack now demands your respect, if you trigger this layer a large, high consequence avalanche will result.&nbsp; Use caution in shallow snowpacks, where triggering is more likely.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> </span><span class="s_E6FD2046">The slab overtop the weak layers down 1-1.5m continues to settle and become more cohesive. This problem will take a while to heal and requires good terrain management. Be particularly weary of open unsupported slopes and convex rolls below tree line.
The 1-1.5m slab over the weak layers continues to settle and become more cohesive. This problem will take a while to heal and requires good terrain management. Be wary of open, unsupported slopes and convex rolls, particularly at tree-line and below.
The 1-1.5m slab overlying the Feb 10th weak layer is slowly bonding to this interface, but is still reactive in tests. This problem requires good terrain management, such as avoiding large convexities and sticking to supported features.
A weak, persistent layer is buried under a thick slab. This layer is becoming more difficult to trigger, but if triggered will propagate widely producing a very large avalanche. Choosing appropriate terrain is key in managing this problem.
As this weak layer, buried down around 1 m, gains strength human triggered avalanches are still possible. Areas of concern are open, unsupported slopes, convex terrain and thin snowpack areas.
As this weak layer, buried down around 1 m, gains strength human triggered avalanches are still possible. Areas of concern are open, unsupported slopes, convex terrain and thin snowpack areas.
The sun crust/surface hoar layer down 1-1.5m is still producing hard sudden results in snowpack tests. This indicates that the layer is difficult to trigger but will propagate widely if it does.
The suncrust/surface hoar layer down 1-1.4m is still producing hard, sudden results in snowpack tests. This indicates it is stubborn to trigger, but if initiated, it will propagate widely, producing large avalanches.
Lingering deep (1-1.4m) in the snowpack, the surface hoar/facet/crust sandwich continues to produce hard, sudden results in tests. If a large enough trigger gets this layer to fail, avalanches will be very large.
The facet/crust &quot;sandwich&quot; is buried 120-150cm below the surface now. It is still producing hard, sudden results in tests, indicating that it can will propagate if a large enough trigger hits it. Avalanches digging into this layer will be large!
This last storm, and the forecast dump of snow this weekend, may wake a weak persistent layer up. This layer, buried ~1.5m deep, is still reactive in snowpack tests and if triggered will produce very large and destructive avalanches.
A deep weak layer buried at the end of January is down around 1.5 m. Although we have not observed any recent skier-triggering of this layer, artillery control triggered this layer on the west side of the park, releasing a size 3.5.
A deep weak layer buried at the end of January is down 1.8 to 2 m.&nbsp; Smaller avalanches could step down and trigger as large, high consequence avalanche on this layer.
A sun crust down ~1m is well within the range of human triggering on south and west aspects. The February surface hoar/crust layer down ~1.5-2m which can reawaken with a heavy trigger such as a large cornice release.
2 buried weak layers have been reactive this week. Down ~1m, is a sun crust on south and west aspects. The other is the other is Feb. surface hoar/crust layer down ~1.5m-2m which still shows wide propagation potential in snowpack tests.
There are two layers of concern. The first is a sun crust on S-SW slopes, buried ~1m deep. The second is the Feb 10 surface hoar/facet complex, down 1.5-2m. Both exhibit sudden failures, meaning there is potential for wide propagation.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The Mar 2 and Feb 10 layers are buried 1m and 1.5-2m respectively. Test results are still exhibiting sudden planar results in the hard range, meaning a deep slab could </span><a href="https://www.facebook.com/photo.php?v=637161176333875" target="_blank"><span class="s_9255B882">propagate widely.</span></a><span class="s_AA239A9B">
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">We are expecting over 50cm of snow this weekend, with strong westerly winds. This will rapidly load the persistent weak layer down 1.5-2m. This layer continues to be </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://avalancheinfo.net/Images/BLong-8436.jpg" target="_blank"><span class="s_9255B882">reactive and surprise people</span></a><span class="s_AA239A9B"> throughout the region, producing impressive avalanches.
This sudden heavy snow load is likely to reawaken the deeper persistent weak layers creating very large avalanches. Avoid crossing avalanche paths until the storm ends and temperatures cool down.
Down around 1-1.25m is a buried crust from early March. Backcountry users have been reporting whoomphs and remotely triggering this layer prior to this latest storm. Extra caution on steep south and west slopes where the crust was well formed.
A weak layer from early March within the range of rider triggering may catch you by surprise. Triggering this layer is more likely on steep south and west aspects where the crust had a chance to fully form.
The early March crusts are buried by over a metre of snow, but are still triggerable by people. They are more likely to fail on steeper S and W aspects.
This layer is patchy which makes it difficult to predict. It is likely to be most reactive on solar aspects where it is comprised of a sun crust with surface hoar. If triggered it has properties and is deep enough to result in a large avalanche.
This layer is deep enough to cause a large avalanche and shallow enough to be triggered by people, a dangerous combination. It's been most reactive on solar aspects where the crust is thickest and most likely to be triggered from shallow snow areas.
Reports of whoomphing and natural activity observed on this layer yesterday indicate it's volatility. This layer is deep enough to cause a large avalanche and shallow enough to be human triggered, a dangerous combination.
The Mar 2nd crust is dwn around 1.25m. The slab overtop the weak layers down 1-1.5m continues to settle and become more cohesive.
Snowpack tests yesterday show the Mar 2 layer down ~1m to still be reactive with large consequences if triggered. Shallow snowpack areas, like slopes that have lots of rocks poking out, seem to be the most likely areas for this to happen.
The early March weak layer down ~1m is reactive in snowpack tests with hard sudden results. We still see sporadic large avalanche events that fail on this layer. Choose supported slopes that have uniform snow cover.
The early March weak layer is still reactive with hard, sudden planar results in tests. Sporadic large avalanche events are still occurring on this layer, so heads-up with the new loading overnight. Stick to supported features today.
Weak layers from early March, now buried a meter deep, are still reactive in tests. They are most likely to be triggered on solar aspects where sun crusts exist. Smaller avalanches may step down to these layers, resulting in a big avalanche.
Weak layers from early March, now buried a meter deep, are still reactive in tests. They are most likely to be triggered on solar aspects where sun crusts exist. Smaller avalanches may step down to these layers, resulting in a big avalanche.
A weak layer down 20-30 cm is still reactive to skier-triggering. Use caution on unsupported features and convex terrain. Watch for changing conditions as temperatures warm up today and surface crusts deteriorate.
more reactive on solar aspects.
Many weak layers are buried within the snowpack in the upper 2m. These are all deep enough to cause large avalanches that will inflict significant damage. Shallow areas and day time warming are most likely to trigger them.
The sun will get deep into the snowpack today and could reawaken one of the many buried weak layers. Avoid slopes where rocks are evident on the surface as they are likely to attract more heat to trigger those layers.
There are numerous sliding layers buried in the upper 1-1.5m of the snowpack. If we see any strong sunshine today, there could be avalanches stepping down to these layers.
The upper 1-1.5m of the snowpack has numerous sun and temperature crusts within it. These may become sliding layers with day-time warming and the possibility of a strong April sun popping onto the slopes.
Be aware that small avalanches have the ability to trigger larger step down avalanches.
Many crusts on solar aspects are buried within the 1m range. At this depth they can be triggered by humans. Avoid shallow snowpack areas where it is most likely to initiate an avalanche on this layer.
The upper snowpack consists of many buried crusts on solar aspects. Triggering these layers is most likely from slopes where the snowpack is shallow and/or if there is strong solar radiation even if this is for brief moments.
The deeper instabilities that exist in our snowpack can reawaken with the increase in temperatures or added weight of snow/rain. Avoid those shallow snowpack areas where triggering these layers is most likely.
We may see the deeper instabilities reawaken with the warm temperatures, and possibly rain, moving into the snowpack. Try to avoid shallow, thin areas where a person could trigger a deeper weakness.
Be aware that step down avalanches are possible if storm slabs or wind slabs are triggered in wind loaded areas.
The large size 3.5 from Moccasin Flats 36 hours ago shows the persistent slabs have not gone away. Larger triggers, like cornices or surface avalanches, may step down to deeper layers.
Without a good refreeze, there is less structure to the snowpack to prevent it from stepping down into the lower persistent weaknesses. The large size 3.5 from Moccasin Flats 2 days ago illustrates the potential destructive force lingering out there.
Weak layers buried deeply in the snowpack are still releasing naturally and producing avalanches up to size 3.5.  Warm temperatures and solar inputs elevate this hazard. Large, heavy triggers like cornice falls could trigger a large avalanche.
The Mar 2nd crust and Feb 10 layer can be triggered by heavy loads such as cornices or loose wet slides, a likely scenario with the forecast strong solar inputs.
The Feb 10 layer is the monster that can be triggered by heavy loads. It is still a 3-5cm thick sandwich complex layer of SH, FC and crusts.
Deeper persistent layers will require a large trigger to initiate, or a couple of people hitting a thin, weak spot in the snowpack.&nbsp;
2 weak layers within our snowpack, down ~1m and ~1.2m that are producing tests results to be concerned about. Whoomphing and cracking may not be as prevalent due to the depth of the layer but if triggered the slab is likely to propagate.
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. As temperatures rise the likelihood of triggering will increase and they are capable of producing very large avalanches. Be especially cautious on planar open slopes.&nbsp; </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. They are capable of producing very large avalanches and may be triggered by skiers. As temperatures warm over the next few days the likelihood of triggering will increase.
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. They are capable of producing very large avalanches and may be triggered by skiers. Trigger points include steep alpine terrain, thin areas, and unsupported open slopes.
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. They are capable of producing very large avalanches and may be triggered by skiers. Trigger points include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.&nbsp; Once initiated avalanches triggered in the storm snow may step down to the deep persistent weak layers.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Persistent weak layers that were very reactive earlier this season are expected to wake up again with the rapid loading that is occurring. These layers are capable of wide propagations and producing very large and destructive avalanches.
Persistent weak layers that were very reactive earlier this season are expected to wake up again with the rapid loading that is occurring. These layers are capable of wide propagations and producing very large and destructive avalanches.
Continued warm temperatures and rain at lower elevations are ideal to wake up buried persistent weak layers capable of wide propagations and producing very large and destructive avalanches.
Big triggers like a cornice fall is capable of initiating this layer which would produce a very large avalanche as it would encompass the entire snowpack. Watch your exposure to overhead hazard like cornices when the sun comes out.
This layer is still failing with big triggers. A cornice fall in steep terrain is capable of triggering this instability and causing a large avalanche. Watch your exposure to overhead hazard like cornices.
There is a weakness at the bottom of the snowpack in some areas throughout the Park from the November crust.  Although it is difficult to trigger it should not be discounted. Large loads, like a cornice fall or triggering from a thin spot might do it
Weakness at the bottom of the snowpack in some areas throughout the Park from the November crust.&nbsp; Thin snowpack areas on a large alpine slopes are most suspect to release this layer. It is difficult to trigger but will have large consequences.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
Rider triggered and remote avalanches are happening daily on a widespread surface hoar layer down ~50cm. The overlying slab has gained enough strength to propagate widely which means bigger consequences. This problem will persist for a while.
A touchy surface hoar layer continues to be reactive. Avalanches continue to be triggered, even in areas that have been heavily traveled. Some areas offer no clues of instability, but the potential for large avalanches exist.
A touchy surface hoar layer continues to be reactive. Avalanches continue to be triggered, even in areas that have been heavily traveled. Some areas offer no clues of instability, but the potential for large avalanches exist.
The December 17th surface hoar layer is still reactive.  Avalanches continue to be triggered even in locations previously skied. Some areas offer few clues of the instability but the potential for large avalanches continues.
The December 17th surface hoar layer is still reactive. Avalanches continue to be triggered even in locations previously skied. Some areas offer few clues of the instability but the potential for large avalanches continues.
The Dec17th surface hoar is still reactive, with most events at treeline. A size 2 skier-controlled avalanche released on this layer yesterday. Buried surface hoar requires careful decision making, especially as more new snow continues to fall.
The Dec17th surface hoar is still reactive, particularly at treeline. As new snow continues to fall the consequences of an avalanche on this layer increase, careful decision making is still necessary.
The Dec17 surface hoar is most reactive at treeline. As snow load continues the consequences of an avalanche on this layer increase, careful decision making is still necessary. We suspect yesterdays Teddy Bear Trees avalanche to be on this layer.
The December 17th surface hoar layer is still a real concern in the snowpack.  The significant storm snow load should be increasing the probability of triggering this deeper weak layer.  This layer is most prevalent at treeline elevations.
The December 17th layer produced our larger controlled slides yesterday.  Slides initiating in the storm snow have a good probability of overloading this layer as they gain volume.  This layer is most prevalent at treeline elevations.
The Dec 17 instability is still active. Yesterday a field team triggered a sz 1.5 on a convex roll at treeline that had previously released and since reloaded. This layer is widespread at treeline and should not be forgotten during decision making.
The Dec 17 instability is still active and can be triggered by human loads on convex rolls and steep terrain. The surface hoar sits on a thick crust, providing a bed surface for larger avalanches. This layer is widespread at treeline.
The Dec 17 instability is still active and can be triggered by snow riders on convex rolls and steep terrain. The surface hoar sits on a thick crust, providing a bed surface for larger avalanches. This layer is widespread at treeline.
The Dec 17 instability remains our primary concern. This layer is still active and can be triggered by snow riders in areas where it has not previously avalanche. Likelihood of triggering has decreased but propagation and consequences have increased.
The Dec 17 surface hoar is still a major concern. It has become spotty, but is still reactive in areas where it has not already avalanched. This makes it harder to predict but it is possible to trigger large avalanches where it exists.
The Dec 17 surface hoar is still a major concern. It has become spotty, but is still reactive in areas where it has not already avalanched. This makes it harder to predict but it is possible to trigger large avalanches where it exists.
The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The December 17th could still be reactive in locations where it has yet to avalanche.
The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The surface hoar sits on a thick crust complex which provides a firm failure plane for avalanches.
The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The surface hoar sits on a thick crust complex which provides a firm failure plane for avalanches.
The December 17th surface hoar layer is still a factor to consider in our snowpack. This layer is widespread at treeline, more spotty at alpine elevations and sits on a thick crust complex which provides a firm failure plane for avalanches.
The new snow load or shallower avalanches could reawaken the Dec 17 surface hoar layer down 90-130cm. This layer is widespread at treeline, more spotty at alpine elevations and sits on a thick crust complex.
The December 17 layer may reawaken after being overloaded by slides initiating on the January 15 surface hoar layer. This layer is widespread at treeline and spotty at alpine elevations.
A 60cm+ thick cohesive slab now overlies a very touchy surface hoar layer. Tests indicate that it is likely to propagate if triggered, and avalanches have been remotely triggered from up to 300m away.
A 60cm+ thick cohesive slab now overlies a touchy surface hoar layer. Tests indicate that it may be triggered by light loads (ie you) and likely to propagate widely as the slab stiffens. Avalanches have been remotely triggered from up to 300m away.
A 60cm+ thick cohesive slab now overlies a touchy surface hoar layer. Tests indicate that it may be triggered by human loads and likely to propagate widely as the slab stiffens. Avalanches have been remotely triggered from up to 300m away.
Although this surface hoar layer is now buried 70-100cm deep, it will be easily triggered today with addition of the new snow load. Stability tests show that this layer has good propagation potential, making large avalanches likely.
Mid January surface hoar layer is now buried 60-100cm deep. This layer is likely to become more reactive with the current warm conditions and rain we are receiving. 
Mid January surface hoar layer is now buried 60-100cm deep. This layer is becoming more reactive with the current warm conditions and rain we are receiving.
Natural and artillery triggered avalanches continue to fail on the Jan.15 surface hoar layer, now buried 60-100cm deep. This layer continues to propagate widely into very large avalanches. Avalanches may step down to a deeper layer from mid Dec.
Recent avalanches have been failing on the Jan.15 surface hoar layer, now buried 60-100cm deep. Some avalanches have stepped down to a deeper layer from mid Dec.
Jan 15 surface hoar layer is buried 60-100cm deep. This interface remains reactive due to large, poorly bonded surface hoar crystals.  Avalanches from large triggers such as cornice fall might step down to a deeper layer from Dec 17.
Jan 15 layer is buried 60-100cm deep. This layer remains a concern due to large, poorly bonded surface hoar crystals.  As snow continues to settle, this layer will require larger triggers to initiate. Cornice failures could step down to deep layers.
Jan 15 layer is buried 60-100cm deep. This layer remains a concern due to surface hoar crystals. As snow continues to settle, this layer will require larger triggers to initiate. This layer could be triggered by heavy loads or from shallow areas.
The mid January surface hoar layer is buried 60-100cm deep.&nbsp; Getting this layer to fail will be difficult but triggering it from shallow areas or from heavy loads such as a cornice fall remains possible.
The mid January surface hoar layer is buried 60-100cm deep. Getting this layer to fail will be difficult but triggering it from shallow areas or from heavy loads such as a cornice fall remains possible.
The January 15 surface hoar layer is down 70-110cm.  Large triggers will be required to wake this layer however it remains possible in shallow snowpack areas or from cornice fall.
The January 15 surface hoar layer is down 70-110cm. Large triggers, like a cornice fall or other avalanches, are likely required to trigger this layer. Rapid loading forecast by Friday may reactivate this layer.
The January 15 surface hoar layer buried down 70-110cm is still reactive in many areas. Rapid loading over the next few days may overload it, or storm slab avalanches may step down to this layer.
Rapid loading and warm temperatures are the types of conditions that can re-awaken buried weak layers. Storm slab avalanches may step down to these  layer as well.
Recent intense precipitation and warm temperatures have the ability to reawaken deeper layers. Storm slabs avalanches may step down and propagate on these deep instabilities.
Recent intense precipitation and warm temperatures have the ability to reawaken deeper layers. Storm slabs avalanches may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be discounted just yet. Storm slabs avalanches may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten. They continue to be reactive, and produce very large avalanches. Storm slabs avalanches may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten. They continue to be reactive, and produce very large avalanches. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten, especially while temperatures remain warm. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten, especially while temperatures remain warm. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten, especially while temperatures remain warm. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
We have persistent weak layers down between ~1 to 1.5m. Large triggers such as a cornice failure or triggering from shallow areas may release avalanches these layers.
We have persistent weak layers down between ~1 to 1.5m. A large load such as a cornice failure will be needed to trigger these layers. Alternatively humans may be able to trigger them from shallow areas.
We have persistent weak layers down between ~1 to 1.5m. A large load such as a cornice failure will be needed to trigger these layers. Alternatively humans may be able to trigger them from shallow areas.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. If triggered these layers continue to propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers continue to propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers continue to propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers may propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers may propagate widely.
Persistent weak layers down 1 to 1.5m will need a large load such as a cornice failure to be triggered. A light load may be able to trigger them from shallow areas. Heads up when traveling on slopes that could be affected by weakening cornices.
Deep persistent weak layers will need a large load such as a cornice fall or another avalanche to be triggered. A light load may be able to trigger them from shallow areas. Heads up when traveling on slopes threatened by cornices above.
There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail. Strong solar radiation or a large cornice failure are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail.  Strong solar radiation or a large cornice failure are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail. Strong solar radiation or a large cornice failure are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but&nbsp; may result in large avalanches if they do fail. Strong solar radiation or a large cornice failures are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but may result in large avalanches if they do fail. Strong solar radiation or a large cornice failures are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but may result in large avalanches if they do fail. Strong solar radiation or a large cornice failures are possible triggers.
There are a number of weak layers in the snowpack that are hard to trigger but could result in large avalanches if they fail. Large cornice fall or prolonged strong solar radiation are possible triggers.
Deep instabilities in the snowpack have been dormant in recent weeks but may become reactive. The bridging properties of near surface crusts weaken as the snowpack warms. New snow tonight will make persistent slabs a key problem for the weekend.
Deep instabilities in the snowpack have been dormant in recent weeks but may become reactive. The bridging properties of near surface crusts weaken as the snowpack warms. New snow today will make persistent slabs a key problem.
A multitude of crusts are buried within the top meter of the snowpack. These may become reactive with the new load we received or with solar radiation. The bridging properties of near surface crusts weaken as the snowpack warms.
A multitude of crusts are buried within the top meter of the snowpack. These have may become reactive with the new load we received and with solar radiation. The bridging properties of near surface crusts weaken as the snowpack warms.
A multitude of crusts and a surface hoar layer are buried within the top meter of the snowpack. These may become reactive with solar radiation as the bridging properties of near surface crusts weaken as the snowpack warms.
The upper snowpack is complex, with a multitude of crusts, weak facetted layers, and surface hoar. Solar radiation weakens surface crusts and may make these layers in the top 60cm more reactive. Large slab avalanches have occurred on these layers.
The upper snowpack is complex, with a multitude of crusts, weak facetted layers, and surface hoar. Large slab avalanches continue to sporadically occur on these layers. Cornices are large and fragile and if they fail provide a large trigger.
The upper snowpack is complex, with a multitude of crusts, weak facetted layers, and surface hoar. Large slab avalanches continue to sporadically occur on these layers. Cornices are large and fragile and if they fail provide a large trigger.
The upper snowpack is complex with a multitude of crusts, weak facetted layers, and surface hoar. Large slab avalanches continue to sporadically occur on these layers. Cornices are large and fragile and if they fail provide a large trigger.
The upper snowpack is complex with a multitude of crusts, weak facetted layers, and surface hoar. There have been reports of skier triggered slab avalanches failing down 30-60cm on these crusts from neighboring areas.
The upper snowpack is complex with a multitude of crusts, weak facetted layers, and surface hoar. There have been reports of skier triggered slab avalanches failing down 30-60cm on these crusts from neighboring areas.
Persistent weak layers down 50-100cm have been triggered recently by light loads, such as skiers or sluffing off of cliffs. These layers have been remotely triggered, and have the tendency to propagate widely.
Persistent weak layers down 50-100cm have been triggered recently by light loads, such as skiers or sluffing off of cliffs. These layers have been remotely triggered, and have the tendency to propagate widely.
Persistent weak layers down 50-100cm have been triggered recently by light loads such as skiers and sluffing from steep terrain.  These layers have been remotely triggered and are prone to propagate widely.
Layers down 50-100cm have been triggered recently by light loads such as skiers and sluffing from steep terrain. Remote triggering and wide propagations are possible. Cornice failures from warm daytime temperatures could trigger these layers.
Layers down 40-100cm have been triggered naturally and by light loads such as skiers and sluffing from steep terrain. Remote triggering and wide propagations are possible. Cornice failures from warm daytime temperatures could trigger these layers.
Recent and forecast precipitation could be enough to overload instabilities within our snowpack. A number of weak layers reside in the top 1.5m and were triggered by people in the backcountry last week.
Recent and forecast precipitation should be enough to overload instabilities within our snowpack. A number of weak layers reside in the top 1.5m and were triggerable by people in the back country last week even without this new load.
Continued warm precipitation has been enough to begin to overload the various persistent instabilities in our snowpack. A series of weak layers in the top 1.5m of snowpack should be considered triggerable by back country riders.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
Multiple weak layers in the top 1.0 m of the snowpack. These layers may become more reactive as the snowpack warms with daytime heat and weakens them. Large triggers like cornice falls may also do the trick.
Multiple weak layers in the top 1.0 m of the snowpack. These layers may become more reactive as the snowpack warms with daytime heat and weakens them. Large triggers like cornice falls may also do the trick.
Multiple weak layers in the top 1.0 m of the snowpack. These layers may become more reactive as the snowpack warms with daytime heat and weakens them. Large triggers like cornice falls may also cause avalanches to fail on these layers.
Weak layers in the top meter of the snowpack may become more reactive as the snowpack warms with daytime heat. Large triggers like cornice falls may also cause avalanches to fail on these layers.
Weak layers in the top meter of the snowpack may become more reactive as the snowpack warms with daytime heat. Cornice falls are the most likely triggers of large deep avalanches failing on these layers.
A weak layer down 65 cm was producing easy sudden shears yesterday, failing on 4F snow between a crust and a more dense layer.  Whumphing and cracking was observed and was suspected to be caused by failure at this layer. 
A 70-90cm slab sits on a suncrust on steep solar aspects and preserved surface hoar at and below treeline. This slab is well formed in areas influenced by strong winds. This layer is becoming less reactive in tests, but remains triggerable by skiers.
80-100cm of storm slab sits on top of the Dec 2 persistent weak layer. This layer is in the form of surface hoar at and below treeline and suncrust on solar aspects in the alpine. The layer is producing hard results on field tests yesterday at 2100m.
80-100cm of  settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and suncrust on solar aspects treeline to alpine. The layer is producing moderate-hard results on field tests yesterday at 2000m.
80-100cm of settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
80-100cm of settled snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
Varying depths of settled snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
80cm of snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and sun crust on solar aspects. Although this layer is becoming less reactive, it is still producing sudden results in stability tests.
80cm of snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and sun crust on solar aspects. Although this layer is becoming less reactive, it may awaken with ongoing incremental snow loading.
80cm+ of settled snow sits on top of the Dec 2nd interface.  This interface consists of surface hoar at and below treeline and suncrust on steeper solar aspects in the alpine.
80cm+ settled snow sits on top of the Dec 2nd interface. This layer consists of decomposing surface hoar at and below treeline and suncrusts on steep solar aspects in the alpine.
80cm+ settled snow sits on top of the Dec 2nd interface. This layer consists of decomposing surface hoar at and below tree line and sun crusts on steep solar aspects in the alpine.
Below the light surface snow a soft slab sits on a touchy layer (see details tab). This layer is variable and hard to predict. It has been easily triggered where a sun crust is buried, but may also become more reactive at lower elevations.
The incoming storm has the potential to add significant load to a variable and hard to predict weak layer (see details tab).&nbsp; It has been easily triggered where a sun crust is buried, but is also expected to become more reactive at lower elevations.
The storm is upon us with 15cm snow overnight and another 20cm expected today.  Overloading and failure of the soft slab over the Jan 4th weak layer is expected today resulting in an avalanche cycle.
The Jan 4th interface and associated slab were very reactive yesterday. Expect less natural avalanche activity today but continued elevated sensitivity to human triggering on this layer.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. If storm slabs are triggered the load may be sufficient to wake the Jan 4th up.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. If storm slabs are triggered the load may be sufficient to wake the Jan 4th up.
Although the snow from the recent storms is settling and slowly bonding, tests still indicate that a layer now down 60-100cm is reactive in some areas. It is likely to take a large trigger, like a cornice or another avalanche.
A weak layer down 60-100cm is a wild card. It could pop up anywhere but tests indicate it is more reactive on solar aspects, the same slopes that will be hit by the sun if it comes out. Strong solar could wake this layer up.
The Feb 10 persistent weak layer down 60-100cm is waiting to perform. It is widespread in distribution but most likely to be reactive on solar aspects. Strong SOLAR radiation today could wake this layer up.
Feb 10 interface lingers and may become reactive given prolonged sun or added load such as cornice fall or slab avalanche. 
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
The Feb 10th layer is buried 50-90cm. In some areas there is surface hoar on a crust, creating a dangerous combination. Sensitivity to triggering is variable among terrain features and careful consideration is required. Dig down and test this layer.
The Feb 10th layer is buried 50-90cm. In some areas there is surface hoar on a crust, creating a dangerous combination. Sensitivity to triggering is variable among terrain features and careful consideration is required. Dig down and test this layer.
The Feb 27 crust/ surface hoar layer is down 50-60cm and is producing moderate results in stability tests.&nbsp; When triggered, this layer could propagate into a large avalanche.&nbsp; Dig down and test this layer before committing. It is easy to identify.
The Feb 27 crust/ surface hoar layer is down 60cm and produces sudden results in stability tests. When triggered, this layer could propagate into a large avalanche. With warming temperatures this layer could fail as a moist slab at lower elevations.
The Feb 27 crust/surface hoar layer down 70cm produces sudden results in stability tests.  If triggered this layer could propagate into a large avalanche.  Continued warm temperatures could see this layer failing as a moist slab at lower elevations.
The February 27th interface is now down 70cm and was recently producing sudden planar results on field tests.  If triggered large avalanches could result.  Solar input today could increase this layer's sensitivity.
The February 27th interface is now down 70cm and is producing sporadic sudden planar results on field tests in sheltered areas. If triggered large avalanches could result. Daytime heating and solar input today could increase this layer's sensitivity.
The Feb 27th interface is now down 60cm &amp; is producing sporadic sudden planar results on field tests. It is most active as a crust on South asps and in sheltered areas at treeline. Daytime heating and solar input will increase it's sensitivity
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The Feb 27th interface is now down 60cm &amp; is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading and solar input will </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Flat%20Creek%202016%2003%2009.JPG" target="_blank"><span class="s_9255B882">increase it's sensitivity.</span></a><span class="s_AA239
The Feb 27th interface is now down 60cm &amp; is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading and solar input will increase it's sensitivity.
The Feb 27th interface is down 60cm and is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading will increase it's sensitivity. Wet slabs below treeline from rain.
The Feb 27th interface is down 80cm and is producing sudden planar results on a crust on S though W aspects and surface hoar in isolated spots. This layer has been active recently, triggered by small wind slab avalanches and cornice falls.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Tests, and recent avalanches in the region, continue to show that a layer down 75 to 100 is </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/RB4%28WB%29%20dn%2075cm.JPG" target="_blank"><span class="s_9255B882">triggerable by light loads</span></a><span class="s_AA239A9B"> (that's you). If triggered this layer is</span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/957537630962893/?type=2&amp;theater" target="_blank"><span class="s_9255B882"> likely to propagate</span></a><span class="s_AA239A9B"> into large avalanches. This layer is of most concern on solar aspects.
ont-weight: normal;font-size: 13px;color: #0000FF;text-decoration: underline; } 
</style><p class="p_CC664AAA"><span class="s_AA239A9B">Tests, and recent avalanches in the region, continue to show that a layer down 75 to 100 is </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/RB4%28WB%29%20dn%2075cm.JPG" target="_blank"><span class="s_9255B882">triggerable by light loads</span></a><span class="s_AA239A9B"> (that's you). If triggered this layer is</span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/957537630962893/?type=2&amp;theater" target="_blank"><span class="s_9255B882"> likely to propagate</span></a><span class="s_AA239A9B"> into large avalanches. This layer is of most concern on solar aspects.
Buried crusts are creating persistent instabilities on solar aspects.  Storm snow sits on a crust down 30-50cm. February crust is down 80-120cm and still has surface hoar crystals on top in some places. Locate and test these layers before committing.
Buried crusts and associated weak layers have created persistent instabilities on solar aspects.  Recent storm snow sits on top of crusts 30-50cm down.  Feb 27 interface down 80-120cm still producing sudden planar results.  Take the time to evaluate.
Buried crusts and associated weak layers have created persistent instabilities on solar aspects. Recent storm snow sits on top of crusts 30-50cm down. Feb 27 interface down 80-120cm still producing sudden planar results. Take the time to evaluate.
Buried crusts and associated weak layers have created persistent instabilities on solar aspects. Recent storm snow sits on top of crusts 30-50cm down. Feb 27 interface down 80-120cm still producing sudden planar results. Take the time to evaluate.
Buried crusts have created persistent instabilities on solar aspects. Recent storm snow sits on top of crusts 30-50cm down. The crust of most concern is the Feb 27 interface down 70-120cm, which is still producing sudden planar results.
Buried crusts have created persistent instabilities on solar aspects. The crust of most concern is the Feb 27 interface down 70-120cm, which is still producing sudden planar results.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
Intense solar and warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Intense solar and warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Intense solar and warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Step-down avalanche potential exists with the many crusts buried in the upper metre. Tests on these crusts indicate that it will likely take a heavy load to trigger them, like a cornice fall or another avalanche. Expect large avalanches if they move!
Step-down avalanche potential exists with the many crusts buried in the upper metre, especially on solar aspects. It will take a heavy load to trigger them, like a cornice fall or another avalanche. Expect large avalanches if they move!
A crust buried up to 1m deep may become increasingly reactive over the weekend and be hard to predict. Test results show variability: in some areas it is unreactive and in others it may be triggered by light loads (you!) and produce large avalanches.
Forecast snow and wind might make a crust buried up to 1m deep more reactive and unpredictable. Test results show variability: in some areas it is unreactive and in others it may be triggered by light loads (you!) and produce large avalanches.
Storm snow loading on top of the persistent slab/Nov crust could make this deep slab more reactive. Field tests so far show variability with areas that are unreactive and others where light loads may trigger slides on this layer.
The snow from the past week has been slow to form a slab in part due to continued cool temperatures and little wind. Slab properties are now starting to form and this is a concern, given the poor bond to the Dec 18th facet layer down 50-60cm.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The weak, facetted snow from the cold snap in early December is now buried ~70-100cm. The slab over this layer is developing, and as the load on this layer grows it may become increasingly reactive.
Persistent slabs are most volatile near ridge crest, shallow areas and lee features. Down flow winds in the Sir Don Range have been observed. This layer overlies a variety of interfaces from surface facets to wind slabs.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm.  Before last week's storm it was giving easy sudden planar results and was reactive to human triggering.  If the storm slab releases it has the potential to step down to this deeper weak layer.
The January 25th sun crust, weak layer is buried down approx 60cm.  Before last week's storm it was giving easy sudden planar results and was reactive to human triggering.  Warming surface layers may reawaken this layer today.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests have been finding isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests show isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests show isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Tests show isolated sudden planar results, making them hard to predict. Be cautious in shallow snowpack areas (ridge-crests) where triggering is more likely.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Tests show isolated sudden planar results, making them hard to predict. Be cautious in shallow snowpack areas (ridge-crests) where triggering is more likely.
Weak layers in the top meter include sun crusts on S'ly aspects and pockets of surface hoar on N'ly aspects. Field tests show isolated sudden planar results, making the weak layers hard to predict. Be careful in thin snowpack locations.
A crust buried last Sunday could act as a bed surface, if slab properties are enabled with daytime heating on solar aspects. Loose dry avalanches are also possible.
Buried crusts on solar aspects are hidden under the march snow. A snow profile yesterday on a south aspect showed the storm snow bonding to the crust, however skiers were able to trigger slab avalanches on this layer earlier in the week.
Buried crusts on solar aspects are hidden under the march snow. Skiers were able to trigger slab avalanches on this layer earlier in the week and yesterday.
Buried crusts on South and West aspects are hidden under the march snow. Skiers were able to trigger slab avalanches on this layer earlier in the week.&nbsp; Take time to assess the how the snow is bonding when moving onto solar aspects
Buried crusts on South and West aspects are hidden under the March snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Recent storm snow has a high potential to dig down and trigger these deeper slabs.
Buried crusts on South and West aspects are hidden under the March snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Recent storm snow has a high potential to dig down and trigger these deeper slabs.
Buried crusts on solar aspects are hidden under our recent storm snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Avalanches triggered in the storm snow have a high probability to overload this layer.
Several persistent weak layers are in the upper snowpack. There is step down potential for storm slab releases to dig down to these layers resulting in large dangerous avalanches.
Rain soaked snow yesterday will have penetrated deep into the snowpack, lubricating the deeper persistent layers of concern. As the storm slabs fail above these layers it will easily step down to the Feb 28th interface and deeper.
Persistent deep layers made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down weak layers from late February.
Arial';font-style: Normal;font-weight: normal;font-size: 13px;color: #000000; } 
</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down to weak layers from late February.
Arial';font-style: Normal;font-weight: normal;font-size: 13px;color: #000000; } 
</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down to weak layers from late February, or deeper in shallow areas.
Arial';font-style: Normal;font-weight: normal;font-size: 13px;color: #000000; } 
</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface slabs fail, avalanches can easily step down to weak layers from late February, or deeper in shallow areas.
It is an impressive and humbling time to be traveling in the back-country. Very large avalanches have been occurring, even logging mature timber. The scary thing is, these large avalanches continue to occur sporadically and are very hard to predict.
It is an impressive and humbling time to be traveling in the back-country. Very large avalanches have been occurring, even logging mature timber. These large avalanches continue to occur sporadically and are very hard to predict.
The month of March has been characterized by heavy loading of new snow and rain. These events have created an instable snowpack that is verging on a tipping point. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain.  After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain. After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain. After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
Soft slabs overlie a series of strong crusts in most areas. As freezing levels rise this slab is expected to be increasingly reactive. These slabs will be deepest in areas that have been wind-loaded.
Cornices dropping and smaller avalanches have recently triggered deep, persistent weak layers. The resulting avalanches have been observed to run well into the valley bottoms. With continued loading during the storm likelihood will increase.
Cornices dropping and smaller avalanches have recently triggered deep, persistent weak layers. The resulting avalanches have been observed to run well into the valley bottoms. With continued loading during the storm likelihood will increase.
Cornices and smaller avalanches have recently triggered deep, persistent weak layers. The resulting avalanches have been observed to run well into the valley bottoms. With daytime warming, the likelihood will increase.
Storm slabs are most volatile where they overlie a crust on solar aspects. 50+cm of new snow accompanied by warm temperatures and wind fell over the last week in the alpine and upper end of tree line.
There are multiple crusts in the upper metre of the snowpack, each providing a smooth sliding layer if avalanches dig down and trigger the deeper layers. Solar aspects are the biggest concern with day-time warming and a powerful April sun.
The Halloween Crust layer is buried down approximately 70 cms, with the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does the resulting avalanches would be large!
The Halloween Crust layer is buried down approximately 90cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does &quot;wake up&quot; the resulting avalanches would be large!
The Halloween Crust layer is buried down approximately 100cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does &quot;wake up&quot; the resulting avalanches would be large!
The Halloween crust, while stubborn is active given the right location.  This layer can be found down approx 100cm and is a developing problem.
Warm temperatures and continued loading should be enough to awaken the Oct 31st crust over the next 48hrs. The question is timing which may be later today or into Thursday morning.
Rain penetrating the upper snowpack can percolate down to the halloween crust, awakening this layer.
This layer was awakened by heavy loading during the last storm. Although natural avalanche activity has subsided, this crust remains a concern due to its persistent nature in the snowpack. Human triggering is certainly possible.
Recent storm snow is shifting into a settled persistent slab. Expect the slab to be increasingly sensitivity as you transition into wind effected terrain. Steeper solar slopes harbor a thin crust layer below slab and a facet surface hoar combo BTL.
Recent storm snow is settling into a persistent slab. Expect the slab to be increasingly sensitivity as you transition into steep and/or wind effected terrain. Solar aspects harbor a thin crust layer below the slab and a facet surface hoar combo BTL.
Recent storm snow is settling into a persistent slab. Expect the slab to be more sensitive as you transition into steep and/or wind effected terrain.&nbsp; South and West aspects have a thin crust layer below the slab and a facet/surface hoar combo BTL.
Recent storm snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more sensitive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
40-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
30-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
30-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
40cm+ of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to possibly be reactive on steep unsupported and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but a warming trend may make it more reactive especially on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but today's warming trend may make it more reactive especially on steep unsupported terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion, limiting natural and skier triggered avalanches so far.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion however this is expected to change with the warming trend.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~100cm. Previous warm temps have slabbed up the upper snow pack. This interface is reactive with skier remote slides Wednesday and a skier buried in a terrain trap on Monday.
A reactive slab continues to settle, warming temps in the next couple days will make it more touchy. The slab is poorly bonded in areas where the Jan 4 surface hoar is well preserved. If triggered avalanches could step down to the Dec 15th PWL.
The Jan 4th and Dec 15 surface hoar layers are widespread around tree line and below, buried ~60cm and ~90cm respectively. The forecasted warm temps will further slab up the upper snow pack and avalanche activity is expected throughout the day. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The Jan 4 and Dec 15 surface hoar layers are down ~60cm and ~90cm respectively. These layers are widespread at treeline. A receding weak temp inversion and mainly cloudy conditions should reduce reactivity compared to recent days.
The Jan 4 and Dec 15 surface hoar layers are down ~65cm and ~95cm respectively. These layers are widespread at treeline. 10cm storm snow in the last 24hrs will add load to the slab over these weak layers.
The Jan 4 and Dec 15 surface hoar layers are down ~70cm and ~100cm respectively. These layers are widespread at treeline. 20cm storm snow in the last 24hrs will add load to the slab over these weak layers.
The Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. Daily snowfalls add up. This incremental loading can increase the sensitivity of deep layers that may be forgotten, but not gone.
The January 4th surface hoar is down 60cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be more sensitive in thin areas.
The January 4th surface hoar is down 60cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be more sensitive in thin areas.
The January 4th surface hoar is down 70cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be sensitive in thin areas.
Natural avalanche activity will increase today with forecasted new snow and ongoing winds. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can certainly step down and trigger these weak interfaces.
Natural avalanche activity will increase today with forecasted new snow and ongoing winds. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
The Jan 16th, 4th and Dec 15th surface hoar layers have been quiet recently but may reawaken given a large trigger such as a storm slab avalanche or cornice fall.
The Jan 16th, 4th and Dec 15th surface hoar layers have been quiet recently but may reawaken given a large trigger such as a storm slab avalanche or cornice fall.
Several deeply buried persistent weak layers are primed for natural and skier triggering with the new storm load. These slides have the potential to reach the full extent of their run-out zones. Mature timber may not be a default safe spot today.
Several deeply buried persistent weak layers have become reactive with the new snow load. If these layers are triggered the resulting avalanches will have the potential to reach the full extent of their run-out zones, possibly even further.
Deeply buried persistent weak layers were reactive in the recent avalanche cycle. Larger loads such as storm slab or cornice fall may trigger these layers. Resulting avalanches will have the potential to reach the full extent of their run-out zones.
Back into lower probability but high consequence of a large avalanche if triggered with the PWL. Large loads such as wind slab or cornice fall may trigger these layers. Resulting avalanches will be large and may reach the end of their run-out zones.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms we've seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms we've seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
Persistent weak layers continue to linger and may be susceptible to human triggering in shallow areas. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
Persistent weak layers continue to linger and are most likely triggered in steep, shallow, rocky, unsupported terrain features. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
Persistent weak layers continue to linger and are most likely triggered in steep, shallow, rocky, unsupported terrain features. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
Persistent weak layers continue to linger and are most likely triggered in steep, shallow, rocky, unsupported terrain features. Large triggers such as cornice fall may also wake up these deeper weak layers resulting in large avalanches.
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This layer has the potential to be human triggered with wide propagation.
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This is a bad combo of a weak layer and strong bed surface. This layer has the potential to be human triggered with wide propagation. Dig down and have a look for it.
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This is a bad combo of a weak layer and strong bed surface. This layer has the potential to be human triggered with wide propagation. Dig down and have a look for it.
A suncrust is buried 40-70 cms on solar aspects. This layer has the potential for human triggering, dig down and assess the snowpack before committing to your line.
Suncrusts are buried 20-50 cms on steep solar aspects. This layer has the potential for human triggering, dig down and assess the snowpack before committing to your line.
Several sun crusts are buried within the top 50 cms on steep solar aspects. These layers have the potential for human triggering, dig down and assess the snowpack before committing to the line.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for storm snow avalanches to trigger this lingering problem.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for smaller avalanches to trigger this lingering problem.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for smaller avalanches to trigger this lingering problem.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for smaller avalanches to trigger this lingering problem.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer was whumphing and tests showed potential for wide propagation if this layer is triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer was whumphing and tests showed potential for wide propagation if this layer is triggered. Avoid convexities and thin snowpack areas on solar aspects.
70-90cm of settled snow sits on the mid March crust/facet combo. In recent tests this layer fails suddenly and has showed potential for wide propagation if triggered. Avoid convexities and thin snowpack areas on solar aspects.
70-90cm of settled snow sits on the mid March crust/facet combo. In recent tests this layer fails suddenly and has showed potential for wide propagation if triggered. Avoid convexities and thin snowpack areas on solar aspects.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On solar aspects, this layer fails suddenly in stability tests and has shown potential for wide propagation if triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On solar aspects, this layer fails suddenly in stability tests and has shown potential for wide propagation if triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On solar aspects, this layer fails suddenly in stability tests and has shown potential for wide propagation if triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On S'ly aspects, this layer fails suddenly in stability tests. Continued warming and overloading may cause this layer to fail.
70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the mod-hard range in stability tests on solar aspects. This layer might become more active with the incoming snow/rain and rising temperatures.
70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the moderate-hard range in stability tests on solar aspects.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
The Nov 6 crust complex has yet to wake up. While the likelihood of triggering is low, it will produce large avalanches. As the load on this layer increases, it may become reactive. Smaller avalanches may step down to this deeper layer.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
While the thick crust at the base of the snowpack has yet to be reactive, if it does produce an avalanche it will be very large. Cornice falls or other avalanches stepping down to this layer, or triggering from thin areas are possible.
The January 4 surface hoar, sun crust, facet interface will likely become a persistent weak layer in the weeks to come.  Recent strong winds have already created harder wind slabs at and above treeline on this layer.
A persistent weak layer down 50 to 70cm is reactive to skier triggering.  Our observations suggest the most reactive locations are steep S/SW facing slopes and open glades. Strong south winds may have created harder wind slabs at and above treeline.
A persistent weak layer down 50 to 70cm is reactive to skier triggering. Our observations suggest the most reactive locations are steep S/SW facing slopes and open glades. Strong south winds may have created harder wind slabs at and above treeline.
A cohesive slab overlies a persistent weak layer. Variable distribution and composition makes this layer difficult to predict. Tests on this layer indicate it is skier triggerable and observations indicate it is most reactive on steep S'ly aspects.
A cohesive slab overlies a persistent weak layer. Variable distribution and composition makes this layer difficult to predict. Tests on this layer indicate it is skier triggerable and observations indicate it is most reactive on steep S'ly aspects.
A cohesive slab overlies the January 4 persistent weak layer. Variable distribution and composition makes this layer difficult to predict.  It is most reactive on steep solar aspects.  There have been two skier triggered slides on this layer.
The January 4 crust-facet interface (down 60 cm) remains a concern.  It is most problematic on steep S and W aspects.  The slab above this is becoming more cohesive, and skier triggering remains likely.
The January 4 crust-facet interface (down 60 cm) remains a concern.? It is most problematic on steep S and W aspects.? The slab above this is becoming more cohesive, and skier triggering remains likely.
The January 4 crust-facet interface (down 60 cm) remains a concern. It is most problematic on steep S and W aspects. The slab above this is becoming more cohesive, and skier triggering remains likely.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects and produced several skier triggered avalanches last week. Human triggering is still possible, or windslabs may step down to this layer.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects and produced several skier triggered avalanches last week. Human triggering is still possible, or windslabs may step down to this layer.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects and produced several skier triggered avalanches last week. Human triggering is still possible.
A persistent layer down ~40cm remains a concern. It has been most reactive on steep, solar aspects.
A weak layer down around 50 cm remains a concern. It has been most reactive to rider triggering on steep slopes where a sun crust is present.
A weak layer down around 65-90 cm might still be reactive to skier triggering. No natural avalanches have been observed on this layer recently. New snow overnight may overload this layer, causing it to fail with the additional weight of a rider.
A weak layer down around 80-100 cm might still be reactive to skier triggering. No natural avalanches have been observed on this layer recently. New snow overnight may overload this layer, causing it to fail with the additional weight of a rider.
2 layers, down ~40 and ~80cm, exist in isolated areas (see forecast details). They have been reactive to ski cutting on steep unsupported features in Rogers Pass, and in the surrounding region caused several human triggered size 2 avalanches.
A touchy surface hoar layer is down 25-40cm. There have been human triggered avalanches on this layer daily. Avalanches are increasingly possible with new snow and rising winds today adding load, and mild temperatures making the slab more cohesive.
A touchy surface hoar layer is down 35-55cm. Human (even tree bomb) triggered avalanches have occurred daily. Avalanches are increasingly possible with new snow and rising winds today adding load, and mild temperatures making the slab more cohesive.
A touchy surface hoar layer is down ~50cm. Human (even tree bomb) triggered avalanches have occurred daily. Avalanches are increasingly possible with new snow load and mild temperatures making the slab more cohesive.
The Feb 12 PWL is becoming more reactive as it matures.&nbsp; Skier triggered and natural avalanches have been increasing on this layer, with RB scores of 2, whole block.&nbsp; It is most reactive on solar aspects between 17-1900m.
A &quot;persistent weak layer&quot; (Feb 12 SH) is now down 50-60 cm from the surface, and is sporadically reactive to skier triggering.  Wide propagations are possible, especially on sunny aspects where it sits on a sun crust, between 17-1900m.
A &quot;persistent weak layer&quot; (Feb 12 SH) is down 50-60 cm from the surface, and remains sporadically reactive to skier triggering.  Wide propagations are possible, especially on sunny aspects where it sits on a sun crust, between 17-1900m.
A weak layer is down 40-50cm. It is most likely to be skier-triggered around 17-1900m, avoid open slopes and convex rolls. On sunny aspects the weak layer can be touchy.  Natural avalanche activity will increase on this layer today with the new snow.   
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> A weak layer is down 50-70cm. It is most likely to be skier-triggered around 17-1900m, avoid open slopes and convex rolls. On sunny aspects the weak layer can be touchy. See </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://avalancheinfo.net/Parks/Glacier/Images/2013-02-23%20Sz%202%20Sc.jpg" target="_blank"><span class="s_9255B882">image</span></a><span class="s_AA239A9B"> of skier-triggered avalanche yesterday on this layer at 1700m.
A buried surface hoar layer, down 40-50cm, reactive to skier triggering particularly where it sits on a crust on steep south aspects. The overlying slab is stiffening and will produce larger propagation avalanches when triggered.
More load over the surface hoar layer buried 40-55cm. This layer is reactive to rider triggering and remote triggering. The overlying slab will continue to produce avalanches with larger propagation and more consequence for the foreseeable future.
Surface hoar layer buried 40-55cm. This layer is reactive to rider triggering and remote triggering. The overlying slab will continue to produce avalanches with larger propagation and more consequence for the foreseeable future.
Surface hoar layer buried 40-55cm. This layer is reactive to rider triggering and remote triggering and has been seen to be most reactive where the surface hoar is sitting on a sun crust or firm layer in the snowpack (bed-surface).
Surface hoar layer buried 45-60cm. This layer is reactive to rider triggering and remote triggering and has been seen to be most reactive where the surface hoar is sitting on a sun crust or firm layer in the snowpack (bed-surface).
A weak surface hoar layer is now down ~85cm. This layer has been triggered by humans; remotely from 40m away, and capable of wide propagations up to 150m. Rapid loading or other avalanches may trigger this layer and produce very large avalanches.
A weak surface hoar layer is now down ~1m. This layer has been triggered by humans; remotely from 40m away, with propagations up to 150m wide. Rapid loading and other avalanches triggered this layer yesterday producing very large avalanches.
A weak surface hoar layer is now down ~1m. This layer has caused widespread avalanches: natural's up to size 4, and size 2.5 human triggered avalanches. In areas where it hasn't already avalanched it is very reactive, and has been remotely triggered.
A weak surface hoar layer is now down ~1m. This layer has caused widespread avalanches: natural's up to size 4, and size 2.5 human triggered avalanches. In areas where it hasn't already avalanched it is very reactive, and has been remotely triggered.
A weak surface hoar layer is now down ~1m. This layer has caused widespread avalanches: natural's up to size 4, and size 2.5 human triggered avalanches. In areas where it has not already avalanched it remains touchy, and has been remotely triggered.
The Feb 12 PWL continues to be a concern. During the last storm cycle several avalanches &quot;stepped&quot; down to this layer.  It will remain a problem for some time.
The Feb 12 PWL continues to be a concern. During the last storm cycle several avalanches &quot;stepped&quot; down to this layer. It will remain a problem for some time.
The Feb 12 PWL continues to be a concern. During the last storm cycle several avalanches &quot;stepped&quot; down to this layer. It will remain a problem for some time.
The surface hoar/crust layer from February is becoming less reactive; a function of it now being 1-1.5m deep and having avalanched in many areas. It is most likely to be triggered on solar aspects or by heavy triggers, resulting in large avalanches.
The surface hoar/crust layer from February is becoming less reactive; a function of it now being 1-1.5m deep and having avalanched in many areas. It is most likely to be triggered on solar aspects or by heavy triggers, resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered on solar aspects from shallow areas or from large triggers such as cornice falls resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered on solar aspects from shallow areas or from large triggers such as cornice falls resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
It will likely take a large trigger, like a cornice fall or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. If triggered, however, the resulting avalanche would be very large and destructive.
It will likely take a large trigger, like a cornice fall or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. If triggered, however, the resulting avalanche would be very large and destructive.
It will likely take a large trigger, like a cornice or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
It will likely take a large trigger, like a cornice or another avalanche to trigger the surface hoar/crust layer from February 12, now down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
It will likely take a large trigger, like a cornice or another avalanche to trigger the surface hoar/crust layer from February 12, now down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
It will likely take a large trigger, like a cornice or another avalanche to trigger the  Feb 12 and March 11 PWL's, now down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
Two weak layers are buried down 1-1.5m.  Though unlikely, a large trigger like a cornice or another avalanche may cause these weak layers to fail. 
Two weak layers are buried down 1-1.5m. Though unlikely, a large trigger like a cornice or another avalanche may cause these weak layers to fail.
Slopes receiving direct sun become more reactive during the day with warming. This is especially likely on steep solar aspects where buried crusts exist. Solar triggered avalanches are most likely around exposed rocks and may trigger deeper slabs.
Slopes receiving direct sun become more reactive during the day with warming. This is especially likely on steep solar aspects where buried crusts exist. Solar triggered avalanches are most likely around exposed rocks and may trigger deeper slabs.
PWL's are becoming stubborn, but should not be discounted.  Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist, but northerly aspects are not immune.
PWL's are becoming stubborn, but should not be discounted.  Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist, but northerly aspects are not immune.
Buried weak layers are stubborn to fail, but should not be discounted. Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist.
Buried weak layers are stubborn to fail, but should not be discounted. Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist.
Weak shallow areas are most sensitive.  The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering. 
Weak shallow areas are most sensitive.  The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering.
Weak shallow areas are most sensitive. The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering.
Weak shallow areas are most sensitive. The character is stubborn to trigger, but seems to result in wide propagations (big avalanches), and is susceptible to remote triggering.
Infrequent large avalanches have occurred on deeper instabilities. Shallow, rocky areas where the snowpack is thin and weak are most likely where they will be triggered.
Infrequent large avalanches have occurred on deeper instabilities. Shallow, rocky areas where the snowpack is thin and weak are most likely where they will be triggered.
A surface hoar layer buried down 50-110cm at the higher elevations is within the range of rider triggering.
A surface hoar layer down 60-120cm will have large consequences if triggered by a rider. Avoid shallow snowpack areas where triggering this layer is more likely.
A surface hoar layer down 60-110cm is in the range of rider triggering or can be triggered by the weight of smaller avalanches . Avoid shallow snowpack areas where triggering this layer is more likely.
The surface hoar buried earlier this month is slowly decomposing, but could be reawakened by surface slabs overloading it.
A variety of weak surfaces, including widespread surface hoar and sun crust on steep solar aspects, make this persistent slab tricky. It may be stubborn to trigger but recent avalanches on this layer have been large and propagated widely.
A layer of concern exists down 30-40 which consists of widespread surface hoar and sun crust on steep solar aspects. It may be stubborn to trigger but recent avalanches on this layer have been large and propagated widely.
A weak layer is buried down 30-40 cm. On steep solar aspects it will be marked by a sun crust. Large avalanches have occurred on this layer in the last week.
The surface hoar layer down 50-100cm remains a concern. Triggering this layer is most likely in and around shallow snowpack areas.
The surface hoar layer from mid November is buried down 60-110cm. Triggering this layer is most likely in and around shallow snowpack areas with large consequences.
The surface hoar layer from early November is buried 60-100cm below the surface. It is most likely triggered in shallow snowpack areas. If it does start to move, expect a large avalanche with nasty consequences.
The early November surface hoar still lingers near the base of the snowpack. It may be triggered from areas with a shallow snowpack. If it does trigger, it could bring a large slide with it.
A weak layer buried in early November is present at the bottom of the snowpack. If you are able to trigger the weak layer, a large consequence avalanche will result.
The storm has rapidly loaded slopes and may overwhelm persistent weak layers buried deeper in the snowpack. Very large avalanches will result if these layers are triggered.
Buried surface hoar down between 60-80cm with a recent significant snow load should remain a concern for rider triggering.
Buried surface hoar down between 80 to 110cm with a recent significant snow load should remain a concern for rider triggering. These layers may also be triggered by other avalanches, producing very large avalanches.
The recent snow has tightened up into a slab. It sits on various weak crystals, like facets or surface hoar, that may be triggered by skiers. If triggered, avalanches may step down to deeper surface hoar layers resulting in very large avalanches.
The recent snow has tightened into a slab. It sits on various weak crystals, like surface hoar and facets, that can be triggered by people. These avalanches may step down to deeper surface hoar layers, resulting in large avalanches.
A weak layer is buried down around 80 cm.&nbsp; If triggered, a large, high consequence avalanche will result. Carefully evaluate big terrain features by digging and testing adjacent, safe slopes.
A weak layer is buried down 60 to 90 cm. If triggered, a large high consequence avalanche will result. Carefully evaluate big terrain features by digging and testing adjacent, safe slopes.
2 weak layers exist in the snowpack, these are down between 70 and 110cm. They could become reactive with this additional snow load having very large consequences if triggered.
2 weak layers exist in the snowpack, these are getting deeper as snow amounts increase. They are down between 70 and 120cm and will have devastating consequences if triggered.
The interface between the December snow and the facetted November snow, down ~80cm is the biggest concern. Although this interface is becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Persistent weak layers down ~80cm (facets), and down ~115cm (surface hoar) continue to be reactive in specific locations. Although these interfaces are becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Persistent weak layers down ~80cm (facets), and down ~115cm (surface hoar) continue to be reactive in specific locations. Although these interfaces are becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Weak layers are buried down 80 to 100 cm. In a shallow snowpack where the weak layer is well-preserved, a skier could fail these layers.
The 2 buried weak layers down 70 to 110cm are still producing results in our snowpack tests. Caution around shallow snow pack areas where triggering these layers is most likely.
2 buried weak layers down 70 to 110cm remain a concern for riders. Consequences would be large if triggered which is more likely from shallow snowpack areas.
The presence of buried surface hoar remains a concern for backcountry riders. The potential for a large avalanche on this layer still exists.
The presence of a deep surface-hoar weakness remains a concern for backcountry travelers. It will likely take a large load to trigger it, like a cornice or someone who ate too many perogies over Christmas.
A deep persistent weakness lingers, down roughly 120cm. It will take a large trigger to initiate this layer, but if it starts to move, propagation would likely be wide and deep, creating a larger avalanche.
The heavy trigger may have arrived with this latest dump. Large avalanches are occurring, and may be stepping-down to this deeper layer.
The persistent weak layers are now fairly deep in the snowpack. They will&nbsp; likely need a sizeable trigger, like an avalanche or a large chunk of cornice falling. They may be triggered from thin snowpack areas by a lighter trigger, like you.
The current rapid loading event could reawaken the deep slab that has been sleeping for the past week.
The November persistent weak layer is more likely to be triggered in times of heavy loading such as these with storm snow avalanches stepping down to this layer.
The November surface hoar layer can still be triggered by large triggers such as avalanches or cornice fall. There have been reports of backcountry operations seeing avalanches failing on this layer in the region.
The recent avalanche cycle showed the reactivity of the snowpack to rapid loading and its capability to produce large avalanches. Until the snowpack adjusts to the new load these layers may be reactive. Be cautious in areas that have not avalanched.
The recent avalanche cycle showed the reactivity of the snowpack to rapid loading and its capability to produce large avalanches. Likely triggers are cornices failing and other avalanches stepping down. Be cautious in areas that have not avalanched.
Be cautious in areas that have not avalanched. The recent avalanche cycle showed the reactivity of the snowpack to rapid loading and its capability to produce very large avalanches. Cornices could be the large trigger to break down to the deep layers
A weak layer buried down over 2 m will take a large trigger to fail. Limit your exposure to cornices.  A cornice fall to could be just the right trigger to fail this weak layer.
A weak layer buried down over 2 m will require a large trigger to fail.&nbsp; Limit your exposure to cornices.&nbsp; A cornice fall could be just the right trigger to fail this weak layer.
The November persistent weak layer will need a large load to be triggered. Its distribution is waning but still lingers in isolated spots.
The November persistent weak layer will need a large load to be triggered (i.e. cornice fall). Its distribution is waning but sill lingers in isolated spots.
The November persistent weak layer will need a large load, like a cornice, to be triggered. The isolated nature of its distribution makes it hard to forecast for this layer.
The November persistent weak layer will need a large load to trigger it, like a cornice. The isolated nature of its distribution makes it hard to forecast for this layer.
The November persistent weak layer will likely need a large load to trigger it, like a cornice. This is the classic low probability-high consequence problem. It's patchy distribution makes it hard to forecast, but if it wakes up watch out!
This layer has spotty distribution and will need a large load to trigger or can potentially be triggered from thin snowpack areas.
This layer has spotty distribution and will need a large load to trigger or can potentially be triggered from thin snowpack areas
This problem is becoming increasingly challenging. The clues of instability, like cracking and whumphing are tapering off, but tests and continued avalanches indicate that this thick slab is triggerable and will produce very large avalanches.
A strong slab overlies a very weak layer buried down 1-1.5m. The snowpack now demands your respect, if you trigger this layer a large, high consequence avalanche will result.&nbsp; Use caution in shallow snowpacks, where triggering is more likely.
A strong slab overlies a very weak layer buried down 1-1.5m. The snowpack now demands your respect, if you trigger this layer a large, high consequence avalanche will result.&nbsp; Use caution in shallow snowpacks, where triggering is more likely.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> </span><span class="s_E6FD2046">The slab overtop the weak layers down 1-1.5m continues to settle and become more cohesive. This problem will take a while to heal and requires good terrain management. Be particularly weary of open unsupported slopes and convex rolls below tree line.
The 1-1.5m slab over the weak layers continues to settle and become more cohesive. This problem will take a while to heal and requires good terrain management. Be wary of open, unsupported slopes and convex rolls, particularly at tree-line and below.
The 1-1.5m slab overlying the Feb 10th weak layer is slowly bonding to this interface, but is still reactive in tests. This problem requires good terrain management, such as avoiding large convexities and sticking to supported features.
A weak, persistent layer is buried under a thick slab. This layer is becoming more difficult to trigger, but if triggered will propagate widely producing a very large avalanche. Choosing appropriate terrain is key in managing this problem.
As this weak layer, buried down around 1 m, gains strength human triggered avalanches are still possible. Areas of concern are open, unsupported slopes, convex terrain and thin snowpack areas.
As this weak layer, buried down around 1 m, gains strength human triggered avalanches are still possible. Areas of concern are open, unsupported slopes, convex terrain and thin snowpack areas.
The sun crust/surface hoar layer down 1-1.5m is still producing hard sudden results in snowpack tests. This indicates that the layer is difficult to trigger but will propagate widely if it does.
The suncrust/surface hoar layer down 1-1.4m is still producing hard, sudden results in snowpack tests. This indicates it is stubborn to trigger, but if initiated, it will propagate widely, producing large avalanches.
Lingering deep (1-1.4m) in the snowpack, the surface hoar/facet/crust sandwich continues to produce hard, sudden results in tests. If a large enough trigger gets this layer to fail, avalanches will be very large.
The facet/crust &quot;sandwich&quot; is buried 120-150cm below the surface now. It is still producing hard, sudden results in tests, indicating that it can will propagate if a large enough trigger hits it. Avalanches digging into this layer will be large!
This last storm, and the forecast dump of snow this weekend, may wake a weak persistent layer up. This layer, buried ~1.5m deep, is still reactive in snowpack tests and if triggered will produce very large and destructive avalanches.
A deep weak layer buried at the end of January is down around 1.5 m. Although we have not observed any recent skier-triggering of this layer, artillery control triggered this layer on the west side of the park, releasing a size 3.5.
A deep weak layer buried at the end of January is down 1.8 to 2 m.&nbsp; Smaller avalanches could step down and trigger as large, high consequence avalanche on this layer.
A sun crust down ~1m is well within the range of human triggering on south and west aspects. The February surface hoar/crust layer down ~1.5-2m which can reawaken with a heavy trigger such as a large cornice release.
2 buried weak layers have been reactive this week. Down ~1m, is a sun crust on south and west aspects. The other is the other is Feb. surface hoar/crust layer down ~1.5m-2m which still shows wide propagation potential in snowpack tests.
There are two layers of concern. The first is a sun crust on S-SW slopes, buried ~1m deep. The second is the Feb 10 surface hoar/facet complex, down 1.5-2m. Both exhibit sudden failures, meaning there is potential for wide propagation.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The Mar 2 and Feb 10 layers are buried 1m and 1.5-2m respectively. Test results are still exhibiting sudden planar results in the hard range, meaning a deep slab could </span><a href="https://www.facebook.com/photo.php?v=637161176333875" target="_blank"><span class="s_9255B882">propagate widely.</span></a><span class="s_AA239A9B">
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">We are expecting over 50cm of snow this weekend, with strong westerly winds. This will rapidly load the persistent weak layer down 1.5-2m. This layer continues to be </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://avalancheinfo.net/Images/BLong-8436.jpg" target="_blank"><span class="s_9255B882">reactive and surprise people</span></a><span class="s_AA239A9B"> throughout the region, producing impressive avalanches.
This sudden heavy snow load is likely to reawaken the deeper persistent weak layers creating very large avalanches. Avoid crossing avalanche paths until the storm ends and temperatures cool down.
Down around 1-1.25m is a buried crust from early March. Backcountry users have been reporting whoomphs and remotely triggering this layer prior to this latest storm. Extra caution on steep south and west slopes where the crust was well formed.
A weak layer from early March within the range of rider triggering may catch you by surprise. Triggering this layer is more likely on steep south and west aspects where the crust had a chance to fully form.
The early March crusts are buried by over a metre of snow, but are still triggerable by people. They are more likely to fail on steeper S and W aspects.
This layer is patchy which makes it difficult to predict. It is likely to be most reactive on solar aspects where it is comprised of a sun crust with surface hoar. If triggered it has properties and is deep enough to result in a large avalanche.
This layer is deep enough to cause a large avalanche and shallow enough to be triggered by people, a dangerous combination. It's been most reactive on solar aspects where the crust is thickest and most likely to be triggered from shallow snow areas.
Reports of whoomphing and natural activity observed on this layer yesterday indicate it's volatility. This layer is deep enough to cause a large avalanche and shallow enough to be human triggered, a dangerous combination.
The Mar 2nd crust is dwn around 1.25m. The slab overtop the weak layers down 1-1.5m continues to settle and become more cohesive.
Snowpack tests yesterday show the Mar 2 layer down ~1m to still be reactive with large consequences if triggered. Shallow snowpack areas, like slopes that have lots of rocks poking out, seem to be the most likely areas for this to happen.
The early March weak layer down ~1m is reactive in snowpack tests with hard sudden results. We still see sporadic large avalanche events that fail on this layer. Choose supported slopes that have uniform snow cover.
The early March weak layer is still reactive with hard, sudden planar results in tests. Sporadic large avalanche events are still occurring on this layer, so heads-up with the new loading overnight. Stick to supported features today.
Weak layers from early March, now buried a meter deep, are still reactive in tests. They are most likely to be triggered on solar aspects where sun crusts exist. Smaller avalanches may step down to these layers, resulting in a big avalanche.
Weak layers from early March, now buried a meter deep, are still reactive in tests. They are most likely to be triggered on solar aspects where sun crusts exist. Smaller avalanches may step down to these layers, resulting in a big avalanche.
A weak layer down 20-30 cm is still reactive to skier-triggering. Use caution on unsupported features and convex terrain. Watch for changing conditions as temperatures warm up today and surface crusts deteriorate.
more reactive on solar aspects.
Many weak layers are buried within the snowpack in the upper 2m. These are all deep enough to cause large avalanches that will inflict significant damage. Shallow areas and day time warming are most likely to trigger them.
The sun will get deep into the snowpack today and could reawaken one of the many buried weak layers. Avoid slopes where rocks are evident on the surface as they are likely to attract more heat to trigger those layers.
There are numerous sliding layers buried in the upper 1-1.5m of the snowpack. If we see any strong sunshine today, there could be avalanches stepping down to these layers.
The upper 1-1.5m of the snowpack has numerous sun and temperature crusts within it. These may become sliding layers with day-time warming and the possibility of a strong April sun popping onto the slopes.
Be aware that small avalanches have the ability to trigger larger step down avalanches.
Many crusts on solar aspects are buried within the 1m range. At this depth they can be triggered by humans. Avoid shallow snowpack areas where it is most likely to initiate an avalanche on this layer.
The upper snowpack consists of many buried crusts on solar aspects. Triggering these layers is most likely from slopes where the snowpack is shallow and/or if there is strong solar radiation even if this is for brief moments.
The deeper instabilities that exist in our snowpack can reawaken with the increase in temperatures or added weight of snow/rain. Avoid those shallow snowpack areas where triggering these layers is most likely.
We may see the deeper instabilities reawaken with the warm temperatures, and possibly rain, moving into the snowpack. Try to avoid shallow, thin areas where a person could trigger a deeper weakness.
Be aware that step down avalanches are possible if storm slabs or wind slabs are triggered in wind loaded areas.
The large size 3.5 from Moccasin Flats 36 hours ago shows the persistent slabs have not gone away. Larger triggers, like cornices or surface avalanches, may step down to deeper layers.
Without a good refreeze, there is less structure to the snowpack to prevent it from stepping down into the lower persistent weaknesses. The large size 3.5 from Moccasin Flats 2 days ago illustrates the potential destructive force lingering out there.
Weak layers buried deeply in the snowpack are still releasing naturally and producing avalanches up to size 3.5.  Warm temperatures and solar inputs elevate this hazard. Large, heavy triggers like cornice falls could trigger a large avalanche.
The Mar 2nd crust and Feb 10 layer can be triggered by heavy loads such as cornices or loose wet slides, a likely scenario with the forecast strong solar inputs.
The Feb 10 layer is the monster that can be triggered by heavy loads. It is still a 3-5cm thick sandwich complex layer of SH, FC and crusts.
Deeper persistent layers will require a large trigger to initiate, or a couple of people hitting a thin, weak spot in the snowpack.&nbsp;
2 weak layers within our snowpack, down ~1m and ~1.2m that are producing tests results to be concerned about. Whoomphing and cracking may not be as prevalent due to the depth of the layer but if triggered the slab is likely to propagate.
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. As temperatures rise the likelihood of triggering will increase and they are capable of producing very large avalanches. Be especially cautious on planar open slopes.&nbsp; </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. They are capable of producing very large avalanches and may be triggered by skiers. As temperatures warm over the next few days the likelihood of triggering will increase.
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. They are capable of producing very large avalanches and may be triggered by skiers. Trigger points include steep alpine terrain, thin areas, and unsupported open slopes.
Persistent weak layers buried down ~1m and ~1.3m are cause for concern. They are capable of producing very large avalanches and may be triggered by skiers. Trigger points include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.&nbsp; Once initiated avalanches triggered in the storm snow may step down to the deep persistent weak layers.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Persistent weak layers that were very reactive earlier this season are expected to wake up again with the rapid loading that is occurring. These layers are capable of wide propagations and producing very large and destructive avalanches.
Persistent weak layers that were very reactive earlier this season are expected to wake up again with the rapid loading that is occurring. These layers are capable of wide propagations and producing very large and destructive avalanches.
Continued warm temperatures and rain at lower elevations are ideal to wake up buried persistent weak layers capable of wide propagations and producing very large and destructive avalanches.
Big triggers like a cornice fall is capable of initiating this layer which would produce a very large avalanche as it would encompass the entire snowpack. Watch your exposure to overhead hazard like cornices when the sun comes out.
This layer is still failing with big triggers. A cornice fall in steep terrain is capable of triggering this instability and causing a large avalanche. Watch your exposure to overhead hazard like cornices.
There is a weakness at the bottom of the snowpack in some areas throughout the Park from the November crust.  Although it is difficult to trigger it should not be discounted. Large loads, like a cornice fall or triggering from a thin spot might do it
Weakness at the bottom of the snowpack in some areas throughout the Park from the November crust.&nbsp; Thin snowpack areas on a large alpine slopes are most suspect to release this layer. It is difficult to trigger but will have large consequences.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
Rider triggered and remote avalanches are happening daily on a widespread surface hoar layer down ~50cm. The overlying slab has gained enough strength to propagate widely which means bigger consequences. This problem will persist for a while.
A touchy surface hoar layer continues to be reactive. Avalanches continue to be triggered, even in areas that have been heavily traveled. Some areas offer no clues of instability, but the potential for large avalanches exist.
A touchy surface hoar layer continues to be reactive. Avalanches continue to be triggered, even in areas that have been heavily traveled. Some areas offer no clues of instability, but the potential for large avalanches exist.
The December 17th surface hoar layer is still reactive.  Avalanches continue to be triggered even in locations previously skied. Some areas offer few clues of the instability but the potential for large avalanches continues.
The December 17th surface hoar layer is still reactive. Avalanches continue to be triggered even in locations previously skied. Some areas offer few clues of the instability but the potential for large avalanches continues.
The Dec17th surface hoar is still reactive, with most events at treeline. A size 2 skier-controlled avalanche released on this layer yesterday. Buried surface hoar requires careful decision making, especially as more new snow continues to fall.
The Dec17th surface hoar is still reactive, particularly at treeline. As new snow continues to fall the consequences of an avalanche on this layer increase, careful decision making is still necessary.
The Dec17 surface hoar is most reactive at treeline. As snow load continues the consequences of an avalanche on this layer increase, careful decision making is still necessary. We suspect yesterdays Teddy Bear Trees avalanche to be on this layer.
The December 17th surface hoar layer is still a real concern in the snowpack.  The significant storm snow load should be increasing the probability of triggering this deeper weak layer.  This layer is most prevalent at treeline elevations.
The December 17th layer produced our larger controlled slides yesterday.  Slides initiating in the storm snow have a good probability of overloading this layer as they gain volume.  This layer is most prevalent at treeline elevations.
The Dec 17 instability is still active. Yesterday a field team triggered a sz 1.5 on a convex roll at treeline that had previously released and since reloaded. This layer is widespread at treeline and should not be forgotten during decision making.
The Dec 17 instability is still active and can be triggered by human loads on convex rolls and steep terrain. The surface hoar sits on a thick crust, providing a bed surface for larger avalanches. This layer is widespread at treeline.
The Dec 17 instability is still active and can be triggered by snow riders on convex rolls and steep terrain. The surface hoar sits on a thick crust, providing a bed surface for larger avalanches. This layer is widespread at treeline.
The Dec 17 instability remains our primary concern. This layer is still active and can be triggered by snow riders in areas where it has not previously avalanche. Likelihood of triggering has decreased but propagation and consequences have increased.
The Dec 17 surface hoar is still a major concern. It has become spotty, but is still reactive in areas where it has not already avalanched. This makes it harder to predict but it is possible to trigger large avalanches where it exists.
The Dec 17 surface hoar is still a major concern. It has become spotty, but is still reactive in areas where it has not already avalanched. This makes it harder to predict but it is possible to trigger large avalanches where it exists.
The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The December 17th could still be reactive in locations where it has yet to avalanche.
The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The surface hoar sits on a thick crust complex which provides a firm failure plane for avalanches.
The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The surface hoar sits on a thick crust complex which provides a firm failure plane for avalanches.
The December 17th surface hoar layer is still a factor to consider in our snowpack. This layer is widespread at treeline, more spotty at alpine elevations and sits on a thick crust complex which provides a firm failure plane for avalanches.
The new snow load or shallower avalanches could reawaken the Dec 17 surface hoar layer down 90-130cm. This layer is widespread at treeline, more spotty at alpine elevations and sits on a thick crust complex.
The December 17 layer may reawaken after being overloaded by slides initiating on the January 15 surface hoar layer. This layer is widespread at treeline and spotty at alpine elevations.
A 60cm+ thick cohesive slab now overlies a very touchy surface hoar layer. Tests indicate that it is likely to propagate if triggered, and avalanches have been remotely triggered from up to 300m away.
A 60cm+ thick cohesive slab now overlies a touchy surface hoar layer. Tests indicate that it may be triggered by light loads (ie you) and likely to propagate widely as the slab stiffens. Avalanches have been remotely triggered from up to 300m away.
A 60cm+ thick cohesive slab now overlies a touchy surface hoar layer. Tests indicate that it may be triggered by human loads and likely to propagate widely as the slab stiffens. Avalanches have been remotely triggered from up to 300m away.
Although this surface hoar layer is now buried 70-100cm deep, it will be easily triggered today with addition of the new snow load. Stability tests show that this layer has good propagation potential, making large avalanches likely.
Mid January surface hoar layer is now buried 60-100cm deep. This layer is likely to become more reactive with the current warm conditions and rain we are receiving. 
Mid January surface hoar layer is now buried 60-100cm deep. This layer is becoming more reactive with the current warm conditions and rain we are receiving.
Natural and artillery triggered avalanches continue to fail on the Jan.15 surface hoar layer, now buried 60-100cm deep. This layer continues to propagate widely into very large avalanches. Avalanches may step down to a deeper layer from mid Dec.
Recent avalanches have been failing on the Jan.15 surface hoar layer, now buried 60-100cm deep. Some avalanches have stepped down to a deeper layer from mid Dec.
Jan 15 surface hoar layer is buried 60-100cm deep. This interface remains reactive due to large, poorly bonded surface hoar crystals.  Avalanches from large triggers such as cornice fall might step down to a deeper layer from Dec 17.
Jan 15 layer is buried 60-100cm deep. This layer remains a concern due to large, poorly bonded surface hoar crystals.  As snow continues to settle, this layer will require larger triggers to initiate. Cornice failures could step down to deep layers.
Jan 15 layer is buried 60-100cm deep. This layer remains a concern due to surface hoar crystals. As snow continues to settle, this layer will require larger triggers to initiate. This layer could be triggered by heavy loads or from shallow areas.
The mid January surface hoar layer is buried 60-100cm deep.&nbsp; Getting this layer to fail will be difficult but triggering it from shallow areas or from heavy loads such as a cornice fall remains possible.
The mid January surface hoar layer is buried 60-100cm deep. Getting this layer to fail will be difficult but triggering it from shallow areas or from heavy loads such as a cornice fall remains possible.
The January 15 surface hoar layer is down 70-110cm.  Large triggers will be required to wake this layer however it remains possible in shallow snowpack areas or from cornice fall.
The January 15 surface hoar layer is down 70-110cm. Large triggers, like a cornice fall or other avalanches, are likely required to trigger this layer. Rapid loading forecast by Friday may reactivate this layer.
The January 15 surface hoar layer buried down 70-110cm is still reactive in many areas. Rapid loading over the next few days may overload it, or storm slab avalanches may step down to this layer.
Rapid loading and warm temperatures are the types of conditions that can re-awaken buried weak layers. Storm slab avalanches may step down to these  layer as well.
Recent intense precipitation and warm temperatures have the ability to reawaken deeper layers. Storm slabs avalanches may step down and propagate on these deep instabilities.
Recent intense precipitation and warm temperatures have the ability to reawaken deeper layers. Storm slabs avalanches may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be discounted just yet. Storm slabs avalanches may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten. They continue to be reactive, and produce very large avalanches. Storm slabs avalanches may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten. They continue to be reactive, and produce very large avalanches. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten, especially while temperatures remain warm. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten, especially while temperatures remain warm. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
Persistent weak layers within the top 150cm of the snowpack should not be forgotten, especially while temperatures remain warm. Smaller avalanches or cornice failures may step down and propagate on these deep instabilities.
We have persistent weak layers down between ~1 to 1.5m. Large triggers such as a cornice failure or triggering from shallow areas may release avalanches these layers.
We have persistent weak layers down between ~1 to 1.5m. A large load such as a cornice failure will be needed to trigger these layers. Alternatively humans may be able to trigger them from shallow areas.
We have persistent weak layers down between ~1 to 1.5m. A large load such as a cornice failure will be needed to trigger these layers. Alternatively humans may be able to trigger them from shallow areas.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. If triggered these layers continue to propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers continue to propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers continue to propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers may propagate widely.
Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers may propagate widely.
Persistent weak layers down 1 to 1.5m will need a large load such as a cornice failure to be triggered. A light load may be able to trigger them from shallow areas. Heads up when traveling on slopes that could be affected by weakening cornices.
Deep persistent weak layers will need a large load such as a cornice fall or another avalanche to be triggered. A light load may be able to trigger them from shallow areas. Heads up when traveling on slopes threatened by cornices above.
There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail. Strong solar radiation or a large cornice failure are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail.  Strong solar radiation or a large cornice failure are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail. Strong solar radiation or a large cornice failure are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but&nbsp; may result in large avalanches if they do fail. Strong solar radiation or a large cornice failures are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but may result in large avalanches if they do fail. Strong solar radiation or a large cornice failures are possible triggers.
There are several weak layers in the snowpack that are now difficult to trigger but may result in large avalanches if they do fail. Strong solar radiation or a large cornice failures are possible triggers.
There are a number of weak layers in the snowpack that are hard to trigger but could result in large avalanches if they fail. Large cornice fall or prolonged strong solar radiation are possible triggers.
Deep instabilities in the snowpack have been dormant in recent weeks but may become reactive. The bridging properties of near surface crusts weaken as the snowpack warms. New snow tonight will make persistent slabs a key problem for the weekend.
Deep instabilities in the snowpack have been dormant in recent weeks but may become reactive. The bridging properties of near surface crusts weaken as the snowpack warms. New snow today will make persistent slabs a key problem.
A multitude of crusts are buried within the top meter of the snowpack. These may become reactive with the new load we received or with solar radiation. The bridging properties of near surface crusts weaken as the snowpack warms.
A multitude of crusts are buried within the top meter of the snowpack. These have may become reactive with the new load we received and with solar radiation. The bridging properties of near surface crusts weaken as the snowpack warms.
A multitude of crusts and a surface hoar layer are buried within the top meter of the snowpack. These may become reactive with solar radiation as the bridging properties of near surface crusts weaken as the snowpack warms.
The upper snowpack is complex, with a multitude of crusts, weak facetted layers, and surface hoar. Solar radiation weakens surface crusts and may make these layers in the top 60cm more reactive. Large slab avalanches have occurred on these layers.
The upper snowpack is complex, with a multitude of crusts, weak facetted layers, and surface hoar. Large slab avalanches continue to sporadically occur on these layers. Cornices are large and fragile and if they fail provide a large trigger.
The upper snowpack is complex, with a multitude of crusts, weak facetted layers, and surface hoar. Large slab avalanches continue to sporadically occur on these layers. Cornices are large and fragile and if they fail provide a large trigger.
The upper snowpack is complex with a multitude of crusts, weak facetted layers, and surface hoar. Large slab avalanches continue to sporadically occur on these layers. Cornices are large and fragile and if they fail provide a large trigger.
The upper snowpack is complex with a multitude of crusts, weak facetted layers, and surface hoar. There have been reports of skier triggered slab avalanches failing down 30-60cm on these crusts from neighboring areas.
The upper snowpack is complex with a multitude of crusts, weak facetted layers, and surface hoar. There have been reports of skier triggered slab avalanches failing down 30-60cm on these crusts from neighboring areas.
Persistent weak layers down 50-100cm have been triggered recently by light loads, such as skiers or sluffing off of cliffs. These layers have been remotely triggered, and have the tendency to propagate widely.
Persistent weak layers down 50-100cm have been triggered recently by light loads, such as skiers or sluffing off of cliffs. These layers have been remotely triggered, and have the tendency to propagate widely.
Persistent weak layers down 50-100cm have been triggered recently by light loads such as skiers and sluffing from steep terrain.  These layers have been remotely triggered and are prone to propagate widely.
Layers down 50-100cm have been triggered recently by light loads such as skiers and sluffing from steep terrain. Remote triggering and wide propagations are possible. Cornice failures from warm daytime temperatures could trigger these layers.
Layers down 40-100cm have been triggered naturally and by light loads such as skiers and sluffing from steep terrain. Remote triggering and wide propagations are possible. Cornice failures from warm daytime temperatures could trigger these layers.
Recent and forecast precipitation could be enough to overload instabilities within our snowpack. A number of weak layers reside in the top 1.5m and were triggered by people in the backcountry last week.
Recent and forecast precipitation should be enough to overload instabilities within our snowpack. A number of weak layers reside in the top 1.5m and were triggerable by people in the back country last week even without this new load.
Continued warm precipitation has been enough to begin to overload the various persistent instabilities in our snowpack. A series of weak layers in the top 1.5m of snowpack should be considered triggerable by back country riders.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
A series of weak layers in the top 1.5m of the snowpack are more easily triggered due to the load added by the new snow and rain over the past week. They may be triggered by the added load of a person, another avalanche or a cornice falling.
Multiple weak layers in the top 1.0 m of the snowpack. These layers may become more reactive as the snowpack warms with daytime heat and weakens them. Large triggers like cornice falls may also do the trick.
Multiple weak layers in the top 1.0 m of the snowpack. These layers may become more reactive as the snowpack warms with daytime heat and weakens them. Large triggers like cornice falls may also do the trick.
Multiple weak layers in the top 1.0 m of the snowpack. These layers may become more reactive as the snowpack warms with daytime heat and weakens them. Large triggers like cornice falls may also cause avalanches to fail on these layers.
Weak layers in the top meter of the snowpack may become more reactive as the snowpack warms with daytime heat. Large triggers like cornice falls may also cause avalanches to fail on these layers.
A weak layer down 65 cm was producing easy sudden shears yesterday, failing on 4F snow between a crust and a more dense layer.  Whumphing and cracking was observed and was suspected to be caused by failure at this layer. 
A 70-90cm slab sits on a suncrust on steep solar aspects and preserved surface hoar at and below treeline. This slab is well formed in areas influenced by strong winds. This layer is becoming less reactive in tests, but remains triggerable by skiers.
80-100cm of storm slab sits on top of the Dec 2 persistent weak layer. This layer is in the form of surface hoar at and below treeline and suncrust on solar aspects in the alpine. The layer is producing hard results on field tests yesterday at 2100m.
80-100cm of  settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and suncrust on solar aspects treeline to alpine. The layer is producing moderate-hard results on field tests yesterday at 2000m.
80-100cm of settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
80-100cm of settled snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
Varying depths of settled snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
80cm of snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and sun crust on solar aspects. Although this layer is becoming less reactive, it is still producing sudden results in stability tests.
80cm of snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and sun crust on solar aspects. Although this layer is becoming less reactive, it may awaken with ongoing incremental snow loading.
80cm+ of settled snow sits on top of the Dec 2nd interface.  This interface consists of surface hoar at and below treeline and suncrust on steeper solar aspects in the alpine.
80cm+ settled snow sits on top of the Dec 2nd interface. This layer consists of decomposing surface hoar at and below treeline and suncrusts on steep solar aspects in the alpine.
80cm+ settled snow sits on top of the Dec 2nd interface. This layer consists of decomposing surface hoar at and below tree line and sun crusts on steep solar aspects in the alpine.
Below the light surface snow a soft slab sits on a touchy layer (see details tab). This layer is variable and hard to predict. It has been easily triggered where a sun crust is buried, but may also become more reactive at lower elevations.
The incoming storm has the potential to add significant load to a variable and hard to predict weak layer (see details tab).&nbsp; It has been easily triggered where a sun crust is buried, but is also expected to become more reactive at lower elevations.
The storm is upon us with 15cm snow overnight and another 20cm expected today.  Overloading and failure of the soft slab over the Jan 4th weak layer is expected today resulting in an avalanche cycle.
The Jan 4th interface and associated slab were very reactive yesterday. Expect less natural avalanche activity today but continued elevated sensitivity to human triggering on this layer.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. If storm slabs are triggered the load may be sufficient to wake the Jan 4th up.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. If storm slabs are triggered the load may be sufficient to wake the Jan 4th up.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. Triggered wind slabs, or larger loads like a group of skiers, may be sufficient to wake the Jan 4th up.
The January 4th interface is buried 50-80cm deep; still within range of being triggered by a person. The incremental loading of smaller storms onto this interface makes it a tricky one to predict when/if it will fail.
Incremental loading by a series of storms is making a weak layer down 50-80cm an increasing concern. This layer lingers in many areas and is sporadically reactive, making it tricky to assess. When it fails, however, large avalanches are the result.
A surface hoar layer now down 60-100cm is likely to be touchy after being overloaded by the storm. This layer lingers in many areas and is sporadically reactive, making it tricky to assess. When it fails, however, large avalanches are the result.
A surface hoar layer now down 60-100cm is likely to be touchy after being overloaded by the storm. This layer lingers in many areas and is sporadically reactive, making it tricky to assess. When it fails, however, large avalanches are the result.
The January 4th interface was recently rapidly overloaded.  This layer is tricky to assess as it is not evenly distributed on the landscape.  It is also only sporadically reactive.  It can be found in many locations 60-100cm down in the snowpack.
The January 4th interface was rapidly overloaded &amp; woke up during last weeks storm. This layer is tricky to assess as it is not evenly distributed on the landscape &amp; sporadically reactive. It can be found in many locations 60-100cm deep.
The Jan 4th interface was rapidly overloaded &amp; woke up during last weeks storm. This layer is tricky to assess as it is not evenly distributed &amp; sporadically reactive. It's down 60-90cm &amp; was still producing whumfs yesterday in the Cannaught drainage
This layer is tricky to assess as it's not evenly distributed &amp; sporadically reactive. It's down 60-90 &amp; was still producing whumfs yesterday in the Cannaught drainage. It may be possible to trigger from a thin area or by a large trigger like cornice
The Jan 4th layer is a lingering concern, and it is a tricky to assess. Where it exists it is down 60-90cm, but it is not evenly distributed &amp; is sporadically reactive. It has been triggered recently by cornices, resulting in large avalanches.
The Jan 4th layer is a lingering concern, and it is a tricky one to assess. Where it exists it is down 80-120cm, but it is not evenly distributed &amp; is sporadically reactive. It has been triggered recently by cornices, resulting in large avalanches.
The Jan 4th layer is a lingering concern down 80-120cm in the snowpack.  it is not evenly distributed and is sporadically reactive.  Added load of storm slabs or cornice fall when triggered may provide sufficient load to wake this layer up.
The Jan 4th interface is a lingering concern.  It can be found down 80-120cm in the snowpack.  It is not evenly distributed and sporadically reactive.  Storm slab failure or cornice fracture may provide the load to wake this layer up.
Although the snow from the recent storms is settling and slowly bonding, tests still indicate that a layer now down 60-100cm is reactive in some areas. It is likely to take a large trigger, like a cornice or another avalanche.
A weak layer down 60-100cm is a wild card. It could pop up anywhere but tests indicate it is more reactive on solar aspects, the same slopes that will be hit by the sun if it comes out. Strong solar could wake this layer up.
The Feb 10 persistent weak layer down 60-100cm is waiting to perform. It is widespread in distribution but most likely to be reactive on solar aspects. Strong SOLAR radiation today could wake this layer up.
Feb 10 interface lingers and may become reactive given prolonged sun or added load such as cornice fall or slab avalanche. 
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
The Feb 10th layer is buried 50-90cm. In some areas there is surface hoar on a crust, creating a dangerous combination. Sensitivity to triggering is variable among terrain features and careful consideration is required. Dig down and test this layer.
The Feb 10th layer is buried 50-90cm. In some areas there is surface hoar on a crust, creating a dangerous combination. Sensitivity to triggering is variable among terrain features and careful consideration is required. Dig down and test this layer.
The Feb 27 crust/ surface hoar layer is down 50-60cm and is producing moderate results in stability tests.&nbsp; When triggered, this layer could propagate into a large avalanche.&nbsp; Dig down and test this layer before committing. It is easy to identify.
The Feb 27 crust/ surface hoar layer is down 60cm and produces sudden results in stability tests. When triggered, this layer could propagate into a large avalanche. With warming temperatures this layer could fail as a moist slab at lower elevations.
The Feb 27 crust/surface hoar layer down 70cm produces sudden results in stability tests.  If triggered this layer could propagate into a large avalanche.  Continued warm temperatures could see this layer failing as a moist slab at lower elevations.
The February 27th interface is now down 70cm and was recently producing sudden planar results on field tests.  If triggered large avalanches could result.  Solar input today could increase this layer's sensitivity.
The February 27th interface is now down 70cm and is producing sporadic sudden planar results on field tests in sheltered areas. If triggered large avalanches could result. Daytime heating and solar input today could increase this layer's sensitivity.
The Feb 27th interface is now down 60cm &amp; is producing sporadic sudden planar results on field tests. It is most active as a crust on South asps and in sheltered areas at treeline. Daytime heating and solar input will increase it's sensitivity
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The Feb 27th interface is now down 60cm &amp; is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading and solar input will </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Flat%20Creek%202016%2003%2009.JPG" target="_blank"><span class="s_9255B882">increase it's sensitivity.</span></a><span class="s_AA239
The Feb 27th interface is now down 60cm &amp; is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading and solar input will increase it's sensitivity.
The Feb 27th interface is down 60cm and is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading will increase it's sensitivity. Wet slabs below treeline from rain.
The Feb 27th interface is down 80cm and is producing sudden planar results on a crust on S though W aspects and surface hoar in isolated spots. This layer has been active recently, triggered by small wind slab avalanches and cornice falls.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Tests, and recent avalanches in the region, continue to show that a layer down 75 to 100 is </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/RB4%28WB%29%20dn%2075cm.JPG" target="_blank"><span class="s_9255B882">triggerable by light loads</span></a><span class="s_AA239A9B"> (that's you). If triggered this layer is</span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/957537630962893/?type=2&amp;theater" target="_blank"><span class="s_9255B882"> likely to propagate</span></a><span class="s_AA239A9B"> into large avalanches. This layer is of most concern on solar aspects.
ont-weight: normal;font-size: 13px;color: #0000FF;text-decoration: underline; } 
</style><p class="p_CC664AAA"><span class="s_AA239A9B">Tests, and recent avalanches in the region, continue to show that a layer down 75 to 100 is </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/RB4%28WB%29%20dn%2075cm.JPG" target="_blank"><span class="s_9255B882">triggerable by light loads</span></a><span class="s_AA239A9B"> (that's you). If triggered this layer is</span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/957537630962893/?type=2&amp;theater" target="_blank"><span class="s_9255B882"> likely to propagate</span></a><span class="s_AA239A9B"> into large avalanches. This layer is of most concern on solar aspects.
Buried crusts are creating persistent instabilities on solar aspects.  Storm snow sits on a crust down 30-50cm. February crust is down 80-120cm and still has surface hoar crystals on top in some places. Locate and test these layers before committing.
Buried crusts and associated weak layers have created persistent instabilities on solar aspects.  Recent storm snow sits on top of crusts 30-50cm down.  Feb 27 interface down 80-120cm still producing sudden planar results.  Take the time to evaluate.
Buried crusts and associated weak layers have created persistent instabilities on solar aspects. Recent storm snow sits on top of crusts 30-50cm down. Feb 27 interface down 80-120cm still producing sudden planar results. Take the time to evaluate.
Buried crusts and associated weak layers have created persistent instabilities on solar aspects. Recent storm snow sits on top of crusts 30-50cm down. Feb 27 interface down 80-120cm still producing sudden planar results. Take the time to evaluate.
Buried crusts have created persistent instabilities on solar aspects. Recent storm snow sits on top of crusts 30-50cm down. The crust of most concern is the Feb 27 interface down 70-120cm, which is still producing sudden planar results.
Buried crusts have created persistent instabilities on solar aspects. The crust of most concern is the Feb 27 interface down 70-120cm, which is still producing sudden planar results.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
A series of crusts on solar aspects, buried up to 1.2 m deep, remain a concern. Tests generally take a hard force but continue to produce sudden planar results. This suggests that smaller avalanches, or cornice failures, may trigger large avalanches.
Intense solar and warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Intense solar and warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Intense solar and warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Warm temps could wake up deeply buried weak layers. Recent tests on these crusts indicate that they will likely take a heavy trigger like a cornice fall or another avalanche, but if triggered very large avalanches are possible.
Step-down avalanche potential exists with the many crusts buried in the upper metre. Tests on these crusts indicate that it will likely take a heavy load to trigger them, like a cornice fall or another avalanche. Expect large avalanches if they move!
Step-down avalanche potential exists with the many crusts buried in the upper metre, especially on solar aspects. It will take a heavy load to trigger them, like a cornice fall or another avalanche. Expect large avalanches if they move!
A crust buried up to 1m deep may become increasingly reactive over the weekend and be hard to predict. Test results show variability: in some areas it is unreactive and in others it may be triggered by light loads (you!) and produce large avalanches.
Forecast snow and wind might make a crust buried up to 1m deep more reactive and unpredictable. Test results show variability: in some areas it is unreactive and in others it may be triggered by light loads (you!) and produce large avalanches.
Storm snow loading on top of the persistent slab/Nov crust could make this deep slab more reactive. Field tests so far show variability with areas that are unreactive and others where light loads may trigger slides on this layer.
The snow from the past week has been slow to form a slab in part due to continued cool temperatures and little wind. Slab properties are now starting to form and this is a concern, given the poor bond to the Dec 18th facet layer down 50-60cm.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The weak, facetted snow from the cold snap in early December is now buried ~70-100cm. The slab over this layer is developing, and as the load on this layer grows it may become increasingly reactive.
Persistent slabs are most volatile near ridge crest, shallow areas and lee features. Down flow winds in the Sir Don Range have been observed. This layer overlies a variety of interfaces from surface facets to wind slabs.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm.  Before last week's storm it was giving easy sudden planar results and was reactive to human triggering.  If the storm slab releases it has the potential to step down to this deeper weak layer.
The January 25th sun crust, weak layer is buried down approx 60cm.  Before last week's storm it was giving easy sudden planar results and was reactive to human triggering.  Warming surface layers may reawaken this layer today.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests have been finding isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests show isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests show isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Tests show isolated sudden planar results, making them hard to predict. Be cautious in shallow snowpack areas (ridge-crests) where triggering is more likely.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Tests show isolated sudden planar results, making them hard to predict. Be cautious in shallow snowpack areas (ridge-crests) where triggering is more likely.
Weak layers in the top meter include sun crusts on S'ly aspects and pockets of surface hoar on N'ly aspects. Field tests show isolated sudden planar results, making the weak layers hard to predict. Be careful in thin snowpack locations.
A crust buried last Sunday could act as a bed surface, if slab properties are enabled with daytime heating on solar aspects. Loose dry avalanches are also possible.
Buried crusts on solar aspects are hidden under the march snow. A snow profile yesterday on a south aspect showed the storm snow bonding to the crust, however skiers were able to trigger slab avalanches on this layer earlier in the week.
Buried crusts on solar aspects are hidden under the march snow. Skiers were able to trigger slab avalanches on this layer earlier in the week and yesterday.
Buried crusts on South and West aspects are hidden under the march snow. Skiers were able to trigger slab avalanches on this layer earlier in the week.&nbsp; Take time to assess the how the snow is bonding when moving onto solar aspects
Buried crusts on South and West aspects are hidden under the March snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Recent storm snow has a high potential to dig down and trigger these deeper slabs.
Buried crusts on South and West aspects are hidden under the March snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Recent storm snow has a high potential to dig down and trigger these deeper slabs.
Buried crusts on solar aspects are hidden under our recent storm snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Avalanches triggered in the storm snow have a high probability to overload this layer.
Several persistent weak layers are in the upper snowpack. There is step down potential for storm slab releases to dig down to these layers resulting in large dangerous avalanches.
Rain soaked snow yesterday will have penetrated deep into the snowpack, lubricating the deeper persistent layers of concern. As the storm slabs fail above these layers it will easily step down to the Feb 28th interface and deeper.
Persistent deep layers made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down weak layers from late February.
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</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down to weak layers from late February.
Arial';font-style: Normal;font-weight: normal;font-size: 13px;color: #000000; } 
</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down to weak layers from late February, or deeper in shallow areas.
Arial';font-style: Normal;font-weight: normal;font-size: 13px;color: #000000; } 
</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface slabs fail, avalanches can easily step down to weak layers from late February, or deeper in shallow areas.
It is an impressive and humbling time to be traveling in the back-country. Very large avalanches have been occurring, even logging mature timber. The scary thing is, these large avalanches continue to occur sporadically and are very hard to predict.
It is an impressive and humbling time to be traveling in the back-country. Very large avalanches have been occurring, even logging mature timber. These large avalanches continue to occur sporadically and are very hard to predict.
The month of March has been characterized by heavy loading of new snow and rain. These events have created an instable snowpack that is verging on a tipping point. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain.  After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain. After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain. After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
Soft slabs overlie a series of strong crusts in most areas. As freezing levels rise this slab is expected to be increasingly reactive. These slabs will be deepest in areas that have been wind-loaded.
Cornices dropping and smaller avalanches have recently triggered deep, persistent weak layers. The resulting avalanches have been observed to run well into the valley bottoms. With continued loading during the storm likelihood will increase.
Cornices dropping and smaller avalanches have recently triggered deep, persistent weak layers. The resulting avalanches have been observed to run well into the valley bottoms. With continued loading during the storm likelihood will increase.
Cornices and smaller avalanches have recently triggered deep, persistent weak layers. The resulting avalanches have been observed to run well into the valley bottoms. With daytime warming, the likelihood will increase.
Storm slabs are most volatile where they overlie a crust on solar aspects. 50+cm of new snow accompanied by warm temperatures and wind fell over the last week in the alpine and upper end of tree line.
There are multiple crusts in the upper metre of the snowpack, each providing a smooth sliding layer if avalanches dig down and trigger the deeper layers. Solar aspects are the biggest concern with day-time warming and a powerful April sun.
The Halloween Crust layer is buried down approximately 70 cms, with the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does the resulting avalanches would be large!
The Halloween Crust layer is buried down approximately 90cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does &quot;wake up&quot; the resulting avalanches would be large!
The Halloween Crust layer is buried down approximately 100cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does &quot;wake up&quot; the resulting avalanches would be large!
The Halloween crust, while stubborn is active given the right location.  This layer can be found down approx 100cm and is a developing problem.
Warm temperatures and continued loading should be enough to awaken the Oct 31st crust over the next 48hrs. The question is timing which may be later today or into Thursday morning.
Rain penetrating the upper snowpack can percolate down to the halloween crust, awakening this layer.
This layer was awakened by heavy loading during the last storm. Although natural avalanche activity has subsided, this crust remains a concern due to its persistent nature in the snowpack. Human triggering is certainly possible.
Recent storm snow is shifting into a settled persistent slab. Expect the slab to be increasingly sensitivity as you transition into wind effected terrain. Steeper solar slopes harbor a thin crust layer below slab and a facet surface hoar combo BTL.
Recent storm snow is settling into a persistent slab. Expect the slab to be increasingly sensitivity as you transition into steep and/or wind effected terrain. Solar aspects harbor a thin crust layer below the slab and a facet surface hoar combo BTL.
Recent storm snow is settling into a persistent slab. Expect the slab to be more sensitive as you transition into steep and/or wind effected terrain.&nbsp; South and West aspects have a thin crust layer below the slab and a facet/surface hoar combo BTL.
Recent storm snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more sensitive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
40-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
30-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
30-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
40cm+ of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to possibly be reactive on steep unsupported and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but a warming trend may make it more reactive especially on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but today's warming trend may make it more reactive especially on steep unsupported terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion, limiting natural and skier triggered avalanches so far.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion however this is expected to change with the warming trend.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion; however, this is expected to change as temperatures rise and new snow load is added.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion; however, this could change as temperatures rise and new snow load is added.
The Dec 15 and Dec 27 surface hoar layers are widespread around tree line and buried ~60cm and ~30cm respectively. Warmer temps have promoted settlement of the upper snow pack, these layers may become reactive with additional load.
The Dec 15 and Dec 27 surface hoar layers are widespread around tree line and buried ~80cm and ~50cm respectively. Warmer temps have promoted settlement of the upper snow pack, these layers may become reactive with the recent storm snow.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~80cm. New snow and warm temps have slabbed up the upper snow pack! This interface became reactive yesterday, burying one skier in a terrain trap.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~80cm. New snow and warm temps have slabbed up the upper snow pack! This interface became reactive Monday, burying one skier in a terrain trap.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~100cm. Previous warm temps have slabbed up the upper snow pack. This interface is reactive with skier remote slides Wednesday and a skier buried in a terrain trap on Monday.
This interface has become reactive with the recent new snow loading. It is most prevalent around treeline or on sheltered slopes the alpine. These avalanches are especially dangerous in terrain trap features where debris can pile up quickly.
This interface has become reactive with the recent new loading and is most prevalent around treeline or sheltered areas the alpine. These avalanches are especially dangerous in terrain traps where debris can pile up.
This interface has become reactive with the recent new loading and is most prevalent around treeline or sheltered areas the alpine. These avalanches are especially dangerous in terrain traps where debris can pile up.
The Jan 4th and Dec 15 surface hoar layers are widespread around tree line and below, buried ~60cm and ~90cm respectively. The forecasted warm temps will further slab up the upper snow pack and avalanche activity is expected throughout the day. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The Jan 4 and Dec 15 surface hoar layers are down ~60cm and ~90cm respectively. These layers are widespread at treeline. A receding weak temp inversion and mainly cloudy conditions should reduce reactivity compared to recent days.
The Jan 4 and Dec 15 surface hoar layers are down ~65cm and ~95cm respectively. These layers are widespread at treeline. 10cm storm snow in the last 24hrs will add load to the slab over these weak layers.
The Jan 4 and Dec 15 surface hoar layers are down ~70cm and ~100cm respectively. These layers are widespread at treeline. 20cm storm snow in the last 24hrs will add load to the slab over these weak layers.
The Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. Daily snowfalls add up. This incremental loading can increase the sensitivity of deep layers that may be forgotten, but not gone.
The January 4th surface hoar is down 60cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be more sensitive in thin areas.
The January 4th surface hoar is down 60cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be more sensitive in thin areas.
The January 4th surface hoar is down 70cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be sensitive in thin areas.
We are now in a lower likelihood/very high consequence scenario with the January 4th and the Dec 15th surface hoar layers. These layers should not be overlooked and could be sensitive to thin areas.
We are now in a lower likelihood/very high consequence scenario with the January 4th and the Dec 15th surface hoar layers. These layers should not be overlooked and could be sensitive to human triggering in thin areas.
Persistent weak layers present a lower likelihood/very high consequence scenario with the January 4th and the Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from storm slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th and Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from storm slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th and Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from wind slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th and Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from wind slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th &amp;Dec 15th surface hoar layers buried deep. These layers could be overloaded and reach their tipping point with today's warming and heavy snowfall
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th &amp;Dec 15th surface hoar layers buried deep. These layers have woke up again resulting in large avalanches in the last 24hrs.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th &amp;Dec 15th surface hoar layers buried deep. Triggered storm slabs may overload these layers resulting in large avalanches.
Natural avalanche activity on the persistent weak layers has dropped off. The Jan 16th, 4th &amp;Dec 15th surface hoar layers  are buried deep. Large triggers such as cornice fall or storm slabs may overload these layers.
Natural avalanche activity will increase today with forecasted new snow and ongoing winds. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can certainly step down and trigger these weak interfaces.
Natural avalanche activity will increase today with forecasted new snow and ongoing winds. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
The Jan 16th, 4th and Dec 15th surface hoar layers have been quiet recently but may reawaken given a large trigger such as a storm slab avalanche or cornice fall.
The Jan 16th, 4th and Dec 15th surface hoar layers have been quiet recently but may reawaken given a large trigger such as a storm slab avalanche or cornice fall.
Several deeply buried persistent weak layers are primed for natural and skier triggering with the new storm load. These slides have the potential to reach the full extent of their run-out zones. Mature timber may not be a default safe spot today.
Several deeply buried persistent weak layers have become reactive with the new snow load. If these layers are triggered the resulting avalanches will have the potential to reach the full extent of their run-out zones, possibly even further.
Deeply buried persistent weak layers were reactive in the recent avalanche cycle. Larger loads such as storm slab or cornice fall may trigger these layers. Resulting avalanches will have the potential to reach the full extent of their run-out zones.
Back into lower probability but high consequence of a large avalanche if triggered with the PWL. Large loads such as wind slab or cornice fall may trigger these layers. Resulting avalanches will be large and may reach the end of their run-out zones.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms we've seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms we've seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
Persistent weak layers continue to linger and may be susceptible to human triggering in shallow areas. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
Persistent weak layers continue to linger and are most likely triggered in steep, shallow, rocky, unsupported terrain features. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
Persistent weak layers continue to linger and are most likely triggered in steep, shallow, rocky, unsupported terrain features. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
Persistent weak layers continue to linger and are most likely triggered in steep, shallow, rocky, unsupported terrain features. Large triggers such as cornice fall may also wake up these deeper weak layers resulting in large avalanches.
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This layer has the potential to be human triggered with wide propagation.
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This is a bad combo of a weak layer and strong bed surface. This layer has the potential to be human triggered with wide propagation. Dig down and have a look for it.
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This is a bad combo of a weak layer and strong bed surface. This layer has the potential to be human triggered with wide propagation. Dig down and have a look for it.
A suncrust is buried 40-70 cms on solar aspects. This layer has the potential for human triggering, dig down and assess the snowpack before committing to your line.
Suncrusts are buried 20-50 cms on steep solar aspects. This layer has the potential for human triggering, dig down and assess the snowpack before committing to your line.
Several sun crusts are buried within the top 50 cms on steep solar aspects. These layers have the potential for human triggering, dig down and assess the snowpack before committing to the line.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for storm snow avalanches to trigger this lingering problem.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for smaller avalanches to trigger this lingering problem.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for smaller avalanches to trigger this lingering problem.
Sun crusts are buried 30-60 cm on steep solar aspects. This interface provides a smooth bed surface and may contribute to larger than expected avalanches. It is possible for smaller avalanches to trigger this lingering problem.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer was whumphing and tests showed potential for wide propagation if this layer is triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer was whumphing and tests showed potential for wide propagation if this layer is triggered. Avoid convexities and thin snowpack areas on solar aspects.
70-90cm of settled snow sits on the mid March crust/facet combo. In recent tests this layer fails suddenly and has showed potential for wide propagation if triggered. Avoid convexities and thin snowpack areas on solar aspects.
70-90cm of settled snow sits on the mid March crust/facet combo. In recent tests this layer fails suddenly and has showed potential for wide propagation if triggered. Avoid convexities and thin snowpack areas on solar aspects.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On solar aspects, this layer fails suddenly in stability tests and has shown potential for wide propagation if triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On solar aspects, this layer fails suddenly in stability tests and has shown potential for wide propagation if triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On solar aspects, this layer fails suddenly in stability tests and has shown potential for wide propagation if triggered.
70-90cm of settled snow sits on the mid March crust/facet combo. This layer appears to be bonding well on polar aspects. On S'ly aspects, this layer fails suddenly in stability tests. Continued warming and overloading may cause this layer to fail.
70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the mod-hard range in stability tests on solar aspects. This layer might become more active with the incoming snow/rain and rising temperatures.
70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the moderate-hard range in stability tests on solar aspects.
A persistent weak layer down 50 to 70cm is reactive to skier triggering.  Our observations suggest the most reactive locations are steep S/SW facing slopes and open glades. Strong south winds may have created harder wind slabs at and above treeline.
A persistent weak layer down 50 to 70cm is reactive to skier triggering. Our observations suggest the most reactive locations are steep S/SW facing slopes and open glades. Strong south winds may have created harder wind slabs at and above treeline.
A cohesive slab overlies a persistent weak layer. Variable distribution and composition makes this layer difficult to predict. Tests on this layer indicate it is skier triggerable and observations indicate it is most reactive on steep S'ly aspects.
A cohesive slab overlies a persistent weak layer. Variable distribution and composition makes this layer difficult to predict. Tests on this layer indicate it is skier triggerable and observations indicate it is most reactive on steep S'ly aspects.
2 layers, down ~40 and ~80cm, exist in isolated areas (see forecast details). They have been reactive to ski cutting on steep unsupported features in Rogers Pass, and in the surrounding region caused several human triggered size 2 avalanches.
A touchy surface hoar layer is down 25-40cm. There have been human triggered avalanches on this layer daily. Avalanches are increasingly possible with new snow and rising winds today adding load, and mild temperatures making the slab more cohesive.
A touchy surface hoar layer is down 35-55cm. Human (even tree bomb) triggered avalanches have occurred daily. Avalanches are increasingly possible with new snow and rising winds today adding load, and mild temperatures making the slab more cohesive.
A touchy surface hoar layer is down ~50cm. Human (even tree bomb) triggered avalanches have occurred daily. Avalanches are increasingly possible with new snow load and mild temperatures making the slab more cohesive.
The Feb 12 PWL is becoming more reactive as it matures.&nbsp; Skier triggered and natural avalanches have been increasing on this layer, with RB scores of 2, whole block.&nbsp; It is most reactive on solar aspects between 17-1900m.
A &quot;persistent weak layer&quot; (Feb 12 SH) is now down 50-60 cm from the surface, and is sporadically reactive to skier triggering.  Wide propagations are possible, especially on sunny aspects where it sits on a sun crust, between 17-1900m.
A &quot;persistent weak layer&quot; (Feb 12 SH) is down 50-60 cm from the surface, and remains sporadically reactive to skier triggering.  Wide propagations are possible, especially on sunny aspects where it sits on a sun crust, between 17-1900m.
A weak layer is down 40-50cm. It is most likely to be skier-triggered around 17-1900m, avoid open slopes and convex rolls. On sunny aspects the weak layer can be touchy.  Natural avalanche activity will increase on this layer today with the new snow.   
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> A weak layer is down 50-70cm. It is most likely to be skier-triggered around 17-1900m, avoid open slopes and convex rolls. On sunny aspects the weak layer can be touchy. See </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://avalancheinfo.net/Parks/Glacier/Images/2013-02-23%20Sz%202%20Sc.jpg" target="_blank"><span class="s_9255B882">image</span></a><span class="s_AA239A9B"> of skier-triggered avalanche yesterday on this layer at 1700m.
A buried surface hoar layer, down 40-50cm, reactive to skier triggering particularly where it sits on a crust on steep south aspects. The overlying slab is stiffening and will produce larger propagation avalanches when triggered.
More load over the surface hoar layer buried 40-55cm. This layer is reactive to rider triggering and remote triggering. The overlying slab will continue to produce avalanches with larger propagation and more consequence for the foreseeable future.
Surface hoar layer buried 40-55cm. This layer is reactive to rider triggering and remote triggering. The overlying slab will continue to produce avalanches with larger propagation and more consequence for the foreseeable future.
Surface hoar layer buried 40-55cm. This layer is reactive to rider triggering and remote triggering and has been seen to be most reactive where the surface hoar is sitting on a sun crust or firm layer in the snowpack (bed-surface).
Surface hoar layer buried 45-60cm. This layer is reactive to rider triggering and remote triggering and has been seen to be most reactive where the surface hoar is sitting on a sun crust or firm layer in the snowpack (bed-surface).
A weak surface hoar layer is now down ~85cm. This layer has been triggered by humans; remotely from 40m away, and capable of wide propagations up to 150m. Rapid loading or other avalanches may trigger this layer and produce very large avalanches.
A weak surface hoar layer is now down ~1m. This layer has been triggered by humans; remotely from 40m away, with propagations up to 150m wide. Rapid loading and other avalanches triggered this layer yesterday producing very large avalanches.
A weak surface hoar layer is now down ~1m. This layer has caused widespread avalanches: natural's up to size 4, and size 2.5 human triggered avalanches. In areas where it hasn't already avalanched it is very reactive, and has been remotely triggered.
A weak surface hoar layer is now down ~1m. This layer has caused widespread avalanches: natural's up to size 4, and size 2.5 human triggered avalanches. In areas where it hasn't already avalanched it is very reactive, and has been remotely triggered.
A weak surface hoar layer is now down ~1m. This layer has caused widespread avalanches: natural's up to size 4, and size 2.5 human triggered avalanches. In areas where it has not already avalanched it remains touchy, and has been remotely triggered.
The Feb 12 PWL continues to be a concern. During the last storm cycle several avalanches &quot;stepped&quot; down to this layer.  It will remain a problem for some time.
The Feb 12 PWL continues to be a concern. During the last storm cycle several avalanches &quot;stepped&quot; down to this layer. It will remain a problem for some time.
The Feb 12 PWL continues to be a concern. During the last storm cycle several avalanches &quot;stepped&quot; down to this layer. It will remain a problem for some time.
The surface hoar/crust layer from February is becoming less reactive; a function of it now being 1-1.5m deep and having avalanched in many areas. It is most likely to be triggered on solar aspects or by heavy triggers, resulting in large avalanches.
The surface hoar/crust layer from February is becoming less reactive; a function of it now being 1-1.5m deep and having avalanched in many areas. It is most likely to be triggered on solar aspects or by heavy triggers, resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered on solar aspects from shallow areas or from large triggers such as cornice falls resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered on solar aspects from shallow areas or from large triggers such as cornice falls resulting in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
The surface hoar/crust layer from February is most likely to be triggered by large triggers such as avalanches triggered in shallower layers in the snowpack and cornice falls which will result in large avalanches.
It will likely take a large trigger, like a cornice fall or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. If triggered, however, the resulting avalanche would be very large and destructive.
It will likely take a large trigger, like a cornice fall or another avalanche to trigger the surface hoar/crust layer from February down 1-1.5m. If triggered, however, the resulting avalanche would be very large and destructive.
It will likely take a large trigger, like a cornice or another avalanche to trigger the surface hoar/crust layer from February 12, now down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
It will likely take a large trigger, like a cornice or another avalanche to trigger the surface hoar/crust layer from February 12, now down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
It will likely take a large trigger, like a cornice or another avalanche to trigger the  Feb 12 and March 11 PWL's, now down 1-1.5m. The resulting avalanche would be very large and destructive if triggered.
Two weak layers are buried down 1-1.5m.  Though unlikely, a large trigger like a cornice or another avalanche may cause these weak layers to fail. 
Two weak layers are buried down 1-1.5m. Though unlikely, a large trigger like a cornice or another avalanche may cause these weak layers to fail.
Slopes receiving direct sun become more reactive during the day with warming. This is especially likely on steep solar aspects where buried crusts exist. Solar triggered avalanches are most likely around exposed rocks and may trigger deeper slabs.
Slopes receiving direct sun become more reactive during the day with warming. This is especially likely on steep solar aspects where buried crusts exist. Solar triggered avalanches are most likely around exposed rocks and may trigger deeper slabs.
PWL's are becoming stubborn, but should not be discounted.  Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist, but northerly aspects are not immune.
PWL's are becoming stubborn, but should not be discounted.  Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist, but northerly aspects are not immune.
Buried weak layers are stubborn to fail, but should not be discounted. Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist.
Buried weak layers are stubborn to fail, but should not be discounted. Slopes receiving direct sun become more reactive during the day with warming. This is most likely on steep solar aspects where buried crusts exist.
The recent snow has tightened up into a slab. It sits on various weak crystals, like facets or surface hoar, that may be triggered by skiers. If triggered, avalanches may step down to deeper surface hoar layers resulting in very large avalanches.
The recent snow has tightened into a slab. It sits on various weak crystals, like surface hoar and facets, that can be triggered by people. These avalanches may step down to deeper surface hoar layers, resulting in large avalanches.
A weak layer is buried down around 80 cm.&nbsp; If triggered, a large, high consequence avalanche will result. Carefully evaluate big terrain features by digging and testing adjacent, safe slopes.
A weak layer is buried down 60 to 90 cm. If triggered, a large high consequence avalanche will result. Carefully evaluate big terrain features by digging and testing adjacent, safe slopes.
2 weak layers exist in the snowpack, these are down between 70 and 110cm. They could become reactive with this additional snow load having very large consequences if triggered.
2 weak layers exist in the snowpack, these are getting deeper as snow amounts increase. They are down between 70 and 120cm and will have devastating consequences if triggered.
The interface between the December snow and the facetted November snow, down ~80cm is the biggest concern. Although this interface is becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Persistent weak layers down ~80cm (facets), and down ~115cm (surface hoar) continue to be reactive in specific locations. Although these interfaces are becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Persistent weak layers down ~80cm (facets), and down ~115cm (surface hoar) continue to be reactive in specific locations. Although these interfaces are becoming less likely to trigger it is possible, or smaller avalanches may step down to this layer.
Weak layers are buried down 80 to 100 cm. In a shallow snowpack where the weak layer is well-preserved, a skier could fail these layers.
The 2 buried weak layers down 70 to 110cm are still producing results in our snowpack tests. Caution around shallow snow pack areas where triggering these layers is most likely.
2 buried weak layers down 70 to 110cm remain a concern for riders. Consequences would be large if triggered which is more likely from shallow snowpack areas.
The presence of buried surface hoar remains a concern for backcountry riders. The potential for a large avalanche on this layer still exists.
The presence of a deep surface-hoar weakness remains a concern for backcountry travelers. It will likely take a large load to trigger it, like a cornice or someone who ate too many perogies over Christmas.
A deep persistent weakness lingers, down roughly 120cm. It will take a large trigger to initiate this layer, but if it starts to move, propagation would likely be wide and deep, creating a larger avalanche.
The heavy trigger may have arrived with this latest dump. Large avalanches are occurring, and may be stepping-down to this deeper layer.
This problem is becoming increasingly challenging. The clues of instability, like cracking and whumphing are tapering off, but tests and continued avalanches indicate that this thick slab is triggerable and will produce very large avalanches.
A strong slab overlies a very weak layer buried down 1-1.5m. The snowpack now demands your respect, if you trigger this layer a large, high consequence avalanche will result.&nbsp; Use caution in shallow snowpacks, where triggering is more likely.
A strong slab overlies a very weak layer buried down 1-1.5m. The snowpack now demands your respect, if you trigger this layer a large, high consequence avalanche will result.&nbsp; Use caution in shallow snowpacks, where triggering is more likely.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> </span><span class="s_E6FD2046">The slab overtop the weak layers down 1-1.5m continues to settle and become more cohesive. This problem will take a while to heal and requires good terrain management. Be particularly weary of open unsupported slopes and convex rolls below tree line.
The 1-1.5m slab over the weak layers continues to settle and become more cohesive. This problem will take a while to heal and requires good terrain management. Be wary of open, unsupported slopes and convex rolls, particularly at tree-line and below.
The 1-1.5m slab overlying the Feb 10th weak layer is slowly bonding to this interface, but is still reactive in tests. This problem requires good terrain management, such as avoiding large convexities and sticking to supported features.
A weak, persistent layer is buried under a thick slab. This layer is becoming more difficult to trigger, but if triggered will propagate widely producing a very large avalanche. Choosing appropriate terrain is key in managing this problem.
As this weak layer, buried down around 1 m, gains strength human triggered avalanches are still possible. Areas of concern are open, unsupported slopes, convex terrain and thin snowpack areas.
As this weak layer, buried down around 1 m, gains strength human triggered avalanches are still possible. Areas of concern are open, unsupported slopes, convex terrain and thin snowpack areas.
The sun crust/surface hoar layer down 1-1.5m is still producing hard sudden results in snowpack tests. This indicates that the layer is difficult to trigger but will propagate widely if it does.
The suncrust/surface hoar layer down 1-1.4m is still producing hard, sudden results in snowpack tests. This indicates it is stubborn to trigger, but if initiated, it will propagate widely, producing large avalanches.
Lingering deep (1-1.4m) in the snowpack, the surface hoar/facet/crust sandwich continues to produce hard, sudden results in tests. If a large enough trigger gets this layer to fail, avalanches will be very large.
The facet/crust &quot;sandwich&quot; is buried 120-150cm below the surface now. It is still producing hard, sudden results in tests, indicating that it can will propagate if a large enough trigger hits it. Avalanches digging into this layer will be large!
This last storm, and the forecast dump of snow this weekend, may wake a weak persistent layer up. This layer, buried ~1.5m deep, is still reactive in snowpack tests and if triggered will produce very large and destructive avalanches.
A deep weak layer buried at the end of January is down around 1.5 m. Although we have not observed any recent skier-triggering of this layer, artillery control triggered this layer on the west side of the park, releasing a size 3.5.
A deep weak layer buried at the end of January is down 1.8 to 2 m.&nbsp; Smaller avalanches could step down and trigger as large, high consequence avalanche on this layer.
A sun crust down ~1m is well within the range of human triggering on south and west aspects. The February surface hoar/crust layer down ~1.5-2m which can reawaken with a heavy trigger such as a large cornice release.
A weak layer down 20-30 cm is still reactive to skier-triggering. Use caution on unsupported features and convex terrain. Watch for changing conditions as temperatures warm up today and surface crusts deteriorate.
more reactive on solar aspects.
We may see the deeper instabilities reawaken with the warm temperatures, and possibly rain, moving into the snowpack. Try to avoid shallow, thin areas where a person could trigger a deeper weakness.
Be aware that step down avalanches are possible if storm slabs or wind slabs are triggered in wind loaded areas.
The large size 3.5 from Moccasin Flats 36 hours ago shows the persistent slabs have not gone away. Larger triggers, like cornices or surface avalanches, may step down to deeper layers.
Without a good refreeze, there is less structure to the snowpack to prevent it from stepping down into the lower persistent weaknesses. The large size 3.5 from Moccasin Flats 2 days ago illustrates the potential destructive force lingering out there.
Trigger points for the persistent weak layers buried down ~1m and ~1.3m include steep alpine terrain, thin areas, and unsupported open slopes.&nbsp; Once initiated avalanches triggered in the storm snow may step down to the deep persistent weak layers.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Rider triggered and remote avalanches are happening daily on a widespread surface hoar layer down ~50cm. The overlying slab has gained enough strength to propagate widely which means bigger consequences. This problem will persist for a while.
A touchy surface hoar layer continues to be reactive. Avalanches continue to be triggered, even in areas that have been heavily traveled. Some areas offer no clues of instability, but the potential for large avalanches exist.
A touchy surface hoar layer continues to be reactive. Avalanches continue to be triggered, even in areas that have been heavily traveled. Some areas offer no clues of instability, but the potential for large avalanches exist.
The December 17th surface hoar layer is still reactive.  Avalanches continue to be triggered even in locations previously skied. Some areas offer few clues of the instability but the potential for large avalanches continues.
The December 17th surface hoar layer is still reactive. Avalanches continue to be triggered even in locations previously skied. Some areas offer few clues of the instability but the potential for large avalanches continues.
The Dec17th surface hoar is still reactive, with most events at treeline. A size 2 skier-controlled avalanche released on this layer yesterday. Buried surface hoar requires careful decision making, especially as more new snow continues to fall.
The Dec17th surface hoar is still reactive, particularly at treeline. As new snow continues to fall the consequences of an avalanche on this layer increase, careful decision making is still necessary.
The Dec17 surface hoar is most reactive at treeline. As snow load continues the consequences of an avalanche on this layer increase, careful decision making is still necessary. We suspect yesterdays Teddy Bear Trees avalanche to be on this layer.
The December 17th surface hoar layer is still a real concern in the snowpack.  The significant storm snow load should be increasing the probability of triggering this deeper weak layer.  This layer is most prevalent at treeline elevations.
The December 17th layer produced our larger controlled slides yesterday.  Slides initiating in the storm snow have a good probability of overloading this layer as they gain volume.  This layer is most prevalent at treeline elevations.
The Dec 17 instability is still active. Yesterday a field team triggered a sz 1.5 on a convex roll at treeline that had previously released and since reloaded. This layer is widespread at treeline and should not be forgotten during decision making.
A 60cm+ thick cohesive slab now overlies a very touchy surface hoar layer. Tests indicate that it is likely to propagate if triggered, and avalanches have been remotely triggered from up to 300m away.
A 60cm+ thick cohesive slab now overlies a touchy surface hoar layer. Tests indicate that it may be triggered by light loads (ie you) and likely to propagate widely as the slab stiffens. Avalanches have been remotely triggered from up to 300m away.
A 60cm+ thick cohesive slab now overlies a touchy surface hoar layer. Tests indicate that it may be triggered by human loads and likely to propagate widely as the slab stiffens. Avalanches have been remotely triggered from up to 300m away.
Although this surface hoar layer is now buried 70-100cm deep, it will be easily triggered today with addition of the new snow load. Stability tests show that this layer has good propagation potential, making large avalanches likely.
Mid January surface hoar layer is now buried 60-100cm deep. This layer is likely to become more reactive with the current warm conditions and rain we are receiving. 
Mid January surface hoar layer is now buried 60-100cm deep. This layer is becoming more reactive with the current warm conditions and rain we are receiving.
Natural and artillery triggered avalanches continue to fail on the Jan.15 surface hoar layer, now buried 60-100cm deep. This layer continues to propagate widely into very large avalanches. Avalanches may step down to a deeper layer from mid Dec.
Recent avalanches have been failing on the Jan.15 surface hoar layer, now buried 60-100cm deep. Some avalanches have stepped down to a deeper layer from mid Dec.
Jan 15 surface hoar layer is buried 60-100cm deep. This interface remains reactive due to large, poorly bonded surface hoar crystals.  Avalanches from large triggers such as cornice fall might step down to a deeper layer from Dec 17.
Jan 15 layer is buried 60-100cm deep. This layer remains a concern due to large, poorly bonded surface hoar crystals.  As snow continues to settle, this layer will require larger triggers to initiate. Cornice failures could step down to deep layers.
Jan 15 layer is buried 60-100cm deep. This layer remains a concern due to surface hoar crystals. As snow continues to settle, this layer will require larger triggers to initiate. This layer could be triggered by heavy loads or from shallow areas.
Continued warm precipitation has been enough to begin to overload the various persistent instabilities in our snowpack. A series of weak layers in the top 1.5m of snowpack should be considered triggerable by back country riders.
A 70-90cm slab sits on a suncrust on steep solar aspects and preserved surface hoar at and below treeline. This slab is well formed in areas influenced by strong winds. This layer is becoming less reactive in tests, but remains triggerable by skiers.
80-100cm of storm slab sits on top of the Dec 2 persistent weak layer. This layer is in the form of surface hoar at and below treeline and suncrust on solar aspects in the alpine. The layer is producing hard results on field tests yesterday at 2100m.
80-100cm of  settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and suncrust on solar aspects treeline to alpine. The layer is producing moderate-hard results on field tests yesterday at 2000m.
80-100cm of settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
80-100cm of settled snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
Varying depths of settled snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below tree line and sun crust on solar aspects tree line to alpine. The layer has produced moderate-hard results in field tests.
80cm of snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and sun crust on solar aspects. Although this layer is becoming less reactive, it is still producing sudden results in stability tests.
80cm of snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and sun crust on solar aspects. Although this layer is becoming less reactive, it may awaken with ongoing incremental snow loading.
80cm+ of settled snow sits on top of the Dec 2nd interface.  This interface consists of surface hoar at and below treeline and suncrust on steeper solar aspects in the alpine.
80cm+ settled snow sits on top of the Dec 2nd interface. This layer consists of decomposing surface hoar at and below treeline and suncrusts on steep solar aspects in the alpine.
80cm+ settled snow sits on top of the Dec 2nd interface. This layer consists of decomposing surface hoar at and below tree line and sun crusts on steep solar aspects in the alpine.
Below the light surface snow a soft slab sits on a touchy layer (see details tab). This layer is variable and hard to predict. It has been easily triggered where a sun crust is buried, but may also become more reactive at lower elevations.
The incoming storm has the potential to add significant load to a variable and hard to predict weak layer (see details tab).&nbsp; It has been easily triggered where a sun crust is buried, but is also expected to become more reactive at lower elevations.
The storm is upon us with 15cm snow overnight and another 20cm expected today.  Overloading and failure of the soft slab over the Jan 4th weak layer is expected today resulting in an avalanche cycle.
The Jan 4th interface and associated slab were very reactive yesterday. Expect less natural avalanche activity today but continued elevated sensitivity to human triggering on this layer.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. If storm slabs are triggered the load may be sufficient to wake the Jan 4th up.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. If storm slabs are triggered the load may be sufficient to wake the Jan 4th up.
The January 4th interface is getting deep enough in the snowpack to be less reactive to skier loads. Triggered wind slabs, or larger loads like a group of skiers, may be sufficient to wake the Jan 4th up.
The January 4th interface is buried 50-80cm deep; still within range of being triggered by a person. The incremental loading of smaller storms onto this interface makes it a tricky one to predict when/if it will fail.
Incremental loading by a series of storms is making a weak layer down 50-80cm an increasing concern. This layer lingers in many areas and is sporadically reactive, making it tricky to assess. When it fails, however, large avalanches are the result.
A surface hoar layer now down 60-100cm is likely to be touchy after being overloaded by the storm. This layer lingers in many areas and is sporadically reactive, making it tricky to assess. When it fails, however, large avalanches are the result.
A surface hoar layer now down 60-100cm is likely to be touchy after being overloaded by the storm. This layer lingers in many areas and is sporadically reactive, making it tricky to assess. When it fails, however, large avalanches are the result.
The January 4th interface was recently rapidly overloaded.  This layer is tricky to assess as it is not evenly distributed on the landscape.  It is also only sporadically reactive.  It can be found in many locations 60-100cm down in the snowpack.
The January 4th interface was rapidly overloaded &amp; woke up during last weeks storm. This layer is tricky to assess as it is not evenly distributed on the landscape &amp; sporadically reactive. It can be found in many locations 60-100cm deep.
The Jan 4th interface was rapidly overloaded &amp; woke up during last weeks storm. This layer is tricky to assess as it is not evenly distributed &amp; sporadically reactive. It's down 60-90cm &amp; was still producing whumfs yesterday in the Cannaught drainage
This layer is tricky to assess as it's not evenly distributed &amp; sporadically reactive. It's down 60-90 &amp; was still producing whumfs yesterday in the Cannaught drainage. It may be possible to trigger from a thin area or by a large trigger like cornice
The Jan 4th layer is a lingering concern, and it is a tricky to assess. Where it exists it is down 60-90cm, but it is not evenly distributed &amp; is sporadically reactive. It has been triggered recently by cornices, resulting in large avalanches.
The Jan 4th layer is a lingering concern, and it is a tricky one to assess. Where it exists it is down 80-120cm, but it is not evenly distributed &amp; is sporadically reactive. It has been triggered recently by cornices, resulting in large avalanches.
The Jan 4th layer is a lingering concern down 80-120cm in the snowpack.  it is not evenly distributed and is sporadically reactive.  Added load of storm slabs or cornice fall when triggered may provide sufficient load to wake this layer up.
The Jan 4th interface is a lingering concern.  It can be found down 80-120cm in the snowpack.  It is not evenly distributed and sporadically reactive.  Storm slab failure or cornice fracture may provide the load to wake this layer up.
Feb 10 interface lingers and may become reactive given prolonged sun or added load such as cornice fall or slab avalanche. 
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
Feb 10 interface lingers and is becoming difficult to forecast. In some areas there is surface hoar on a crust which is a good recipe for bad avalanches. It may become reactive given prolonged sun or added load such as cornice fall or slab avalanche
The Feb 10th layer is buried 50-90cm. In some areas there is surface hoar on a crust, creating a dangerous combination. Sensitivity to triggering is variable among terrain features and careful consideration is required. Dig down and test this layer.
The Feb 10th layer is buried 50-90cm. In some areas there is surface hoar on a crust, creating a dangerous combination. Sensitivity to triggering is variable among terrain features and careful consideration is required. Dig down and test this layer.
The Feb 27 crust/ surface hoar layer is down 50-60cm and is producing moderate results in stability tests.&nbsp; When triggered, this layer could propagate into a large avalanche.&nbsp; Dig down and test this layer before committing. It is easy to identify.
The Feb 27 crust/ surface hoar layer is down 60cm and produces sudden results in stability tests. When triggered, this layer could propagate into a large avalanche. With warming temperatures this layer could fail as a moist slab at lower elevations.
The Feb 27 crust/surface hoar layer down 70cm produces sudden results in stability tests.  If triggered this layer could propagate into a large avalanche.  Continued warm temperatures could see this layer failing as a moist slab at lower elevations.
The February 27th interface is now down 70cm and was recently producing sudden planar results on field tests.  If triggered large avalanches could result.  Solar input today could increase this layer's sensitivity.
The February 27th interface is now down 70cm and is producing sporadic sudden planar results on field tests in sheltered areas. If triggered large avalanches could result. Daytime heating and solar input today could increase this layer's sensitivity.
The Feb 27th interface is now down 60cm &amp; is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading and solar input will increase it's sensitivity.
The Feb 27th interface is down 60cm and is producing sudden planar results on a crust on S though W aspects. Test results on NE aspects showed stubborn results. Wind-loading will increase it's sensitivity. Wet slabs below treeline from rain.
The Feb 27th interface is down 80cm and is producing sudden planar results on a crust on S though W aspects and surface hoar in isolated spots. This layer has been active recently, triggered by small wind slab avalanches and cornice falls.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
Feb 27 interface is down 80cm+ and continues to give sudden planar results in field tests. The layer consists of crusts on solar aspects and decomposing surface hoar in isolated locations.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Tests, and recent avalanches in the region, continue to show that a layer down 75 to 100 is </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/RB4%28WB%29%20dn%2075cm.JPG" target="_blank"><span class="s_9255B882">triggerable by light loads</span></a><span class="s_AA239A9B"> (that's you). If triggered this layer is</span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/957537630962893/?type=2&amp;theater" target="_blank"><span class="s_9255B882"> likely to propagate</span></a><span class="s_AA239A9B"> into large avalanches. This layer is of most concern on solar aspects.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Tests, and recent avalanches in the region, continue to show that a layer down 75 to 100 is </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/RB4%28WB%29%20dn%2075cm.JPG" target="_blank"><span class="s_9255B882">triggerable by light loads</span></a><span class="s_AA239A9B"> (that's you). If triggered this layer is</span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/957537630962893/?type=2&amp;theater" target="_blank"><span class="s_9255B882"> likely to propagate</span></a><span class="s_AA239A9B"> into large avalanches. This layer is of most concern on solar aspects.
Buried crusts are creating persistent instabilities on solar aspects.  Storm snow sits on a crust down 30-50cm. February crust is down 80-120cm and still has surface hoar crystals on top in some places. Locate and test these layers before committing.
A crust buried up to 1m deep may become increasingly reactive over the weekend and be hard to predict. Test results show variability: in some areas it is unreactive and in others it may be triggered by light loads (you!) and produce large avalanches.
Forecast snow and wind might make a crust buried up to 1m deep more reactive and unpredictable. Test results show variability: in some areas it is unreactive and in others it may be triggered by light loads (you!) and produce large avalanches.
Storm snow loading on top of the persistent slab/Nov crust could make this deep slab more reactive. Field tests so far show variability with areas that are unreactive and others where light loads may trigger slides on this layer.
The snow from the past week has been slow to form a slab in part due to continued cool temperatures and little wind. Slab properties are now starting to form and this is a concern, given the poor bond to the Dec 18th facet layer down 50-60cm.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The weak, facetted snow from the cold snap in early December is now buried ~70-100cm. The slab over this layer is developing, and as the load on this layer grows it may become increasingly reactive.
The Jan 25th sun crust is buried down approx 60cm. Previous to the storm it was whumphing, showing easy sudden results and reactive to human triggering. If the storm slab is triggered it has the potential to step down and trigger this layer.
The Jan 25th sun crust is buried down approx 60cm.  Before last week's storm it was giving easy sudden planar results and was reactive to human triggering.  If the storm slab releases it has the potential to step down to this deeper weak layer.
The January 25th sun crust, weak layer is buried down approx 60cm.  Before last week's storm it was giving easy sudden planar results and was reactive to human triggering.  Warming surface layers may reawaken this layer today.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests have been finding isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests show isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Snowpack tests show isolated sudden planar results, making them hard to predict. With the added load of rain/heavy snow they may be more reactive.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Tests show isolated sudden planar results, making them hard to predict. Be cautious in shallow snowpack areas (ridge-crests) where triggering is more likely.
Weak layers in the top meter include sun crust on solar slopes and pockets of surface hoar. Tests show isolated sudden planar results, making them hard to predict. Be cautious in shallow snowpack areas (ridge-crests) where triggering is more likely.
Buried crusts on solar aspects are hidden under the march snow. A snow profile yesterday on a south aspect showed the storm snow bonding to the crust, however skiers were able to trigger slab avalanches on this layer earlier in the week.
Buried crusts on solar aspects are hidden under the march snow. Skiers were able to trigger slab avalanches on this layer earlier in the week and yesterday.
Buried crusts on South and West aspects are hidden under the march snow. Skiers were able to trigger slab avalanches on this layer earlier in the week.&nbsp; Take time to assess the how the snow is bonding when moving onto solar aspects
Buried crusts on South and West aspects are hidden under the March snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Recent storm snow has a high potential to dig down and trigger these deeper slabs.
Buried crusts on South and West aspects are hidden under the March snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Recent storm snow has a high potential to dig down and trigger these deeper slabs.
Buried crusts on solar aspects are hidden under our recent storm snow. Skiers were able to trigger slab avalanches on this layer earlier in the week. Avalanches triggered in the storm snow have a high probability to overload this layer.
Several persistent weak layers are in the upper snowpack. There is step down potential for storm slab releases to dig down to these layers resulting in large dangerous avalanches.
Rain soaked snow yesterday will have penetrated deep into the snowpack, lubricating the deeper persistent layers of concern. As the storm slabs fail above these layers it will easily step down to the Feb 28th interface and deeper.
Persistent deep layers made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down weak layers from late February.
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</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down to weak layers from late February.
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</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface instabilities fail, avalanches can easily step down to weak layers from late February, or deeper in shallow areas.
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</style><p class="p_CC664AAA"><a href="https://www.facebook.com/ParksMountainSafety/photos/a.1122932427756745.1073741905.145133538869977/1250972184952768/?type=3&amp;theater" target="_blank"><span class="s_9255B882">Persistent deep layers</span></a><span class="s_AA239A9B"> made a triumphant return during our most recent avalanche cycle and they remain a cause for concern. As surface slabs fail, avalanches can easily step down to weak layers from late February, or deeper in shallow areas.
It is an impressive and humbling time to be traveling in the back-country. Very large avalanches have been occurring, even logging mature timber. The scary thing is, these large avalanches continue to occur sporadically and are very hard to predict.
It is an impressive and humbling time to be traveling in the back-country. Very large avalanches have been occurring, even logging mature timber. These large avalanches continue to occur sporadically and are very hard to predict.
The month of March has been characterized by heavy loading of new snow and rain. These events have created an instable snowpack that is verging on a tipping point. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain.  After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain. After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The month of March has been characterized by heavy loading of new snow and rain. After an intense avalanche cycle, the snow pack is still stabilizing. Deep weak layers have been failing sporadically leading to large avalanches.
The Halloween Crust layer is buried down approximately 70 cms, with the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does the resulting avalanches would be large!
The Halloween Crust layer is buried down approximately 90cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does &quot;wake up&quot; the resulting avalanches would be large!
The Halloween Crust layer is buried down approximately 100cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does &quot;wake up&quot; the resulting avalanches would be large!
The Halloween crust, while stubborn is active given the right location.  This layer can be found down approx 100cm and is a developing problem.
Warm temperatures and continued loading should be enough to awaken the Oct 31st crust over the next 48hrs. The question is timing which may be later today or into Thursday morning.
Recent storm snow is shifting into a settled persistent slab. Expect the slab to be increasingly sensitivity as you transition into wind effected terrain. Steeper solar slopes harbor a thin crust layer below slab and a facet surface hoar combo BTL.
Recent storm snow is settling into a persistent slab. Expect the slab to be increasingly sensitivity as you transition into steep and/or wind effected terrain. Solar aspects harbor a thin crust layer below the slab and a facet surface hoar combo BTL.
Recent storm snow is settling into a persistent slab. Expect the slab to be more sensitive as you transition into steep and/or wind effected terrain.&nbsp; South and West aspects have a thin crust layer below the slab and a facet/surface hoar combo BTL.
Recent storm snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more sensitive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
40-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
30-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
30-50cm of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to be more reactive as you transition into steep and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
40cm+ of snow is settling into a persistent slab which sits on the Dec 15 surface hoar. Expect the slab to possibly be reactive on steep unsupported and/or wind effected terrain. Solar aspects have a thin crust layer below the slab.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but it may be reactive on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but a warming trend may make it more reactive especially on steep unsupported and/or wind affected terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from gaining cohesion, but today's warming trend may make it more reactive especially on steep unsupported terrain.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion, limiting natural and skier triggered avalanches so far.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion however this is expected to change with the warming trend.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion; however, this is expected to change as temperatures rise and new snow load is added.
The December 15 surface hoar layer is widespread around treeline and buried 60cm. Cold temps have kept the slab from settling and gaining cohesion; however, this could change as temperatures rise and new snow load is added.
The Dec 15 and Dec 27 surface hoar layers are widespread around tree line and buried ~60cm and ~30cm respectively. Warmer temps have promoted settlement of the upper snow pack, these layers may become reactive with additional load.
The Dec 15 and Dec 27 surface hoar layers are widespread around tree line and buried ~80cm and ~50cm respectively. Warmer temps have promoted settlement of the upper snow pack, these layers may become reactive with the recent storm snow.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~80cm. New snow and warm temps have slabbed up the upper snow pack! This interface became reactive yesterday, burying one skier in a terrain trap.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~80cm. New snow and warm temps have slabbed up the upper snow pack! This interface became reactive Monday, burying one skier in a terrain trap.
The Dec 15th PWL is widespread around tree line and below tree line, buried ~100cm. Previous warm temps have slabbed up the upper snow pack. This interface is reactive with skier remote slides Wednesday and a skier buried in a terrain trap on Monday.
This interface has become reactive with the recent new snow loading. It is most prevalent around treeline or on sheltered slopes the alpine. These avalanches are especially dangerous in terrain trap features where debris can pile up quickly.
This interface has become reactive with the recent new loading and is most prevalent around treeline or sheltered areas the alpine. These avalanches are especially dangerous in terrain traps where debris can pile up.
This interface has become reactive with the recent new loading and is most prevalent around treeline or sheltered areas the alpine. These avalanches are especially dangerous in terrain traps where debris can pile up.
The Jan 4th and Dec 15 surface hoar layers are widespread around tree line and below, buried ~60cm and ~90cm respectively. The forecasted warm temps will further slab up the upper snow pack and avalanche activity is expected throughout the day. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
The Jan 4 and Dec 15 surface hoar layers are down ~60cm and ~90cm respectively. These layers are widespread at treeline. A receding weak temp inversion and mainly cloudy conditions should reduce reactivity compared to recent days.
The Jan 4 and Dec 15 surface hoar layers are down ~65cm and ~95cm respectively. These layers are widespread at treeline. 10cm storm snow in the last 24hrs will add load to the slab over these weak layers.
The Jan 4 and Dec 15 surface hoar layers are down ~70cm and ~100cm respectively. These layers are widespread at treeline. 20cm storm snow in the last 24hrs will add load to the slab over these weak layers.
The Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. Daily snowfalls add up. This incremental loading can increase the sensitivity of deep layers that may be forgotten, but not gone.
The January 4th surface hoar is down 60cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be more sensitive in thin areas.
The January 4th surface hoar is down 60cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be more sensitive in thin areas.
The January 4th surface hoar is down 70cm and the Dec 15th layer is down 100cm. After a month under the snow, this surface hoar remains widespread and well-preserved. These layers should not be overlooked and could be sensitive in thin areas.
We are now in a lower likelihood/very high consequence scenario with the January 4th and the Dec 15th surface hoar layers. These layers should not be overlooked and could be sensitive to thin areas.
We are now in a lower likelihood/very high consequence scenario with the January 4th and the Dec 15th surface hoar layers. These layers should not be overlooked and could be sensitive to human triggering in thin areas.
Persistent weak layers present a lower likelihood/very high consequence scenario with the January 4th and the Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from storm slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th and Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from storm slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th and Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from wind slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th and Dec 15th surface hoar layers. These layers could be sensitive to human triggering in thin areas, or overloads from wind slab avalanches.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th &amp;Dec 15th surface hoar layers buried deep. These layers could be overloaded and reach their tipping point with today's warming and heavy snowfall
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th &amp;Dec 15th surface hoar layers buried deep. These layers have woke up again resulting in large avalanches in the last 24hrs.
Persistent weak layers present a lower likelihood / high consequence scenario with the Jan 16th, 4th &amp;Dec 15th surface hoar layers buried deep. Triggered storm slabs may overload these layers resulting in large avalanches.
Natural avalanche activity on the persistent weak layers has dropped off. The Jan 16th, 4th &amp;Dec 15th surface hoar layers  are buried deep. Large triggers such as cornice fall or storm slabs may overload these layers.
Natural avalanche activity will increase today with forecasted new snow and ongoing winds. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can certainly step down and trigger these weak interfaces.
Natural avalanche activity will increase today with forecasted new snow and ongoing winds. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
Natural avalanche activity on the persistent weak layers has tapered off recently. The Jan 16th, 4th and Dec 15th surface hoar layers are buried deep, but avalanches in the storm snow can step down and trigger these weak interfaces.
The Jan 16th, 4th and Dec 15th surface hoar layers have been quiet recently but may reawaken given a large trigger such as a storm slab avalanche or cornice fall.
The Jan 16th, 4th and Dec 15th surface hoar layers have been quiet recently but may reawaken given a large trigger such as a storm slab avalanche or cornice fall.
Several deeply buried persistent weak layers are primed for natural and skier triggering with the new storm load. These slides have the potential to reach the full extent of their run-out zones. Mature timber may not be a default safe spot today.
Several deeply buried persistent weak layers have become reactive with the new snow load. If these layers are triggered the resulting avalanches will have the potential to reach the full extent of their run-out zones, possibly even further.
Deeply buried persistent weak layers were reactive in the recent avalanche cycle. Larger loads such as storm slab or cornice fall may trigger these layers. Resulting avalanches will have the potential to reach the full extent of their run-out zones.
Back into lower probability but high consequence of a large avalanche if triggered with the PWL. Large loads such as wind slab or cornice fall may trigger these layers. Resulting avalanches will be large and may reach the end of their run-out zones.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms we've seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms we've seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
These slabs will be most susceptible to triggering in shallow areas. This type of instability will linger for a while yet. The significant storms seen recently have overloaded these layers, priming slopes to fail only awaiting a trigger.
Persistent weak layers continue to linger and may be susceptible to human triggering in shallow areas. Larger triggers such as cornice fall may also wake these deeper weak layers resulting in larger avalanches.
70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the mod-hard range in stability tests on solar aspects. This layer might become more active with the incoming snow/rain and rising temperatures.