20 cm of  heavy storm snow has buried a layer of surface hoar, and on southerly aspects a sun crust. With forecast snow and wind over the weekend, this layer will become a concern. It will be easy to trigger and as the slab develops it may propagate.
We've received 40cm of snow in the past 3 days. This soft slab will be most reactive where it buried surface hoar or sun-crust.  We expect more snow and strong winds today, which may overload these layers resulting in natural avalanches.
We've received 60cm of snow in the past 4 days. This soft slab will be most reactive where it buried surface hoar or sun-crust. We expect more snow and strong winds today, which may overload these layers resulting in natural avalanches.
We've received 70cm of snow in the past 4 days. This soft slab will be most reactive where it buried surface hoar or sun-crust. We expect more snow and strong winds today, which may overload these layers resulting in natural avalanches.
We've received 90cm of snow on top of this layer at treeline which has settled into about 65cm of storm slab which will be most reactive where it buried surface hoar or sun-crust.
We've received 100cm of snow on top of this layer at treeline which has settled into about 65cm of storm slab which will be most reactive where it buried surface hoar or sun-crust.
A weak layer down around 65 cm is starting to react less in stability tests. Rider-triggering is still possible.  Use caution on steep slopes facing SW-W in the alpine where a buried thin sun crust identifies the weak layer.
A weak layer down around 65 cm is starting to react less in stability tests.  Rider-triggering is still possible.  Use caution on steep slopes facing SW-W in the alpine where a buried thin sun crust identifies the weak layer.
There has been 72cm of new snow over the last 5 days at treeline. Last nights storm sits over 30 cm very light snow. Conditions are likely to be &quot;heavy over light&quot; increasing the likelihood of skier triggering.
There has been 75cm of new snow over the last 6 days at treeline.  Conditions are likely to be &quot;heavy over light&quot; increasing the likelihood of skier triggering.
23cm of new snow sits over an old snow interface that is not likely to bond quickly. This new snow will add to the sluffing that has been observed over the past week when triggered.
33 cm of new snow sits over variable weak layers such as surface hoar, sun crust or facets, depending on your aspect and elevation. These are ideal  layers for an avalanche to release on.
  Weak layers such as surface hoar, sun crust or facets, depending on your aspect and elevation, are now buried 40 to 60cm deep. These are in the range of skier triggering and wider propagation as the slab settles.
Up to 65cm of storm snow lies on a weak interface of surface hoar and sun crust.  These layers are very reactive to skier triggering.  A widespread avalanche cycle occurred overnight, and avalanche control is planned for today.
Up to 70 cm of storm snow lies on a weak interface of surface hoar and sun crust, burried on January 4.  Avalanche control yesterday produced many avalanches on this layer.  Storm snow will continue to be reactive to skier triggering
30cm of new snow has created storm slabs. These can be triggered by riders especially in steep terrain. Watch for wind effected snow on north/northeast slopes in open areas at treeline and in the alpine. Snow will be sluffing in steep treed terrain.
45cm of new snow has created storm slabs. These can be triggered by riders especially in steep terrain. Watch for wind effected snow on north/northeast slopes in open areas at treeline and in the alpine. Snow will be sluffing in steep treed terrain.
45cm of new snow has created storm slabs. These can be triggered by riders especially in steep, unsupported terrain. Watch for wind effected snow on north/northeast aspects at treeline and in the alpine. Be cautious of sluffing in steep terrain.
Recent storm snow is settling into a more cohesive slab. Watch for wind effect on north/northeast aspects. Surface hoar below 1800m was observed in some drainages now buried down 40cm, this may become more reactive with settlement.
Storm snow continues to settle into a more cohesive slab. 50cm sits on a sun crust on steep south and west aspects and over surface hoar below 1800m. Wind effect on north and east aspects may exist.
Storm snow continues to settle into a more cohesive slab. 50cm sits on a sun crust on steep south and west aspects and over surface hoar below 1800m. Wind effect may exist near ridge tops.
Rising winds overnight and lots of deep soft snow available for wind transport will create storm/wind slabs at treeline and in the alpine. Be aware of soft slab formation in the lee of features at ridgelines. These soft slabs are running end fan. 
Strong winds in the last 24hrs and lots of deep soft snow available for wind transport have created storm/wind slabs at treeline and in the alpine. Be aware of soft slab formation in the lee of features at ridgelines.
Skier triggerable slabs exist throughout the park. Recent strong southerly winds have loaded northerly aspects. Avoid lee and cross-loaded terrain near ridges where the wind has deposited firm snow.  Watch for shooting cracks as a sign of soft slabs.
Skier triggerable slabs exist throughout the park. Recent strong southerly winds have loaded northerly aspects. Avoid lee and cross-loaded terrain near ridges where the wind has deposited firm snow. Watch for shooting cracks as a sign of soft slabs.
Solar aspects are going get hit hard by the sun today. Natural avalanches are expected, particularly on steep slopes and around exposed rocks. It will also make skier triggering of the storm slab more likely. They may step down to a crust below.
Last weeks snow has settled into a slab. The layers of concern below vary by aspect, but are most likely to be triggered on steep southerly aspects where buried crusts exist. The slab is stubborn to trigger but large avalanches are possible.
Storm snow is easily triggered by skiers. It is still a soft slab in most places, but has the potential to propagate widely on a touchy layer of surface hoar.&nbsp; Below treeline, open glades may be very reactive.
Storm snow is easily triggered by skiers. It is still a soft slab in most places, but has the potential to propagate widely on a touchy layer of surface hoar.  Below treeline, open glades may be very reactive.
New snow has created touchy conditions.  Skiers could trigger avalanches today.  Use caution in steep terrain.  Watch for slab formation where wind has deposited firmer snow.  Cracking around skis is a clue slabby conditions are present.
Instabilities in the upper 50cm from the recent storm snow.
Instabilities in the upper 50cm from the recent storm snow can step down to the Feb 12 surface hoar layer.
Instabilities in the upper 50cm from the recent storm snow can step down to the Feb 12 surface hoar layer.
Rapid loading by snow and wind is overloading the snowpack. Expect widespread natural avalanche activity, with large avalanches running into valley bottoms. Avalanches may step down to deeper persistent weak layers.
60cm of heavy storm snow is settling with mild temps. Rapid loading yesterday triggered widespread large avalanches. The snowpack needs time to adjust to the new load and will still be touchy to human triggering.
60cm of heavy storm snow is settling into a cohesive slab. Loading by wind and snowfall continues to trigger large avalanches. The snowpack needs time to adjust to the new load and will still be touchy to human triggering.
Over 80cm of snow has fallen since Friday. Weak interfaces within the storm slab exist. The snowpack needs time to adjust to the new load. It will still be touchy to human triggering, and may step down to surface hoar below.
Over 80cm of snow has fallen since Friday. Weak interfaces within the storm slab exist. The snowpack needs time to adjust to the new load. It will still be touchy to human triggering, and may step down to surface hoar below.
The storm slab has settled considerably over the past 2 days, but remains a concern due to the potential for wide propagations and step-down to the Feb 12 PWL.  Solar aspects and lee pockets are of particular concern.
The storm slab has settled considerably over the past 2 days, but remains a concern due to the potential for wide propagations and step-down to the Feb 12 PWL. Solar aspects and lee pockets are of particular concern.
The storm slab has settled considerably over the past 4 days, but remains a concern due to the potential for wide propagations and step-down to the Feb 12 PWL. Solar aspects and lee pockets are of particular concern.
A storm overnight has brought 25-30 cm of new snow with strong winds and rising temperatures. This has formed avalanche conditions.
A storm that started on Wednesday has brought 30-45cm of high density new snow with strong winds and rising temperatures. This has formed avalanche conditions.
A storm that started on Wednesday has brought  40-60cm of high density new snow with strong winds and rising temperatures. This has formed avalanche conditions.
Last weeks warm and wet storm rapidly deposited 50-60cm of heavy, moist snow at treeline. This was deposited on low density snow sitting on a crust and or surface hoar and is bonding poorly. At lower elevations, rain saturated the upper snow.
Last weeks storm rapidly deposited 50-60cm of heavy, moist snow at treeline. This was deposited on low density snow sitting on a crust and/or surface hoar and is weakly bonded. At lower elevations, rain saturated snow will have refrozen.
A buried rain crust is providing an ideal bed surface for new snow avalanches below 2000m. There's around 30cm overtop and was really reactive yesterday to rider triggering with wide propagation, running far and fast.
Convective snow flurries with strong winds yesterday added load to the storm slab problem above treeline. Below 2000 meters, a buried rain crust is providing an ideal bed surface for new snow avalanches at lower elevations.
Another 8-10cm of snow overnight has added load to last weeks storm interface.  More snow, moderate winds and warm temps today will add to this problem, especially on solar aspects where buried suncrusts are providing good failure planes.
Multiple convective storms and frontal systems continue to add incremental load.  The reactivity of the storm slabs is variable.  We know that solar aspects are most reactive due to buried crusts, and north aspects received most load.
New snow is reactive to rider triggering.  Use caution in steep terrain and unsupported features.  Avalanches with large consequences may run on solar aspects. A sun crust is present down 30 cm.  Northerly aspects with wind loaded snow may be touchy.
Up to 15 cm of new snow at treeline and above could be rider triggered.&nbsp; Watch for this snow to have formed a slab of denser snow.&nbsp; Especially on leeward features in open terrain.
Up to 20 cm of new snow in the alpine  could be rider triggered.  Watch for this snow to have formed a slab of denser snow.  Use caution on lee features in open terrain.
40 cm of heavy moist storm snow overnight with steady south winds has created slabs at and above treeline.  This layer will be touchy today, especially as temperatures warm up.
New, storm snow can be skier triggered.  Up to 70 cm of storm snow has created a slab on top of a crust.  Below treeline this snow is moist.  Treeline and above, south winds have loaded lee features.
An additional 10cm of new snow on top of the previous 35cm. This 45cm storm slab sits on a thick crust that could provide a good bed surface for an avalanche where the slab has not yet had a chance to bond to it.
Another 10cm overnight at tree line and above with reverse wind loading patterns. Storm snow instabilities and wind slab will exist at higher elevations before things have a chance to settle out.
More snow is expected today increasing the avalanche hazard. A new surface hoar layer is down around 20cm under this new snow. It has widespread distribution and will be easily triggered by riders under this new load.
Winds are expected to increase today, expect soft slabs at higher elevations that will be easily triggered by riders as sits is over a surface hoar layer. Lower down sluffs can gain mass and have larger consequences than expected.
Our latest surface hoar/crust layer is down under 30 to 40cm of storm snow. Consequences of triggering will increase as the slab strengthens over time.
Slabs are forming in over 40cm of storm snow.  Use caution in terrain over 30 degrees. Rider triggering is possible.  Fast sluffing is likely and will pick up large amounts of snow.  Avoid exposure to terrain traps.
Soft slabs are forming in over 50 cm of storm snow.  Use caution in terrain over 30 degrees. Small avalanches could trigger deeper instabilities.  Fast sluffing is likely and will pick up large amounts of snow.  Avoid exposure to terrain traps.
Over 50cm of storm snow has created soft slabs.  Use caution in terrain over 30 degrees.  Small avalanches could trigger deeper instabilities.
As the storm continues to dump snow, with strong winds and warm temps, the storm slab is becoming deeper and more cohesive. There are reactive layers within and at the base of the slab that are likely to be triggered by skiers.
55-60cm of storm snow in the past week with mild temperatures have created ideal slab conditions.
This weeks storm deposited 80cm of snow under ideal slab forming conditions. This slab sits on a weaker surface that may be reactive to skiers and riders, and the slab is deep enough to produce large avalanches.
Snow load has been steadily increasing over the last few days. With rising temperatures, wind and more snow on the way, riders should expect to see snow slabbing up and becoming more reactive as the day progresses.
Storm snow amounts keep accumulating with another 12cm overnight. It will need some time for storm layers to bond.
40cm of recent storm snow is settling. Within this slab are layers of large, weak snowflakes that may be triggered by skiers/riders.
40cm of recent storm snow is settling. Within this slab are layers of large, weak snowflakes that may be triggered by skiers/riders or by rapid loading during the storm. If triggered, this slab may step down to deeper instabilities.
Alpine temps rose overnight to 0'C at 1900m, before dropping below freezing again. Recent storm snow will have become more cohesive. There are a few weak layers within this slab. Tests indicate that they may be triggered by light loads, like you.
60cm of storm snow is likely to be triggered by riders. Use caution in steep, unsupported terrain.
The recent storm snow has instabilities within it that will need a few days to heal.
Mild temperatures today will make slab formation more likely.
Another 25cm of new snow overnight. Snow loading has been steady for the past 5 days with instabilities in the upper snowpack.
Another 10cm in the last 24 hours continues to incrementally load the snowpack. Moderate winds have created soft slabs in exposed areas.
Storm slabs will become an issue at the peak of the incoming system. Strong winds and warm temp's accompanying the new snow will develop slabs quickly in exposed lee features at all elevations.
Storm slabs have formed at all elevations, likely up to a metre thick in alpine and tree-line lee areas. It will take a bit of time for these to settle into the snowpack.
40 to 60 cm of storm snow has formed slabs. These deposits will be deeper in areas with wind loading. Natural avalanches are still possible, assess terrain continually while you travel.
40 to 60 cm of storm snow has formed slabs. These deposits will be deeper in areas with wind loading. Natural avalanches are still possible, assess terrain continually while you travel.
Storm snow instabilities still exist in the recent storm snow. Although it appears to be bonding well, another day or two of settlement and observations is needed before it is no longer considered to be a problem.
Snowpack tests yesterday showed instabilities in the upper 60cm in the moderate range.
The 40-50cm of snow from last week's storm continues to settle. Resistant planar results were seen in snow tests yesterday on this layer.
The storm slab is bonding well, as indicated in snowpack tests throughout the park. Use caution when entering wind-affected areas in the alpine and at tree-line.
A new storm slab is developing. The new snow is still loose and unconsolidated, but with mild temps and continued loading by new snow it will become more of a concern. Heads up if the snow starts to feel slabby. Watch for sluffing on steep slopes. 
60 to 70cm of storm snow has fallen over the past 3 days with strong southerly winds. Heavy density snowfall is rapidly loading a previous layer of low density snow causing storm slab formation.
Over 75 cm of heavy storm snow has fallen with moderate/strong southerly winds. This new snow is causing natural avalanches and is very touchy to human-triggering.
New overnight snow is exceptionally heavy with the mild temperatures we have. This snow is sitting over much lighter snow from earlier this week and the result is ideal slab conditions and weak layers for it to slide on.
Yesterdays blizzard deposited 35cm of heavy snow that is sitting over snow that is much lighter, including a buried surface hoar layer. This combination makes it more reactive to rider triggering until it has a chance to settle out.
Over a meter of new snow, combined with high winds and rising temps, have created a storm slab. It is sitting over snow that is much lighter, including a buried surface hoar layer. This slab will need some time to settle and bond.
Over a meter of new snow is about to get hit by lots of solar and above freezing temps right up to mountain top. Natural avalanches are expected from steep, solar aspects. In addition, the storm slab will likely be more reactive on sun exposed slopes
Natural avalanches are expected from solar aspects if the high, thin cloud breaks up. Over a metre of new snow may have trouble adjusting to intense sunshine and high freezing levels over the next 48hrs.
35cm of new snow has fallen onto a surface that will not bond easily. Triggering avalanches will not be difficult due to the nature of the recently buried weak layers.
50-60cm of storm snow overlies an old surface that will not bond well. Temperatures have increased and winds have picked up, creating stiffer slabs that are ripe to fail.
The storm slab overlies a weak surface and is not bonding well. Many avalanches have already slid on this interface, but if a slope has not released, it should be considered a ticking time-bomb.
The storm slab is just getting thicker and heavier on the underlying weak interface. Any large, open slope that has not slid should be treated with caution, as it awaits just that extra amount of load from a person.
A 100 cm storm slab sits on a weak layer.&nbsp; Skiers and riders will likely trigger this layer in avalanche terrain.&nbsp; Remote triggering is a concern, watch out for adjacent slopes.
20cm of additional load overnight totalling 1.2m over a weak layer which has been very reactive this past week. Riders have reported cracking, whoomphing and avalanches on this layer. This is in addition to any shallower storm snow instabilities.
As the slab over the weak layers down 100-140cm becomes more cohesive, it changes in how it reacts to a riders weight. The highly reactive stage may have passed but it is at a depth where triggering will be less frequent but much more dangerous.
As the slab over the weak layers down 100-140cm becomes more cohesive, it changes in how it reacts to a riders weight. The highly reactive stage may have passed, but it is at a depth where triggering is less frequent but much more dangerous.
The storm slab, which is 100-140cm thick and overlies a weak interface, is becoming more cohesive. However, the bond to the underlying interface is not showing much improvement. Skier triggering of this layer will have high consequence.
Soft slabs can be expected at higher elevations which is sitting over a weak layers of sun crust and facets. As winds and snow amounts increase this slab will tighten up and become more reactive.
Soft slabs exist at higher elevations. They sit atop a variety of surfaces (suncrust, facets, wind slab), and have been touchy to human-triggering. As more snow falls and the temp's warm up, expect them to become cohesive and more reactive.
Field teams found touchy soft slabs in open alpine and tree-line lee features yesterday. These slabs appeared to be failing within the new snow, but some were popping very easily off the suncrust on solar aspects.
A touchy slab lurks on the slopes, and were easily triggered by field teams and artillery control at all elevations. As it becomes more cohesive from snow-load and warming temp's, we expect this slab to propagate easily.
Warming temps through the storm created a punchy storm slab that is sitting on a variety of weak surfaces. Avalanche control proved that this slab is reactive and produced large avalanches. The slab may be more reactive in wind-exposed terrain. 
60 to 80 cm of warm/moist snow has formed a rider triggerable slab. Natural avalanches are expected this afternoon with rising temperatures and more snow load. Remote triggering is also a concern, watch out for adjacent slopes.
80 to 100 cm of warm/moist snow has formed a rider triggerable slab. We are currently seeing natural avalanches in the storm snow, some running to end of runnouts. Minimize your exposure today by skiing in mature forest.
30cm of heavy snow with wind fell yesterday over much cooler and lighter snow. This combination is what caused a large avalanche cycle. Storm snow instabilities will still exist in the upper 1m and will need some time to bond to be trusted.
Storm snow instabilities are present from snowpack tests yesterday. There is wind affect above treeline and lingering windslabs may exist in exposed areas.
Lots of new snow, with wind, through the weekend will form a new storm slab. This slab will likely be most reactive where it overlies suncrust, but will also bury small surface hoar. If triggered, this slab may also step down deeper.
We've had a significant amount of snow overnight. Combined with the mild temperatures, the southerly winds which have started to pick up and the crust which it sits on, the new storm slab will be highly reactive to human triggering.
65cm has fallen over the last 4 days with strong winds yesterday. On solar aspects this has buried a thick sun crust. Venturing out into larger terrain is not a good idea at this point as this new load will need some stabilization time.
Lingering storm slabs instabilities may exist from the last storm two days ago and the associated wind. 2 crusts have been recently buried by this. Caution in more exposed areas where the wind had a chance to stiffen the snow.
The recent storm snow is settling into a cohesive slab, particulary in wind affected areas. Various weak layers within, and just below, the slab exist and may be triggered by skiers or snowboarders. It may become more reactive during sunny periods.
Snow amounts have slowly been accumulating over the last few days and storm snow instabilities may catch you by surprise. Caution on unsupported slopes or wind affected areas. This new snow is likely to produce some fast sluffing on steep slopes.
Trickling snow over the last 4 days amounted to 60cm at tree line. Instabilities in the upper snowpack from the recent snow load may exist particularly in exposed areas that saw some wind.
Storm slab instabilities may exist and may pop with human triggering, solar warming and newly formed soft slab in the lee of ridge crests.
Storm slab instabilities newly formed soft slab in the lee of ridge crests may exist and pop with human triggering.
New snow overnight will have formed soft slabs in alpine and tree-line lee features. In wind-sheltered areas, it will likely be good quality skiing.
Yesterdays new snow bonded poorly to the snow below and became very reactive as the temps warmed up. Loose, moist avalanches were easily triggered by skiers. These avalanches were at the smallest &quot;knee-twisters&quot; but some grew to size 2.5.
20cm of new snow from earlier this week has bonded poorly to the snow below. It is especially reactive on solar aspects, where it is rapidly destabilized by even a little bit of sun. On lee aspects, soft slabs may exist from windloading by SW winds.
The recent storm slabs have been slow to bond and remain in the skier triggerable range. Lee aspects in the alpine and treeline elevations are the more likely areas for a slide to propagate. Low elevations may have possible moist sluffs.
We`ve had some incremental loading, 30cm in 3 days. The sun is expected to poke through the clouds today so expect conditions to become more dangerous as the day progresses, specially on the solar aspects if that happens.
Soft slabs were observed in the Alpine by a field team yesterday in the Asulkan drainage, and rising winds this morning will likely create more. Avalanche activity this morning is attributed to this problem.
20cm of new snow with some added wind created some reactive conditions at the higher elevations these past two days. Watch for cracking and more 'slabby' feeling snow as you venture on the upper mountain specially in the lee of ridge features.
The snow load has steadily increased with winds up high. A surface hoar/crust layer is buried 30-40cm depending on aspect. As this snow becomes moist it will become more susceptible to human triggering.
We've had enough snow in the past few days to warrant some caution up high. Winds have been steady and combined with rising temperatures things will slab up a some more.
The recent storm snow has not fully bonded to the underlying crust and surface hoar layer. Combined with the warm temp's, it has become a touchy surface slab that is reacting in higher elevation lee areas.
High to extreme winds in the last 24 hours have formed wind slabs in exposed Alpine and Treeline areas where the snow was still soft and dry. Pockets of good dry snow may be found in protected North aspect areas above 2400m.
There may be lingering surface slabs at alpine and tree-line elevations, due to the strong winds accompanying the last snowfall.
The 10-15cm of snow from a few days ago was redistributed by strong winds, creating windslabs in exposed alpine and tree-line locations.
New snow in the past weak is possible to skier-trigger.  Watch for hard, wind-deposited snow on lee features in the alpine.  Storm slabs failing on crusts is possible at lower elevations.
Slopes that have been baking in the sun can fail as a slab on crusts and on higher alpine elevations on North lee aspects.
If the sun has been baking slopes, there is the possibility of a slab avalanche failing on buried crusts. In the alpine slab avalanches could be triggered on lee North apects.
Lingering shallower slabs at higher elevations may still be out there.
Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust. The winds picked up overnight so watch out for areas that may be wind loaded.
Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust.&nbsp; Watch for small pockets of slab reactive on steep solar aspects. Expect increasing hazard as the temperature rises.
Rapid warming with mixed rain and snow is leading to an increasing avalanche hazard.&nbsp; Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust.
A heavy storm slab is building rapidly with moderate precipitation, warm temps and strong winds. It will bond poorly to the snow below and natural avalanches are occurring. Storm slabs may step down deeper resulting in very large avalanches.
A heavy storm slab that formed over the past 2 days will bond poorly to the snow below. Large natural avalanches have been occurring, running into valley bottoms. Storm slabs may step down deeper resulting in very large avalanches.
A heavy storm slab that formed over the past 3 days will bond poorly to the snow below. Large natural avalanches have been occurring, running into valley bottoms. Storm slabs may step down to deeper instabilities.
Storm snow layers up in the alpine are still suspect. We had 25cm of heavy snow over Dec 5 weak layer with strong winds. Some sunshine and the weight of a rider could be enough to trigger an avalanche.
Storm snow layers in the alpine are still suspect. The last storm cycle deposited ~25cm of heavy snow on an existing week layer in the upper snowpack. Some sunshine and the weight of a rider could be enough to trigger an avalanche.
Moderate to hard sudden planar test results down 25cm and 50cm were observed yesterday from the field team on Bruins Ridge. Because of this we will keep this as a concern for a little longer.
This SH layer now sits below 20-30cm of new snow. A storm slab is developing at higher elevations and wind-exposed areas. These slabs will bond poorly to the SH interface. Avalanches on this layer may run farther than expected, easily entrain snow.
A storm slab is developing, 25 to 30cm thick, at higher elevations and wind-exposed areas. These slabs will bond poorly to the surface hoar layer which it sits on. Avalanches on this layer may run farther than expected and easily entrain snow.
A 50cm slab sits over a very obvious surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere and is a very real threat to riders.
A 50cm slab sits over a very obvious surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere and is a very real threat to riders.
A 50cm slab sits over the December 17th surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere.&nbsp; This layer is a real threat to riders.
A very touchy surface hoar layer is buried by a 50 to 70cm thick storm slab. This layer is widespread, and is likely to be triggered anywhere is has not yet failed. It is easily triggered by light loads (ie you), from distances of up to 100m away.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A widespread touchy surface hoar layer down 50 to 70cm is likely to be triggered anywhere it has not yet failed. As the slab overtop stiffens it becomes less likely to trigger but  propagation and consequences will increase. </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Moccasin%20Flats%202014-12-24.pdf" target="_blank"><span class="s_9255B882">click photo</span></a><span class="s_AA239
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A widespread touchy surface hoar layer down 50 to 80cm is likely to be triggered anywhere it has not yet failed. As the slab overtop stiffens it becomes less likely to trigger but propagation and consequences will increase.  </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Moccasin%20Flats%202014-12-24.pdf" target="_blank"><span class="s_9255B882">click photo</span></a><span class="s_AA239
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. 
10-15cm of new snow with moderate winds last night. This has likely formed a thin storm slab in exposed ares, concealing existing wind slabs.  Riders may be surprised by this layer, as these avalanches have the potential to trigger deeper layers.
Although powdery in most places, 20-25cm of new snow is gaining cohesion. This layer has concealed recently formed wind slabs in exposed ares. Riders may be surprised by this layer, as these avalanches have the potential to trigger deeper layers.
Although powdery in most places, 25-35cm of new snow is gaining cohesion. Pockets of soft slabs will form near ridge crest where sufficient wind has gotten to it.
50cm of recent storm snow with more in the forecast. Settlement and winds have formed soft slabs particularly at ridge crests. Winds are on the rise and expect conditions to become more sensitive as winds continue.
70cm of storm snow since the New Year, moderate south winds and warming temperatures all translates into a settling surface slab. This will be most likely in highly wind exposed areas such as ridgelines and crossloaded features.
The storm slab should be settling and stiffening with the warming temperatures.  The question is the bond to the old snow surface of colder recrystalized snow.  We currently think this interface is weak and ripe for triggering.
The bond of the recent storm snow continues to improve however given the right location could still be reactive to human triggering. Steeper windloaded features at and above treeline should be treated with respect.
This layer is still producing results in snow profile stability tests but sings show that it is continuing to bond with the old snow interface. Steeper windloaded features at treeline and above should be treated with respect.
This layer has settled into a 40-50cm slab. The bond to old snow continues to improve, but human triggering is still possible in the right location. Use caution on steeper wind loaded features at treeline and above. Note slab changes as you travel.
There's 20-30cm of new snow overtop our latest surface hoar layer. This layer was observed to be widespread. As winds pick up and and the temperatures rise expect soft slabs to form and to be reactive to rider triggering.
~50cm of new snow overtop the widespread Jan 15 surface hoar layer. This layer was very reactive to human triggering yesterday. Expect this sensitivity to continue with the storm slab that formed overnight with the sustained strong southerly winds.
45cm+ of storm snow sits on the weak reactive January 15 surface hoar layer. Numerous natural avalanches to size 3 and skier triggered slides to size 2 have occurred over the last couple days on this layer.
40cm of new snow and strong southerly winds in have created a reactive storm slab. Expect storm slabs to be significantly thicker on lee features where snow has been transported by wind. This layer is easily triggered and will need time to stabilize.
We have 40cm of recent storm snow with very mild temperatures. Winds are strong in the alpine and its raining below 2000m.
We have up to 15mm or rain and 40cm of recent storm snow with very mild temperatures at all elevations.
40cm of storm snow was followed by 15mm of rain.&nbsp; This moist slab is likely to be touchy until temperatures drop below freezing.
~20cm of recent snow over a firm surface may be reactive to riders where wind has firmed it up enough to create a soft slab. Areas to watch for this are near ridge crests or cross loaded terrain features.
Soft slabs will be more prevalent today due to steadier overnight winds.  ~35cm sits on a firm, smooth layer providing a good surface for avalanches to slide on. Exercise extra caution near ridge crests or cross loaded terrain features.
Storm snow will be redistributed by mod southerly winds on to alpine lee slopes and crossloaded features. This storm snow sits on a firm smooth surface especially below 2200m. Take time to assess the snowpack while approaching wind affected features.
At treeline and above a soft slab is forming which sits on a firm bed surface. This storm slab is triggerable, and may propagate widely. In areas sheltered from the wind the loose storm snow may sluff on steep slopes, gaining mass.
A soft slab is forming which sits on a firm bed surface. This storm slab is triggerable and may propagate widely due to buried surface hoar on a crust. Continued loading through the storm will increase reactivity and the size of resulting avalanches.&nbsp;
25-30cm of heavy snow over lighter snow will make conditions dangerous until the rain and snow stop and temperatures cool down.
100mm of precipitation that fell as rain and snow is now sitting over the January 30 weak layer. This will make conditions dangerous until the rain and snow stop and temperatures cool down.
There is now about 1m of heavy storm snow above 1900m where temps have stayed below freezing. This storm slab is the triggering layer for recently observed large avalanches with far-reaching moist deposits.
With around 1m of settled storm snow over the last week, much of that rain below 1600m, time will be needed for instabilities within it to heal.
A warm, wet and windy storm over the weekend created a storm slab that is up to 1m deep. On lee slopes, wind loading may have made this slab much deeper and more reactive. 
A warm, wet and windy storm over the weekend created a storm slab that is up to 1m deep. On lee slopes, wind loading may have made this slab much deeper and more reactive. Tests indicate that the slab is stabilizing, but triggering is still possible.
15cm of overnight snow with moderate southerly winds have likely formed some soft slabs on and near ridge crests in the alpine.
Recent storm snow has likely formed some soft slabs on and near ridge crests in the alpine.
~20cm of dense storm snow at tree line and above. The first significant snowfall in quite some time overlies a variety of surfaces from crust, to facets to wind slab.
~20cm of dense storm snow at tree line and above. The first significant snowfall in quite some time overlies a variety of surfaces from crust, to facets to wind slab.
New snow continues to load the storm layer which is up to 40cm deep.&nbsp; In exposed lee areas, buried wind slabs within the storm snow will be difficult to identify visually.&nbsp; New&nbsp; snow, wind and warm temperatures will increase the hazard.
New snow continues to load the storm layer which is 40-60cm deep. In exposed lee areas, buried wind slabs within the storm snow will be difficult to identify visually. New snow, wind and warm temperatures will increase the hazard.
40-50cm of heavy storm snow will need some time to settle out and to bond to the crusts over which it lies. The associated winds were steady yesterday through the overnight period, creating soft slabs in exposed areas.
40-55cm of heavy storm snow over three days will need some time to settle out and to bond to the crusts over which it lies. The associated winds with the storm were steady creating soft slabs in exposed areas.
40-55cm of recent storm snow is settling into a slab and is bonding poorly where it overlies a crust. The associated winds with the storm were steady creating soft slabs in exposed areas. If triggered, the storm slab may step down to deeper layers.
Recent storm snow is settling into a slab and is bonding poorly where it overlies a crust. SW winds are increasing and are creating pockets of windslab at ridgetop. As freezing levels rise the slab may become more reactive.
The building load of storm snow is settling into a surface slab and is bonding poorly where it overlies a crust.  S through SW winds are creating pockets of fresh windslab at ridge top. Rising temps will increase reactivity of the storm slab.
~30cm of recent snow in the Alpine over lying a number of crusts which were reactive to riders throughout the area. Tread cautiously in the upper elevations where recent precipitation fell as snow.
Up to 40cm of recent snow in the Alpine over lying a number of crusts and wet layers which were reactive to riders throughout the area. Tread cautiously in the upper elevations where recent precipitation fell as snow.
Storm slabs should be expected at tree line elevations and above in the immediate lee of ridge lines and crossloaded features. These slabs are lying over a number of crust and weak layer sandwiches that were previously reactive to skier triggering.
20cm of new snow has added to the growing storm slabs at higher elevations. Strong SW'ly winds have magnified loading creating deeper, and touchier, pockets in lee areas. The storm slabs may be more reactive where they bond poorly to crusts below.
Up to 60cm of new snow exists at higher elevations. This new storm snow will get it's first &quot;kiss from the sun&quot; today, which often triggers avalanches. The storm slabs may be more reactive where they bond poorly to crusts below.
Up to 60cm of new snow exists at higher elevations. Tests show poorly bonded storm snow where buried crusts are present. Hazard will increase when the new storm snow gets a rapid warm up this morning, especially if forecasted clouds don't arrive.
30-40cm of rapidly settling storm snow sits over a weak wet layer below 2300m. Stability tests indicate that this layer is triggerable by light loads. At higher elevations moderate winds have created pockets of wind slab and fragile cornices.
Snow accumulations varied greatly during the past two storms, more was received on the west end of the Park. Reactive slabs may linger in the alpine. Be aware as the snow transitions from crust to soft snow under your boards.
20cm of moist snow fell at treeline with consistent SW winds. The storm slab sits atop a crust on solar aspects and surface hoar on sheltered N aspects. Strong winds will continue to develop the slab properties of this layer and increase hazard.
40cm of recent storm snow sits over surface hoar on northerly aspects. Associated winds with the storms have been enough to create slabs in exposed areas. Its time to select more conservative terrain.
40cm of recent storm snow sits over surface hoar on northerly aspects. Associated winds with the storms have been enough to create slabs in exposed areas. Its time to select more conservative terrain.
40cm of recent storm snow sits over surface hoar on northerly aspects. Associated winds with the storms have been enough to create slabs in exposed areas. Its time to select more conservative terrain.
40cm of recent snow has settled into a slab sitting on surface hoar on N'ly aspects and a sun crust on S aspects. Strong winds at ridgetop have created deeper pockets and loaded lee slopes. Today's strong sun will likely make it more reactive.
If we get significant amounts of snow today, along with winds, the new slabs will be particularly touchy, given that they will be sitting on a house of cards (surface hoar and crusts).
25cm of heavy new storm snow has combined with strong SW winds to form a slab over a touchy, widespread surface hoar layer. This slab is easily triggered by riders and has the potential to propagate into larger than expected avalanches.
25cm of heavy new storm snow has combined with strong SW winds to form a slab over a touchy, widespread surface hoar layer. This slab is easily triggered by riders and has the potential to propagate into larger than expected avalanches.
35cm of storm snow in past 48hrs along with warm temps and strong SW winds have formed storm slabs over a widespread weak surface hoar &amp; facet layer. If triggered there is potential for large slab propagation.
The Dec 2nd surface hoar layer is reaching critical overloading by the storm slab. Expect the storm slab to be reactive to both human and natural triggering.
The Dec 2nd surface hoar layer has reached critical load. Expect the storm slab to be reactive to both human and natural triggering.
The Dec 2nd surface hoar / crust layer has reached critical load. Expect the storm slab to be reactive to both human and natural triggering.
A 50-100cm thick slab overlies touchy surface hoar below treeline, and sun crust in the alpine. The surface hoar layer become more reactive at lower elevations. Expect the storm slab to be easy to trigger and capable of resulting in large avalanches.
A 50-100cm thick slab overlies touchy surface hoar below treeline, and sun crust in the alpine. The surface hoar layer becomes more reactive at lower elevations, and where it exists the storm slab will be easy to trigger.
4-5 hours of low end of moderate southerly winds are expected to have formed soft slabs in the immediate lee of alpine and treeline ridges and cross winded features.
Periods of moderate winds from various directions have redistributed the snow around in the alpine producing surface roughness and soft slab
30cm of new snow may bond poorly to the old snow surface.&nbsp; Currently new snow is low density but with rising temps and forecasted wind gusts a slab could build.
25-35cm of new, low density snow is being moved around by the winds at ridge-top. This is forming a slab in lee features, which will likely have a poor bond to the underlying interface of surface hoar, sun crust, or facets.
Where wind-affected, touchy soft slabs are forming. At lower elevations, mild temp's are settling the new snow into soft slabs as well. At all elevations, these thin slabs may pick up speed quickly, pushing folks into terrain traps.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 40cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer is easily triggered where it sits on preserved surface hoar crystals.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 40cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer was easily triggered in stability tests below treeline on surface hoar.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 50cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer was easily triggered in stability tests below treeline on surface hoar.
Slabs continue to develop as warm temps, wind and settlement turn the upper 50cm into a cohesive layer. Below treeline the recent storm snow was easily triggered in stab tests on surface hoar.  Soft slabs are present in alpine areas exposed to wind.
7hrs of moderate S winds have created storm slabs on alpine and treeline lee features. 
The settling storm snow is still reactive to skier/riders weight below treeline. In the Alpine windslab has formed from moderate s'rly winds.  With sunny periods forecast today expect the new snow to be more reactive with the sudden solar warming.
A new storm slab is building. 30cm of snow over 48hrs at treeline, with another ~15cm forecast, is settling into a slab with mild temps. This slab may be triggered by light loads (like you) and avalanches on this layer may step down to deeper layers.
Up to 50cm fell in 48hrs and settled into a storm slab rapidly. SW winds will have loaded lee slopes, forming even deeper slabs. This slab may be triggered by light loads (like you) and avalanches on this layer may step down to deeper layers.
This layer is once again primed for triggering thanks to ongoing strong winds. In exposed areas, this layer is a cohesive slab up to 60cm thick. It may be triggered by light loads and avalanches on this layer may step down to deeper layers.
Expect the storm slab to be touchy after another night of moderate S-SW winds.  On lee features and exposed areas the cohesive slab could be upwards of 60cm thick.  If triggered slides may step down to deeper weak layers.
The recent storm slab is gaining strength. The exception is in Alpine or at treeline where mod S-SW winds may have created a soft windslab. On lee and exposed features the cohesive slab could be 60cm thick. Slides may step down to deeper weak layers.
Since last weeks storm ~40cm of snow is forming into a storm slab. With more snow expected over the next few days this slab is thick enough to be a concern. In many areas it is still loose however in some areas tests indicate this slab is triggerable
~40cm of light snow remains loose in many areas and sluffs easily. As the storm progresses, it is expected settle into a slab with added snow, mild temps and SW winds. Watch for signs like &quot;upside-down&quot; feeling snow or cracking that indicate a slab.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
50cm of storm snow is settling into a slab with mild temps, added precip and wind.  Field trip to Lookout notch yesterday confirmed this with upside down feeling snow along with cracking of the surface layer.
Upwards of 50cm of storm snow will be settling into a denser slab over low density snow that fell early last week.  The storm slab can be expected to shear in unsupported terrain.
recent storm snow and wind deposits settling over a layer of lower density decomposing precipitation particles
Recent storm snow and wind deposits are settling rapidly over a layer of lower density decomposing precipitation particles. With the forecasted warm temps today this slab could become more reactive.
Recent storm snow and wind deposits are settling rapidly over a layer of lower density decomposing precipitation particles. With alpine temps above zero overnight this slab could become more reactive.
50cm of storm snow sits on isolated pockets of surface hoar and a curst on solar aspects.  Warm temps at low elevations and strong southerly winds have encouraged slab development. Stability tests show that this layer susceptible to skier triggering.
With up to 70cm of new snow at treeline and strong gusty winds over the last few days, expect avalanche conditions to be widespread. Human triggering is likely.
Skiers/boarders were triggering the storm slab yesterday. With an additional 15cm overnight and strong winds, this slab now packs a little more punch.
The storm slab will be a little more touchy once temp's warm up later in the day. It isn't the time to charge into aggressive terrain.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The storm slab is settling, but a couple layers within the new snow show the </span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/942661439117179/?type=2&amp;theater" target="_blank"><span class="s_9255B882">potential for step-down</span></a><span class="s_AA239A9B"> to lower layers if a slab is triggered.
New, touchy storm slabs are forming with ongoing snowfall and wind-loading. On steep slopes, especially areas exposed to wind, expect slabs to be easily triggered. While they aren't very deep (yet) they move fast and can accumulate in terrain traps.
Touchy storm slabs have formed in some areas. On steep slopes, especially ridgecrests, roll-overs and areas exposed to wind, expect slabs to be easily triggered. These soft slabs move fast and can accumulate in terrain traps.
Sensitive storm slabs have recently formed in the forecast area. Ridge crests, convexities, steep features, wind and SOLAR exposed terrain are locations of particular concern. Expect these slabs to be easily triggered.
Storm slabs may be sensitive to human triggering given the right terrain feature.&nbsp; Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
Storm slabs may be sensitive to human triggering given the right terrain feature. Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
Storm slabs are generally gaining strength but may still be sensitive to human triggering given the right terrain feature. Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
A slab on a weak layer down 10cm will become reactive with additional snow load arriving today. Strong SW winds will encourage slab development on loaded lee features. The slab is poorly bonded to a crust on solar aspects and widespread surface hoar.
~50cm of snow is settling into a soft slab and sits on a crust on solar aspects and surface hoar. If triggered it will likely run far &amp; fast especially with the crust as a bed surface. Expect it to sluff easily in areas where it hasn't formed a slab.
A touchy storm slab sits on a crust in the lower alpine(below ~2500m) down to treeline. This slab is catching riders off guard and is easily triggered on convex rolls.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Convective flurries have created a 30cm storm slab. It is most reactive where it sits on a crust. This slab is catching riders off guard and is easily triggered on convex rolls. </span><span class="s_2823317B">When the sun comes out this afternoon this slab will be very reactive!</span><span class="s_AA239
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A 30-50cm deep storm slab has formed. It is expected to become increasingly reactive due to the strong solar. In addition, on solar aspects it overlies a sun crust which provides a sliding surface. On lee, N'ly slopes soft windslabs may exist. </span><span class="s_28233
A 30-50cm deep storm slab has formed. It is expected to become increasingly reactive due to the strong solar. In addition, on solar aspects it overlies a sun crust which provides a sliding surface. On lee features, watch for touchy wind slabs.
The overnight snow has formed a storm slab at ridge-top and cross-loaded lee features. These pockets will likely be easy to &quot;pop&quot; out by the weight of a person.
Daily doses of 10-15cm is building a deep storm slab. Combined with sustained SW winds, slabs will be deeper on lee and cross-loaded features. Yesterday storm slabs were easy to trigger on convexities and wind loaded features. Expect the same today.
A touchy storm slab exists, with 30-50cm over a crust. On lee and cross-loaded features it's up to 1m deep. Yesterday skiers easily to triggered several size 2's and one size 3. They occurred in predictable places; steep slopes with a convexity.
A touchy storm slab exists, with 30-50cm over a crust. On lee and cross-loaded features it's up to 1m deep. On Friday skiers easily triggered several size 2's and one size 3. They occurred in predictable places; steep slopes with a convexity.
A touchy storm slab exists, with 30-50cm over a crust. On lee and cross-loaded features it's up to 1m deep. On Friday skiers easily triggered several size 2's and one size 3. They occurred in predictable places; steep slopes with a convexity.
Storms slabs will have formed overnight with the new snow and winds. Given the warm temp's, they will be stubborn to trigger, but be looking for them as you head onto the lee side of ridges.
Strong southerly winds continue to redistribute the new snow into lee features, especially in the high alpine where temp's are a little cooler. At higher elevations, these slabs will be touchier than lower down.
A ~30cm deep storm slab has developed and sits on a crust. Sustained winds will have built deeper pockets on lee slopes and in cross-loaded areas. These are likely to exist in areas where skiers/boarders are searching for skiable snow.
A ~30cm deep storm slab has developed and sits on a crust. Sustained winds will have built deeper pockets on lee slopes and in cross-loaded areas. These are likely to exist in areas where skiers/boarders are searching for skiable snow.
Moderate winds and significant snowfall should be creating sensitive storm slabs in the alpine and open areas at treeline.
Newly formed storm slabs should be treated as susceptible to human triggering. Once triggered it may overload the Nov 13 crust layer resulting in large avalanches.
While natural avalanche activity is tapering off, human triggered avalanches are still likely. Our new storm slab sits on previous wind slabs, combined this avalanche problem has the potential to step down to the Nov 13 Crust. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Human triggered avalanches are likely in the new storm slab, which also sit on previous wind slabs. Combined, these two slabs could step down to the Nov 13 Crust, triggering a persistent slab.&nbsp; </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
30cm of storm snow is settling over a very weak old surface of facetted  snow. The surface slab will be sensitive to human and natural triggering especially in areas of wind effect as it overloads the weak layer.
50cm of storm snow with strong gusting winds is sitting over a very weak old surface of facetted snow. Cracking and whumphing was observed yesterday from groups out skiing. With additional snowload and settlement the surface slab will remain touchy
~80cm of storm snow is settling into a slab. It sits on a weak and reactive layer of facets and spotty surface hoar. Yesterday skiers accidentally triggered a storm slab avalanche, partially burying a member of the group. Human triggering is likely.
80cm of storm snow is settling into a slab. The storm snow is poorly bonded to a reactive layer of facets and spotty surface hoar.
Cold temperatures have kept recent storm snow light and powdery, but slab properties are beginning to form. The slab sits on the December 18 facet/ surface hoar down 50-60cm. Stability tests show that the storm slab is reactive to skier loads.
Recent storm snow has been slow to form a slab in part due to cold temps. Slab properties are starting to form.  The slab rests on the Dec 18 facet/surface hoar layer down 50-60cm.  Stability tests show that the storm slab is reactive to skier loads.
The recent storm snow has been slow to form a slab in part due to continued cool temperatures. Slab properties are starting to form and this is a concern given the Dec 18th facet/surface hoar weak layer down 50-60cm.
The recent storm snow has been slow to form a slab in part due to continued cool temperatures. Slab properties are starting to form and this is a concern given the Dec 18th facet/surface hoar weak layer down 50-60cm.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Up to 30cm of snow fell in the last 24hrs at treeline. Combined with SW winds, expect deep loaded pockets to exist on lee slopes. This new slab has buried a surface hoar layer that was spotty in its distribution and may catch people by surprise.
50cm storm snow in 48hrs with flurries expected today. The storm snow has buried a spotty surface hoar layer to dig and look for. The new load will take a few days to stabilize.
60+ cm of new snow in the last 72 hours at tree line has created storm slabs most reactive at tree line and in the Alpine. The storm slab also stepped down to the Dec 18th interface yesterday on steep shallow southerly aspects with artillery control.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Since Thursday we have received 60cm+ snow at 1900m elevation which is settling into a slab. Expect the forming slab to be most reactive at and above TL. The storm slab did step down to the Dec 18th interface with artillery and explosive control.
15 cm of new snow in the last 24 hrs falls with moderate S winds is building a new slab.  Steady snowfall over the next few days will add load to this developing slab which sits on a weak layer of facets and surface hoar. 
35cm of new snow was accompanied by moderate S winds. This has created a new storm slab that is poorly bonded to a weak layer of facets and surface hoar. This slab will be reactive at all elevation bands, especially with the warm temp's today.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and reactive.
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and may become more reactive in the sun.
40 to 60cm of storm snow last week with warm temperatures and strong winds created a storm slab. This layer will need time to heal and bond to older surfaces like near surface faceting and wind slabs. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Storm slabs are most volatile near ridge crest and terrain exposed to the wind and lee features. Evaluate each slope independently, avoid steep, shallow, unsupported terrain, cornices and terrain traps.
Storm slabs are forming over a weak old snow surface that developed during the recent cold clear weather. Freshly formed slabs will be more sensitive to human triggering in wind exposed terrain.
30cm of storm snow overlies a variety of surfaces to which it may bond poorly. Skiers have triggered small, unsupported slopes. As the snow settles and forms a slab expect it to become more reactive and capable of propagating into larger avalanches.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a variety of surfaces to which it may bond poorly (</span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Profiles/20170207%20Balu%20Pass.png" target="_blank"><span class="s_9255B882">check out this snow profile</span></a><span class="s_AA239A9B">). As the snow forms a slab, and with new load from the storm expect it to become more reactive and capable of propagating into larger avalanches
Heavy loading from recent storms has created widespread storm slabs. With more snow and wind for today, natural avalanches on this layer are likely. This is a problem to avoid today, staying clear of large open avalanche terrain above tree line.
Widespread reactive storm slabs have formed. If triggered they have potential to run full path. Natural avalanche activity will taper off leaving slabs primed for human triggering.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Natural avalanche activity will taper off leaving slabs primed for human triggering.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Reports came in of whumphing &amp; low elevation slabs releasing below treeline yesterday.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Reports came in of whumphing &amp; low elevation slabs releasing below treeline yesterday.
The storm slab may become more sensitive to human triggering with rising freezing level to 2400m.  The other item to contend with will be the sun's  input on steep solar aspects warming the surface slab.
New snow and continued wind-transport have created storm slabs. In isolate locations, the storm snow conceals existing wind slabs. Ongoing precipitation and wind activity could enable these slabs to step down and trigger deeper instabilities.
Over 40cm of new snow in the past 3 days has been combined with strong southerly winds to create widespread and touchy storm slabs.  Ongoing precipitation and wind activity could enable these slabs to step down and trigger deeper instabilities.
Over 65cm of new snow in the past 3 days has been combined with strong southerly winds to create widespread and touchy storm slabs. These slabs may step down and trigger deeper instabilities.
Widespread storm slabs were observed to fail at all elevations yesterday. Treat all slopes that have not failed as suspect. Keep your route to supported terrain with eyes open for natural or human-triggered avalanches.
Widespread storm slabs were observed to fail at all elevations yesterday. Treat all slopes that have not failed as suspect. Field teams yesterday noted low elevation slabs below treeline were still reactive aswell.
Widespread storm slabs were observed to fail at all elevations Sunday.  The storm slab needs time to bond to the old snow surface. Features that have not failed should be given a very cautious approach. 
Storm slab formation has been widespread and through all elevations. However its susceptibility to human triggering is highly variable. The bond to the old snow surface of crusts and facets is questionable.
Incremental loading this week + 15cm of new snow last night and warming temps today is producing a touchy storm. This storm slab can step down to deeper layers and run full path, which has already occurred this am in the HWY corridor!</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Steady snowfall this week (+15cm of new snow again last night) and warming temps today have produced a touchy storm. Yesterday this storm slab was able to step down to deeper layers and ran full path.
Steady snowfall this week (70cm in 3 days) and warming temps today have produced a touchy storm. Yesterday this storm slab was able to step down to deeper layers and ran full path.
Steady snowfall this week (70cm in 3 days) and warming temps today have produced a touchy storm. Yesterday this storm slab was very reactive and resulted in numerous full path avalanches.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> 80cm of recent snowfall and warming temps yesterday and today are forming a </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/20170313%20Mounds.JPG" target="_blank"><span class="s_9255B882">reactive storm slab</span></a><span class="s_AA239A9B">. Numerous full path avalanches have occurred in the last 48hrs.
The recent storm snow is rapidly settling into a touchy storm slab, sensitive to both natural and human triggering. The slabs may be more touchy on recently loaded lee features.
Substantial snow and rain fell over the last 6 days! Rain on new snow then more new snow is a perfect combination for avalanches! Once commenced these storm slabs can step down to deeper layers in the snow pack, resulting in full depth avalanches.
Heavy precipitation combined with wind and warm temperatures have formed reactive storm slabs at all elevations. Although natural avalanche activity has subsided, these slabs remain triggerable by human loads!
Heavy precipitation combined with wind and warm temperatures have formed reactive storm slabs at all elevations. Added snowfall from last night and today will see these slabs become more active once again.
Heavy snowfall and extreme SW winds formed reactive storm slabs at tree-line and alpine elevations. These overlie various weak interfaces in the upper snowpack and need time to readjust to the new load.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Heavy snowfall and extreme SW winds formed reactive storm slabs at tree-line and alpine elevations. These overlie various weak interfaces in the upper snowpack and need time to readjust to the new load. </span><span class="s_2823317B">Strong solar warming</span><span class="s_AA239A9B"> today will test this slab.
It will take time for the storm slabs to stabilize. Snowpack tests in the region yesterday show that it is still reactive, and N'ly winds overnight will have reverse loaded lee slopes potentially re-awakening slabs in those areas.
Lots of uncertainty in the alpine currently with limited field observations. We should apply a significant margin of safety when assessing terrain, giving convexities and tension areas of the snow pack a wide berth.
If triggered storm slabs have the potential to step down to deeper layers buried in March or February. Mild temperatures are helping to heal our storm slab problem, as this process occurs the slab properties also increase over any buried weak layer!
If triggered storm slabs have the potential to step down to deeper layers buried in March or February. The warmth from solar heating today will make this slab more reactive.
10 cm of heavy snow with winds gusting to 40 kph will bond poorly to the moist snow surface after yesterdays warm temps.&nbsp; If triggered storm slabs have the potential to step down to deeper layers buried in March or February.
20-30 cm of heavy snow with moderate winds have formed storm slabs that need time to bond to the underlying moist snow surface. If triggered, these storm slabs have the potential to step down to deeper layers buried in March or February.
20cm of moist snow overlies a crust everywhere other than high elevation N'ly aspects. Winds have been shifting directions and will have formed deeper pockets on lee slopes. Rising freezing levels and continued loading will make them more reactive.
30cm of moist snow overlies a crust everywhere other than high elevation N'ly aspects. Winds have been shifting directions and will have formed deeper pockets on lee slopes. Rising freezing levels and continued loading will make them more reactive.
30cm of moist snow overlies a crust everywhere other than high elevation N'ly aspects. Winds have been shifting directions and will have formed deeper pockets on lee slopes. These slabs are reactive to human triggering.
New storm snow needs time to bond to the underlying firm temp crusts. Where winds have redistributed it in lee features, expect the slabs to be reactive to light human loads, especially at ridge-top, over convexities, and large planar alpine slopes.
In most areas the storm slab overlies a crust, which provides a good sliding layer if the slab is triggered. On lee features that have been windloaded, deeper pockets may be more reactive to human triggering.
Storm slabs are most volatile where they overlie a crust on solar aspects. Recent wind loading has redistributed the storm snow, leaving behind isolated pockets of wind slabs. lower elev should have seen a crust recovery last night.
25cm of storm snow now covers the Nov 9 SH (reported up to 20mm at TL, but not found in recent snow profiles). Warming temps and increasing south winds will promote formation of a storm slab. Keep a keen eye out for changing conditions over the day.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
35cm of storm snow now covers the Nov 9 interface. Warming temps and increasing south winds will promote the formation of a storm slab. Keep a keen eye out for changing conditions over the day.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
35cm of storm snow now covers the Nov 9 interface, plus another 10cm falling today. Warming temps and increasing winds will promote slab formation. Keep a keen eye out for changing conditions over the day.
60cm of storm snow now covers the Nov 9 interface. The storm slab will need a couple of days to heal, as the upper snowpack bonds. The storm slab will be most problematic on exposed terrain features and unsupported convexities.
70cm+ covers the November 9th interface. The storm slab will need a few days to bond to old snow surfaces. The storm slab is going to be a problem to watch out for coming into this weekend.
Heavy snow loading and strong alpine winds have created a reactive storm slab in the alpine.&nbsp; This storm slab will need a few days to bond to old snow surfaces.&nbsp; This problem will persist through the weekend.
Heavy snow loading and strong alpine winds have created a reactive storm slab in the alpine. The storm slab will be more reactive in unsupported terrain and ridgetop terrain features exposed to wind loading.
Heavy snow loading and strong alpine winds have created a reactive storm slab.  Yesterday shooting cracks were observed in the alpine. The storm slab will be most reactive in unsupported terrain and features exposed to wind loading.
The weekend storm brought wind and snow in abundance forming a widespread storm slab.  Storm snow instabilities should slowly settle out but warming this afternoon may wake them again.
Last weekend's storm slab will be settling quickly. Weak layers down 40cm and 60cm and Nov 9th interface should awaken with rapid warming, increased precipitation and strong SW winds forecast today.
Intense loading of start zones combined with warm temperatures and significant rain or snow fall, has created touchy storm slabs.
Heavy snowfall with wind today will build a touchy storm slab. The Nov 23rd crust will be a good bed surface for avalanches to run on. Avalanches may run far on top of this layer.
New snow and winds have created a storm slab that sits atop a supportive crust down 30cm. This layer will become more reactive with ongoing loading from wind and snow. This is an evolving problem that requires careful evaluation and decision making.
20+ cm of new snow with moderate winds fell in the last 24 hours. Expect slab formation on exposed terrain features and unsupported convex rolls. The storm snow has buried old wind slabs, which could still be reactive on specific terrain features.
The storm slab continues to develop with ongoing snowfall. Deeper and more reactive pockets are expected in windloaded areas. The slab overlies a crust, and with limited observations it's hard to predict just how reactive it is.
The steady accumulation of new snow is settling into a reactive storm slab. It will be most reactive at ridgetop and in steep unsupported terrain. Expect avalanches to be run fast and to the bottom of run-outs. Be aware of overhead exposure!
Settling new snow and wind at ridgetop has created a reactive soft slab.&nbsp; Compression tests yesterday showed shears in the storm snow down 15 &amp; 30cm. In steep alpine terrain avalanches may run to the bottom of run-outs. Be aware of overhead exposure!
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">After a long dry spell, 15cm of new snow has fallen on </span><span class="s_2823317B">widespread surface hoar. </span><span class="s_AA239A9B">Another 25 is expected today! As this new snow settles into a cohesive slab, expect to see avalanche hazard spike! Also expect sluff to be heavy and fast!
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">After a long dry spell, 40cm of new snow has fallen on </span><span class="s_2823317B">widespread surface hoar.  </span><span class="s_AA239A9B">As this new snow settles into a cohesive slab, expect to see it become more reactive.  SW winds in the 30-45kph range have built windslab in the alpine.
Yesterday's storm snow is settling into a slab. It will be reactive in windy areas in the Alpine and exposed areas at Tree Line. Steep solar asp will be problematic, as there will be a crust under our slab and a Surface Hoar/Facet combo BTL.
Recent storm snow continues to settle into a slab.  Expect the slab to be increasingly sensitivity as you transition into wind effected terrain. Steeper solar slopes harbor a thin crust layer below the storm snow and a facet surface hoar combo BTL.
The 30cms of recent storm snow will remain touchy for loose avalanches in steep terrain. With all the available fetch, strong Northerly winds will have created soft slabs on lee slopes.&nbsp; Avalanches will have the potential to reach runouts today.
The 25cms of recent storm snow along with the available fetch and recent strong winds will have created pockets of slab on lee slopes. Based on observations yesterday, avalanches have the potential to reach out into runout zones.
The 25cms of recent storm snow along with the available fetch and recent strong winds will have created pockets of slab on lee slopes. Based on observations Dec 30, avalanches have the potential to reach out into runout zones.
30cm of snow over the past 48hrs is settling into a soft slab with warm winters temps (-1 to -5). The Jan 4 surface hoar is down ~35cm and found to be up to 15mm in size. If triggered, small avalanches could initiate deeper layers.
40+cm of storm snow over the past 48hrs is settling into a slab with warm temperatures (-1 to -5). The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, small avalanches could step down to the Dec 15th PWL!
45cm of recent storm snow is settling into a slab assisted by warm temperatures (-1 to -5). The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, small avalanches could step down to the Dec 15th PWL with big results.
45cm of recent storm snow has settled into a slab. The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, avalanches could step down to the Dec 15th PWL with potential for large avalanches.
A reactive storm slab sits atop the Jan 4 surface hoar interface. The slab is poorly bonded where the surface hoar is well preserved. If triggered, avalanches could step down to the Dec 15th persistent weak layer causing very large slides.
A reactive storm slab continues to build &amp; 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.
10cm of storm snow accompanied by mod-strong S'ly winds have formed fresh storm slab at and above treeline. These slabs reside on a variety of surfaces such as small surface hoar, temperature crust and sun crust.
Yesterday's field info found remote triggering the surface slab in some locations and no slab in others. Warming temps, more new snow and mod S-SW winds will increase the density  of the slab and sensitivity of the layer to human triggering.
The Jan 16 surface hoar is widespread and buried 30cm. Incremental loading combined with wind action has led to slab development over this weak interface. The January 4th surface hoar is down 60cm and could be triggered by a storm slab avalanche.
Previous strong Southerly winds combined with recent new snow has led to surface slab development. This buries the Jan 16 surface hoar layer which is widespread and found down 30cm. Slabs triggered over this weak layer could propagate far.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Previous strong south winds combined with recent new snow has built surface slab. This buries the Jan 16 surface hoar which is widespread and found down 40cm. Slabs triggered over this </span><a href="https://www.facebook.com/ParksMountainSafety/videos/1546933272023323/" target="_blank"><span class="s_9255B882">weak layer</span></a><span class="s_AA239A9B"> could propagate far and trigger deeper layers.
Strong south winds combined with recent new snow has formed pockets of wind slab. This buries the Jan 16 surface hoar which is widespread and found down ~50cm. Slabs triggered over this weak layer could propagate far and trigger deeper layers.
Storm slabs will be most prevalent in areas exposed to the wind and steep unsupported convexities, where there's tension on the snowpack. Storm slabs triggered could step down to deeper layers.
Storm slabs sit on a layer of surface hoar and/or a thin crust. They will be most sensitive in areas exposed to wind and unsupported convexities, where there's tension in the snowpack. Storm slabs triggered could step down to deeper weak layers.
Soft storm slabs sit on a layer of surface hoar and/or a thin crust. They will be most sensitive in areas exposed to wind and unsupported convexities, where there's tension in the snowpack. Storm slabs triggered could step down to deeper weak layers.
Heavy snowfall and warming temperatures will create a reactive storm slab. If triggered, the slab could step down to deeper weak layers. With steady snowfall accumulation in the last week expect to see avalanches gaining mass and running far.
Heavy snowfall created a reactive storm slab. Wind loading continues to overload this weakness. If triggered, the slab could step down to deeper weak layers. Avalanches are running full path.
Recent heavy snowfall has created a reactive storm slab. Wind transport has added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Recent heavy snowfall has created a storm slab in some locations. Wind transport added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Ongoing heavy snowfall has created a storm slab. Wind transport added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Ongoing heavy snowfall has created a storm slab. Strong to extreme South winds will have redistributed new snow into a touchy windslab in the Alpine &amp; at Treeline.&nbsp; If triggered, the slab could step down to deeper persistent weak layers.
Consistent snowfall has created a storm slab. Previous strong South winds have redistributed the new snow into a windslab in the Alpine and at Treeline. If triggered, the slab could step down to deeper persistent weak layers.
Consistent snowfall over the week has created a storm slab. Previous strong South winds have redistributed the new snow into a windslab in the Alpine. If triggered, the slab could step down to deeper persistent weak layers.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">With the extra 25cm of new snow and moderate winds, our storm slab is not getting the time it needs to heal. A layer of large stellars was found down 25cm yesterday, which could have been the culprit layer in regards to the </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://www.avalanche.ca/mountain-information-network/submissions/d6311b3e-980a-41a9-8008-eccec0377268" target="_blank"><span class="s_9255B882">skier accidental size 2!</span></a><span class="s_AA239
40cm new snow and mod winds, our storm slab is not getting time to heal. A layer of large stellars was found down 25cm Monday, which could have been the culprit layer in regards to the size 2 skier accidental slide reported Monday on McGill.
Another 40cm overnight adds to our storm slab which has reached its critical load. The storm slab will need some time to adjust, settle out and stabilize.
The last storm brought over 60cm of new snow in 48hrs. Storm slabs remain touchy and are still resulting in large natural avalanches, as recently as 0700 this morning. Expect the &quot;first kiss of the sun&quot; to trigger more storm slab avalanches.
The last storm brought over 60cm of snow in 48hrs. In the alpine, mod winds have built windslab. If triggered these slabs will propagate very wide. Cornices have also grown in size &amp; become more fragile in the last week, give them a wide berth!
The last storm brought 60cm+ of snow. In the alpine, strong winds have formed windslab. If triggered these slabs have potential to propagate. Cornices have grown in size &amp; become more fragile in the last week, avoid exposing yourself to this hazard.
30cm of storm snow has been fallen over night with moderate southwest winds building pockets of wind slab in the alpine and exposed treeline locations. The storm slab will be most reactive along ridge lines, convexities and steep unsupported terrain.
40cm in 48hrs, previous moderate winds have redistributed it into pockets of wind slab in the alpine and exposed treeline locations. Expect the storm slab to be most reactive along ridge lines, convexities and in steep unsupported terrain.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Natural and skier triggered avalanches are still resulting from this reactive storm slab problem.  Loading from moderate to strong southerly winds has increased the likelihood storm slabs being triggered and propagating, especially in exposed areas.
Natural and skier triggered avalanches are still resulting from this reactive storm slab problem. Loading from moderate to strong southerly winds has increased the likelihood storm slabs being triggered and propagating, especially in exposed areas.
Moderate S'ly winds and 20cm of storm snow all landing on a facetted old snow surface should make for reactive storm slab at and above treeline.  Lingering windslab is also a concern and will be hidden under the new snow.
Moderate S'ly winds and 25cm of storm snow all landing on a facetted old snow surface. Where wind touched watch for a reactive storm slab at and above treeline. Recently buried windslab is also a concern more so on steeper solar locations.
Storm slabs will be most prevalent in the Alpine and areas at treeline where exposed to the wind. Previous wind slabs are now buried and slowly starting to heal. Cornice failures have tapered off, but it's still recommended to give them a wide berth.
Around 10 cm of new snow fell overnight with another 5-10 possible today. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. This new slab buries an old windslab that was reactive on solar aspects.
Recent snowfall has created a touchy storm slab. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.
Storm snow has formed into a touchy storm slab. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.
Storm snow has formed a slab at ridgetop, wind exposed terrain or in steep unsupported rolls. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.
Isolated storm slabs could be found at ridgetop or features exposed to the wind. Solar radiation will trigger loose dry avalanches on steep sunny slopes and cliffs. These &quot;sluffs&quot; could trigger a soft slab or step down to a persistent weak layer.
Isolated storm slabs could be found at ridgetop or features exposed to the wind. Solar radiation will trigger loose dry avalanches on steep sunny slopes and cliffs. These &quot;sluffs&quot; could trigger a soft slab or step down to a persistent weak layer.
New snow and southerly winds have created reactive storm slabs. Slabs will be well-formed on lee features when wind has contributed to loading. These slabs are touchy and sensitive to human triggered loads as well as natural inputs like wind and sun.
Minuscule amounts of new snow fell with moderate winds overlying a solid snowpack. A storm slab may be most problematic where it's sitting on a crust and or on a surface hoar on a crust, where exposed to the wind.
15cm of recent snow and moderate winds have built a storm slab and may be most problematic where it's sitting on a crust, or on surface hoar over a crust where exposed to the wind.
Five cm of new snow fell overnight with Southerly winds gusting to 81 km/hr. Another 5cm is forecast today with sustained winds building windslab in lee features.  Pay close attention solar aspects where near surface crusts act as a good bed surface
20cm new snow with Southerly winds gusting to 80 km/hr has formed a storm slab. Another 10cm is forecast today with sustained winds building windslab in lee features. Pay attention on solar aspects where near surface crusts act as a good bed surface
60cm of storm snow buries a crust up to 2000m on all aspects and into the alpine on solar aspects. 30cm of new snow is settling quickly could be reactive to human presence. Moderate to strong winds have formed wind slabs on lee features.
60cm of storm snow buries a crust up to 2000m on all aspects and into the alpine on solar aspects. 30cm of new snow is settling quickly could be reactive to human presence. Moderate to strong winds have formed wind slabs on lee features.
With the help of strong south winds, the storm snow is forming into a cohesive slab. The slab sits on a variety of surfaces including a widespread crust below tree line, a crust on solar aspects, and isolated pockets of surface hoar on polar aspects.
With the help of strong south winds, the storm snow is forming into a cohesive slab. The slab sits on a variety of surfaces including a widespread crust below tree line, a crust on solar aspects, and isolated pockets of surface hoar on polar aspects.
Storm slabs may be susceptible to human triggering. Steep S aspects where the slab may sit on a sun crust and wind loaded features on N and E aspects are the main concern.
A layer of storm snow sits over windslab at and above treeline. Watch for wind loading in lee features. Expect these pockets around cornices, wind lips and roll overs. Solar input and a warming trend today may wake surface layers on S'ly aspects.
25cm of snow in the last 24hrs with strong to extreme winds has created widespread storm slabs on all aspects at Treeline and in the Alpine. Expect the strong winds to have scoured south aspects &amp; created firm windslabs on North facing slopes.
Over 30cm in last 48hrs initially accompanied by strong to extreme winds has created widespread storm slabs on all aspects at Treeline and in the Alpine. Expect the strong winds to have scoured S aspects &amp; created firm windslabs on N facing terrain.
Over 30cm in last 72hrs initially accompanied by strong to extreme S'ly winds has created storm slabs on all aspects at and above Treeline . Wind effect may have hardened the slab on alpine lee slopes. Today's snow may mask this problem.
Over 40cm in last 72hrs accompanied by mod to strong winds has created storm slabs on all aspects at and above treeline . Wind effect may have hardened the slab on alpine lee slopes. Today's snow may mask this problem.
20 cm of  heavy storm snow has buried a layer of surface hoar, and on southerly aspects a sun crust. With forecast snow and wind over the weekend, this layer will become a concern. It will be easy to trigger and as the slab develops it may propagate.
We've received 40cm of snow in the past 3 days. This soft slab will be most reactive where it buried surface hoar or sun-crust.  We expect more snow and strong winds today, which may overload these layers resulting in natural avalanches.
We've received 60cm of snow in the past 4 days. This soft slab will be most reactive where it buried surface hoar or sun-crust. We expect more snow and strong winds today, which may overload these layers resulting in natural avalanches.
We've received 70cm of snow in the past 4 days. This soft slab will be most reactive where it buried surface hoar or sun-crust. We expect more snow and strong winds today, which may overload these layers resulting in natural avalanches.
We've received 90cm of snow on top of this layer at treeline which has settled into about 65cm of storm slab which will be most reactive where it buried surface hoar or sun-crust.
We've received 100cm of snow on top of this layer at treeline which has settled into about 65cm of storm slab which will be most reactive where it buried surface hoar or sun-crust.
A weak layer down around 65 cm is starting to react less in stability tests. Rider-triggering is still possible.  Use caution on steep slopes facing SW-W in the alpine where a buried thin sun crust identifies the weak layer.
A weak layer down around 65 cm is starting to react less in stability tests.  Rider-triggering is still possible.  Use caution on steep slopes facing SW-W in the alpine where a buried thin sun crust identifies the weak layer.
There has been 72cm of new snow over the last 5 days at treeline. Last nights storm sits over 30 cm very light snow. Conditions are likely to be &quot;heavy over light&quot; increasing the likelihood of skier triggering.
There has been 75cm of new snow over the last 6 days at treeline.  Conditions are likely to be &quot;heavy over light&quot; increasing the likelihood of skier triggering.
23cm of new snow sits over an old snow interface that is not likely to bond quickly. This new snow will add to the sluffing that has been observed over the past week when triggered.
33 cm of new snow sits over variable weak layers such as surface hoar, sun crust or facets, depending on your aspect and elevation. These are ideal  layers for an avalanche to release on.
  Weak layers such as surface hoar, sun crust or facets, depending on your aspect and elevation, are now buried 40 to 60cm deep. These are in the range of skier triggering and wider propagation as the slab settles.
Up to 65cm of storm snow lies on a weak interface of surface hoar and sun crust.  These layers are very reactive to skier triggering.  A widespread avalanche cycle occurred overnight, and avalanche control is planned for today.
Up to 70 cm of storm snow lies on a weak interface of surface hoar and sun crust, burried on January 4.  Avalanche control yesterday produced many avalanches on this layer.  Storm snow will continue to be reactive to skier triggering
30cm of new snow has created storm slabs. These can be triggered by riders especially in steep terrain. Watch for wind effected snow on north/northeast slopes in open areas at treeline and in the alpine. Snow will be sluffing in steep treed terrain.
45cm of new snow has created storm slabs. These can be triggered by riders especially in steep terrain. Watch for wind effected snow on north/northeast slopes in open areas at treeline and in the alpine. Snow will be sluffing in steep treed terrain.
45cm of new snow has created storm slabs. These can be triggered by riders especially in steep, unsupported terrain. Watch for wind effected snow on north/northeast aspects at treeline and in the alpine. Be cautious of sluffing in steep terrain.
Recent storm snow is settling into a more cohesive slab. Watch for wind effect on north/northeast aspects. Surface hoar below 1800m was observed in some drainages now buried down 40cm, this may become more reactive with settlement.
Storm snow continues to settle into a more cohesive slab. 50cm sits on a sun crust on steep south and west aspects and over surface hoar below 1800m. Wind effect on north and east aspects may exist.
Storm snow continues to settle into a more cohesive slab. 50cm sits on a sun crust on steep south and west aspects and over surface hoar below 1800m. Wind effect may exist near ridge tops.
Rising winds overnight and lots of deep soft snow available for wind transport will create storm/wind slabs at treeline and in the alpine. Be aware of soft slab formation in the lee of features at ridgelines. These soft slabs are running end fan. 
Strong winds in the last 24hrs and lots of deep soft snow available for wind transport have created storm/wind slabs at treeline and in the alpine. Be aware of soft slab formation in the lee of features at ridgelines.
Skier triggerable slabs exist throughout the park. Recent strong southerly winds have loaded northerly aspects. Avoid lee and cross-loaded terrain near ridges where the wind has deposited firm snow.  Watch for shooting cracks as a sign of soft slabs.
Skier triggerable slabs exist throughout the park. Recent strong southerly winds have loaded northerly aspects. Avoid lee and cross-loaded terrain near ridges where the wind has deposited firm snow. Watch for shooting cracks as a sign of soft slabs.
Solar aspects are going get hit hard by the sun today. Natural avalanches are expected, particularly on steep slopes and around exposed rocks. It will also make skier triggering of the storm slab more likely. They may step down to a crust below.
Last weeks snow has settled into a slab. The layers of concern below vary by aspect, but are most likely to be triggered on steep southerly aspects where buried crusts exist. The slab is stubborn to trigger but large avalanches are possible.
Storm snow is easily triggered by skiers. It is still a soft slab in most places, but has the potential to propagate widely on a touchy layer of surface hoar.&nbsp; Below treeline, open glades may be very reactive.
Storm snow is easily triggered by skiers. It is still a soft slab in most places, but has the potential to propagate widely on a touchy layer of surface hoar.  Below treeline, open glades may be very reactive.
New snow has created touchy conditions.  Skiers could trigger avalanches today.  Use caution in steep terrain.  Watch for slab formation where wind has deposited firmer snow.  Cracking around skis is a clue slabby conditions are present.
Instabilities in the upper 50cm from the recent storm snow.
Instabilities in the upper 50cm from the recent storm snow can step down to the Feb 12 surface hoar layer.
Instabilities in the upper 50cm from the recent storm snow can step down to the Feb 12 surface hoar layer.
Rapid loading by snow and wind is overloading the snowpack. Expect widespread natural avalanche activity, with large avalanches running into valley bottoms. Avalanches may step down to deeper persistent weak layers.
60cm of heavy storm snow is settling with mild temps. Rapid loading yesterday triggered widespread large avalanches. The snowpack needs time to adjust to the new load and will still be touchy to human triggering.
60cm of heavy storm snow is settling into a cohesive slab. Loading by wind and snowfall continues to trigger large avalanches. The snowpack needs time to adjust to the new load and will still be touchy to human triggering.
Over 80cm of snow has fallen since Friday. Weak interfaces within the storm slab exist. The snowpack needs time to adjust to the new load. It will still be touchy to human triggering, and may step down to surface hoar below.
Over 80cm of snow has fallen since Friday. Weak interfaces within the storm slab exist. The snowpack needs time to adjust to the new load. It will still be touchy to human triggering, and may step down to surface hoar below.
The storm slab has settled considerably over the past 2 days, but remains a concern due to the potential for wide propagations and step-down to the Feb 12 PWL.  Solar aspects and lee pockets are of particular concern.
The storm slab has settled considerably over the past 2 days, but remains a concern due to the potential for wide propagations and step-down to the Feb 12 PWL. Solar aspects and lee pockets are of particular concern.
The storm slab has settled considerably over the past 4 days, but remains a concern due to the potential for wide propagations and step-down to the Feb 12 PWL. Solar aspects and lee pockets are of particular concern.
A storm overnight has brought 25-30 cm of new snow with strong winds and rising temperatures. This has formed avalanche conditions.
A storm that started on Wednesday has brought 30-45cm of high density new snow with strong winds and rising temperatures. This has formed avalanche conditions.
A storm that started on Wednesday has brought  40-60cm of high density new snow with strong winds and rising temperatures. This has formed avalanche conditions.
Last weeks warm and wet storm rapidly deposited 50-60cm of heavy, moist snow at treeline. This was deposited on low density snow sitting on a crust and or surface hoar and is bonding poorly. At lower elevations, rain saturated the upper snow.
Last weeks storm rapidly deposited 50-60cm of heavy, moist snow at treeline. This was deposited on low density snow sitting on a crust and/or surface hoar and is weakly bonded. At lower elevations, rain saturated snow will have refrozen.
A buried rain crust is providing an ideal bed surface for new snow avalanches below 2000m. There's around 30cm overtop and was really reactive yesterday to rider triggering with wide propagation, running far and fast.
Convective snow flurries with strong winds yesterday added load to the storm slab problem above treeline. Below 2000 meters, a buried rain crust is providing an ideal bed surface for new snow avalanches at lower elevations.
Another 8-10cm of snow overnight has added load to last weeks storm interface.  More snow, moderate winds and warm temps today will add to this problem, especially on solar aspects where buried suncrusts are providing good failure planes.
Multiple convective storms and frontal systems continue to add incremental load.  The reactivity of the storm slabs is variable.  We know that solar aspects are most reactive due to buried crusts, and north aspects received most load.
New snow is reactive to rider triggering.  Use caution in steep terrain and unsupported features.  Avalanches with large consequences may run on solar aspects. A sun crust is present down 30 cm.  Northerly aspects with wind loaded snow may be touchy.
Up to 15 cm of new snow at treeline and above could be rider triggered.&nbsp; Watch for this snow to have formed a slab of denser snow.&nbsp; Especially on leeward features in open terrain.
40 cm of heavy moist storm snow overnight with steady south winds has created slabs at and above treeline.  This layer will be touchy today, especially as temperatures warm up.
New, storm snow can be skier triggered.  Up to 70 cm of storm snow has created a slab on top of a crust.  Below treeline this snow is moist.  Treeline and above, south winds have loaded lee features.
An additional 10cm of new snow on top of the previous 35cm. This 45cm storm slab sits on a thick crust that could provide a good bed surface for an avalanche where the slab has not yet had a chance to bond to it.
Another 10cm overnight at tree line and above with reverse wind loading patterns. Storm snow instabilities and wind slab will exist at higher elevations before things have a chance to settle out.
More snow is expected today increasing the avalanche hazard. A new surface hoar layer is down around 20cm under this new snow. It has widespread distribution and will be easily triggered by riders under this new load.
Winds are expected to increase today, expect soft slabs at higher elevations that will be easily triggered by riders as sits is over a surface hoar layer. Lower down sluffs can gain mass and have larger consequences than expected.
Our latest surface hoar/crust layer is down under 30 to 40cm of storm snow. Consequences of triggering will increase as the slab strengthens over time.
Slabs are forming in over 40cm of storm snow.  Use caution in terrain over 30 degrees. Rider triggering is possible.  Fast sluffing is likely and will pick up large amounts of snow.  Avoid exposure to terrain traps.
Soft slabs are forming in over 50 cm of storm snow.  Use caution in terrain over 30 degrees. Small avalanches could trigger deeper instabilities.  Fast sluffing is likely and will pick up large amounts of snow.  Avoid exposure to terrain traps.
Over 50cm of storm snow has created soft slabs.  Use caution in terrain over 30 degrees.  Small avalanches could trigger deeper instabilities.
As the storm continues to dump snow, with strong winds and warm temps, the storm slab is becoming deeper and more cohesive. There are reactive layers within and at the base of the slab that are likely to be triggered by skiers.
55-60cm of storm snow in the past week with mild temperatures have created ideal slab conditions.
This weeks storm deposited 80cm of snow under ideal slab forming conditions. This slab sits on a weaker surface that may be reactive to skiers and riders, and the slab is deep enough to produce large avalanches.
Snow load has been steadily increasing over the last few days. With rising temperatures, wind and more snow on the way, riders should expect to see snow slabbing up and becoming more reactive as the day progresses.
Storm snow amounts keep accumulating with another 12cm overnight. It will need some time for storm layers to bond.
40cm of recent storm snow is settling. Within this slab are layers of large, weak snowflakes that may be triggered by skiers/riders.
40cm of recent storm snow is settling. Within this slab are layers of large, weak snowflakes that may be triggered by skiers/riders or by rapid loading during the storm. If triggered, this slab may step down to deeper instabilities.
Alpine temps rose overnight to 0'C at 1900m, before dropping below freezing again. Recent storm snow will have become more cohesive. There are a few weak layers within this slab. Tests indicate that they may be triggered by light loads, like you.
60cm of storm snow is likely to be triggered by riders. Use caution in steep, unsupported terrain.
The recent storm snow has instabilities within it that will need a few days to heal.
Mild temperatures today will make slab formation more likely.
Another 25cm of new snow overnight. Snow loading has been steady for the past 5 days with instabilities in the upper snowpack.
Another 10cm in the last 24 hours continues to incrementally load the snowpack. Moderate winds have created soft slabs in exposed areas.
Storm slabs will become an issue at the peak of the incoming system. Strong winds and warm temp's accompanying the new snow will develop slabs quickly in exposed lee features at all elevations.
Storm slabs have formed at all elevations, likely up to a metre thick in alpine and tree-line lee areas. It will take a bit of time for these to settle into the snowpack.
40 to 60 cm of storm snow has formed slabs. These deposits will be deeper in areas with wind loading. Natural avalanches are still possible, assess terrain continually while you travel.
40 to 60 cm of storm snow has formed slabs. These deposits will be deeper in areas with wind loading. Natural avalanches are still possible, assess terrain continually while you travel.
Storm snow instabilities still exist in the recent storm snow. Although it appears to be bonding well, another day or two of settlement and observations is needed before it is no longer considered to be a problem.
Snowpack tests yesterday showed instabilities in the upper 60cm in the moderate range.
The 40-50cm of snow from last week's storm continues to settle. Resistant planar results were seen in snow tests yesterday on this layer.
The storm slab is bonding well, as indicated in snowpack tests throughout the park. Use caution when entering wind-affected areas in the alpine and at tree-line.
A new storm slab is developing. The new snow is still loose and unconsolidated, but with mild temps and continued loading by new snow it will become more of a concern. Heads up if the snow starts to feel slabby. Watch for sluffing on steep slopes. 
60 to 70cm of storm snow has fallen over the past 3 days with strong southerly winds. Heavy density snowfall is rapidly loading a previous layer of low density snow causing storm slab formation.
Over 75 cm of heavy storm snow has fallen with moderate/strong southerly winds. This new snow is causing natural avalanches and is very touchy to human-triggering.
New overnight snow is exceptionally heavy with the mild temperatures we have. This snow is sitting over much lighter snow from earlier this week and the result is ideal slab conditions and weak layers for it to slide on.
Yesterdays blizzard deposited 35cm of heavy snow that is sitting over snow that is much lighter, including a buried surface hoar layer. This combination makes it more reactive to rider triggering until it has a chance to settle out.
Over a meter of new snow, combined with high winds and rising temps, have created a storm slab. It is sitting over snow that is much lighter, including a buried surface hoar layer. This slab will need some time to settle and bond.
Over a meter of new snow is about to get hit by lots of solar and above freezing temps right up to mountain top. Natural avalanches are expected from steep, solar aspects. In addition, the storm slab will likely be more reactive on sun exposed slopes
Natural avalanches are expected from solar aspects if the high, thin cloud breaks up. Over a metre of new snow may have trouble adjusting to intense sunshine and high freezing levels over the next 48hrs.
35cm of new snow has fallen onto a surface that will not bond easily. Triggering avalanches will not be difficult due to the nature of the recently buried weak layers.
50-60cm of storm snow overlies an old surface that will not bond well. Temperatures have increased and winds have picked up, creating stiffer slabs that are ripe to fail.
The storm slab overlies a weak surface and is not bonding well. Many avalanches have already slid on this interface, but if a slope has not released, it should be considered a ticking time-bomb.
The storm slab is just getting thicker and heavier on the underlying weak interface. Any large, open slope that has not slid should be treated with caution, as it awaits just that extra amount of load from a person.
A 100 cm storm slab sits on a weak layer.&nbsp; Skiers and riders will likely trigger this layer in avalanche terrain.&nbsp; Remote triggering is a concern, watch out for adjacent slopes.
20cm of additional load overnight totalling 1.2m over a weak layer which has been very reactive this past week. Riders have reported cracking, whoomphing and avalanches on this layer. This is in addition to any shallower storm snow instabilities.
As the slab over the weak layers down 100-140cm becomes more cohesive, it changes in how it reacts to a riders weight. The highly reactive stage may have passed but it is at a depth where triggering will be less frequent but much more dangerous.
As the slab over the weak layers down 100-140cm becomes more cohesive, it changes in how it reacts to a riders weight. The highly reactive stage may have passed, but it is at a depth where triggering is less frequent but much more dangerous.
The storm slab, which is 100-140cm thick and overlies a weak interface, is becoming more cohesive. However, the bond to the underlying interface is not showing much improvement. Skier triggering of this layer will have high consequence.
Soft slabs can be expected at higher elevations which is sitting over a weak layers of sun crust and facets. As winds and snow amounts increase this slab will tighten up and become more reactive.
Soft slabs exist at higher elevations. They sit atop a variety of surfaces (suncrust, facets, wind slab), and have been touchy to human-triggering. As more snow falls and the temp's warm up, expect them to become cohesive and more reactive.
Field teams found touchy soft slabs in open alpine and tree-line lee features yesterday. These slabs appeared to be failing within the new snow, but some were popping very easily off the suncrust on solar aspects.
A touchy slab lurks on the slopes, and were easily triggered by field teams and artillery control at all elevations. As it becomes more cohesive from snow-load and warming temp's, we expect this slab to propagate easily.
Warming temps through the storm created a punchy storm slab that is sitting on a variety of weak surfaces. Avalanche control proved that this slab is reactive and produced large avalanches. The slab may be more reactive in wind-exposed terrain. 
60 to 80 cm of warm/moist snow has formed a rider triggerable slab. Natural avalanches are expected this afternoon with rising temperatures and more snow load. Remote triggering is also a concern, watch out for adjacent slopes.
80 to 100 cm of warm/moist snow has formed a rider triggerable slab. We are currently seeing natural avalanches in the storm snow, some running to end of runnouts. Minimize your exposure today by skiing in mature forest.
30cm of heavy snow with wind fell yesterday over much cooler and lighter snow. This combination is what caused a large avalanche cycle. Storm snow instabilities will still exist in the upper 1m and will need some time to bond to be trusted.
Storm snow instabilities are present from snowpack tests yesterday. There is wind affect above treeline and lingering windslabs may exist in exposed areas.
Lots of new snow, with wind, through the weekend will form a new storm slab. This slab will likely be most reactive where it overlies suncrust, but will also bury small surface hoar. If triggered, this slab may also step down deeper.
We've had a significant amount of snow overnight. Combined with the mild temperatures, the southerly winds which have started to pick up and the crust which it sits on, the new storm slab will be highly reactive to human triggering.
65cm has fallen over the last 4 days with strong winds yesterday. On solar aspects this has buried a thick sun crust. Venturing out into larger terrain is not a good idea at this point as this new load will need some stabilization time.
Lingering storm slabs instabilities may exist from the last storm two days ago and the associated wind. 2 crusts have been recently buried by this. Caution in more exposed areas where the wind had a chance to stiffen the snow.
The recent storm snow is settling into a cohesive slab, particulary in wind affected areas. Various weak layers within, and just below, the slab exist and may be triggered by skiers or snowboarders. It may become more reactive during sunny periods.
Snow amounts have slowly been accumulating over the last few days and storm snow instabilities may catch you by surprise. Caution on unsupported slopes or wind affected areas. This new snow is likely to produce some fast sluffing on steep slopes.
Trickling snow over the last 4 days amounted to 60cm at tree line. Instabilities in the upper snowpack from the recent snow load may exist particularly in exposed areas that saw some wind.
Storm slab instabilities may exist and may pop with human triggering, solar warming and newly formed soft slab in the lee of ridge crests.
Storm slab instabilities newly formed soft slab in the lee of ridge crests may exist and pop with human triggering.
New snow overnight will have formed soft slabs in alpine and tree-line lee features. In wind-sheltered areas, it will likely be good quality skiing.
Yesterdays new snow bonded poorly to the snow below and became very reactive as the temps warmed up. Loose, moist avalanches were easily triggered by skiers. These avalanches were at the smallest &quot;knee-twisters&quot; but some grew to size 2.5.
20cm of new snow from earlier this week has bonded poorly to the snow below. It is especially reactive on solar aspects, where it is rapidly destabilized by even a little bit of sun. On lee aspects, soft slabs may exist from windloading by SW winds.
The recent storm slabs have been slow to bond and remain in the skier triggerable range. Lee aspects in the alpine and treeline elevations are the more likely areas for a slide to propagate. Low elevations may have possible moist sluffs.
We`ve had some incremental loading, 30cm in 3 days. The sun is expected to poke through the clouds today so expect conditions to become more dangerous as the day progresses, specially on the solar aspects if that happens.
Soft slabs were observed in the Alpine by a field team yesterday in the Asulkan drainage, and rising winds this morning will likely create more. Avalanche activity this morning is attributed to this problem.
20cm of new snow with some added wind created some reactive conditions at the higher elevations these past two days. Watch for cracking and more 'slabby' feeling snow as you venture on the upper mountain specially in the lee of ridge features.
The snow load has steadily increased with winds up high. A surface hoar/crust layer is buried 30-40cm depending on aspect. As this snow becomes moist it will become more susceptible to human triggering.
We've had enough snow in the past few days to warrant some caution up high. Winds have been steady and combined with rising temperatures things will slab up a some more.
The recent storm snow has not fully bonded to the underlying crust and surface hoar layer. Combined with the warm temp's, it has become a touchy surface slab that is reacting in higher elevation lee areas.
High to extreme winds in the last 24 hours have formed wind slabs in exposed Alpine and Treeline areas where the snow was still soft and dry. Pockets of good dry snow may be found in protected North aspect areas above 2400m.
There may be lingering surface slabs at alpine and tree-line elevations, due to the strong winds accompanying the last snowfall.
The 10-15cm of snow from a few days ago was redistributed by strong winds, creating windslabs in exposed alpine and tree-line locations.
New snow in the past weak is possible to skier-trigger.  Watch for hard, wind-deposited snow on lee features in the alpine.  Storm slabs failing on crusts is possible at lower elevations.
Slopes that have been baking in the sun can fail as a slab on crusts and on higher alpine elevations on North lee aspects.
If the sun has been baking slopes, there is the possibility of a slab avalanche failing on buried crusts. In the alpine slab avalanches could be triggered on lee North apects.
Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust. The winds picked up overnight so watch out for areas that may be wind loaded.
Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust.&nbsp; Watch for small pockets of slab reactive on steep solar aspects. Expect increasing hazard as the temperature rises.
Rapid warming with mixed rain and snow is leading to an increasing avalanche hazard.&nbsp; Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust.
A heavy storm slab is building rapidly with moderate precipitation, warm temps and strong winds. It will bond poorly to the snow below and natural avalanches are occurring. Storm slabs may step down deeper resulting in very large avalanches.
A heavy storm slab that formed over the past 2 days will bond poorly to the snow below. Large natural avalanches have been occurring, running into valley bottoms. Storm slabs may step down deeper resulting in very large avalanches.
A heavy storm slab that formed over the past 3 days will bond poorly to the snow below. Large natural avalanches have been occurring, running into valley bottoms. Storm slabs may step down to deeper instabilities.
This SH layer now sits below 20-30cm of new snow. A storm slab is developing at higher elevations and wind-exposed areas. These slabs will bond poorly to the SH interface. Avalanches on this layer may run farther than expected, easily entrain snow.
A storm slab is developing, 25 to 30cm thick, at higher elevations and wind-exposed areas. These slabs will bond poorly to the surface hoar layer which it sits on. Avalanches on this layer may run farther than expected and easily entrain snow.
A 50cm slab sits over a very obvious surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere and is a very real threat to riders.
A 50cm slab sits over a very obvious surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere and is a very real threat to riders.
A 50cm slab sits over the December 17th surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere.&nbsp; This layer is a real threat to riders.
A very touchy surface hoar layer is buried by a 50 to 70cm thick storm slab. This layer is widespread, and is likely to be triggered anywhere is has not yet failed. It is easily triggered by light loads (ie you), from distances of up to 100m away.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A widespread touchy surface hoar layer down 50 to 70cm is likely to be triggered anywhere it has not yet failed. As the slab overtop stiffens it becomes less likely to trigger but  propagation and consequences will increase. </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Moccasin%20Flats%202014-12-24.pdf" target="_blank"><span class="s_9255B882">click photo</span></a><span class="s_AA239
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A widespread touchy surface hoar layer down 50 to 80cm is likely to be triggered anywhere it has not yet failed. As the slab overtop stiffens it becomes less likely to trigger but propagation and consequences will increase.  </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Moccasin%20Flats%202014-12-24.pdf" target="_blank"><span class="s_9255B882">click photo</span></a><span class="s_AA239
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. 
10-15cm of new snow with moderate winds last night. This has likely formed a thin storm slab in exposed ares, concealing existing wind slabs.  Riders may be surprised by this layer, as these avalanches have the potential to trigger deeper layers.
Although powdery in most places, 20-25cm of new snow is gaining cohesion. This layer has concealed recently formed wind slabs in exposed ares. Riders may be surprised by this layer, as these avalanches have the potential to trigger deeper layers.
Although powdery in most places, 25-35cm of new snow is gaining cohesion. Pockets of soft slabs will form near ridge crest where sufficient wind has gotten to it.
50cm of recent storm snow with more in the forecast. Settlement and winds have formed soft slabs particularly at ridge crests. Winds are on the rise and expect conditions to become more sensitive as winds continue.
70cm of storm snow since the New Year, moderate south winds and warming temperatures all translates into a settling surface slab. This will be most likely in highly wind exposed areas such as ridgelines and crossloaded features.
The storm slab should be settling and stiffening with the warming temperatures.  The question is the bond to the old snow surface of colder recrystalized snow.  We currently think this interface is weak and ripe for triggering.
The bond of the recent storm snow continues to improve however given the right location could still be reactive to human triggering. Steeper windloaded features at and above treeline should be treated with respect.
This layer is still producing results in snow profile stability tests but sings show that it is continuing to bond with the old snow interface. Steeper windloaded features at treeline and above should be treated with respect.
This layer has settled into a 40-50cm slab. The bond to old snow continues to improve, but human triggering is still possible in the right location. Use caution on steeper wind loaded features at treeline and above. Note slab changes as you travel.
There's 20-30cm of new snow overtop our latest surface hoar layer. This layer was observed to be widespread. As winds pick up and and the temperatures rise expect soft slabs to form and to be reactive to rider triggering.
~50cm of new snow overtop the widespread Jan 15 surface hoar layer. This layer was very reactive to human triggering yesterday. Expect this sensitivity to continue with the storm slab that formed overnight with the sustained strong southerly winds.
45cm+ of storm snow sits on the weak reactive January 15 surface hoar layer. Numerous natural avalanches to size 3 and skier triggered slides to size 2 have occurred over the last couple days on this layer.
40cm of new snow and strong southerly winds in have created a reactive storm slab. Expect storm slabs to be significantly thicker on lee features where snow has been transported by wind. This layer is easily triggered and will need time to stabilize.
We have 40cm of recent storm snow with very mild temperatures. Winds are strong in the alpine and its raining below 2000m.
We have up to 15mm or rain and 40cm of recent storm snow with very mild temperatures at all elevations.
40cm of storm snow was followed by 15mm of rain.&nbsp; This moist slab is likely to be touchy until temperatures drop below freezing.
~20cm of recent snow over a firm surface may be reactive to riders where wind has firmed it up enough to create a soft slab. Areas to watch for this are near ridge crests or cross loaded terrain features.
Soft slabs will be more prevalent today due to steadier overnight winds.  ~35cm sits on a firm, smooth layer providing a good surface for avalanches to slide on. Exercise extra caution near ridge crests or cross loaded terrain features.
Storm snow will be redistributed by mod southerly winds on to alpine lee slopes and crossloaded features. This storm snow sits on a firm smooth surface especially below 2200m. Take time to assess the snowpack while approaching wind affected features.
At treeline and above a soft slab is forming which sits on a firm bed surface. This storm slab is triggerable, and may propagate widely. In areas sheltered from the wind the loose storm snow may sluff on steep slopes, gaining mass.
A soft slab is forming which sits on a firm bed surface. This storm slab is triggerable and may propagate widely due to buried surface hoar on a crust. Continued loading through the storm will increase reactivity and the size of resulting avalanches.&nbsp;
25-30cm of heavy snow over lighter snow will make conditions dangerous until the rain and snow stop and temperatures cool down.
100mm of precipitation that fell as rain and snow is now sitting over the January 30 weak layer. This will make conditions dangerous until the rain and snow stop and temperatures cool down.
There is now about 1m of heavy storm snow above 1900m where temps have stayed below freezing. This storm slab is the triggering layer for recently observed large avalanches with far-reaching moist deposits.
With around 1m of settled storm snow over the last week, much of that rain below 1600m, time will be needed for instabilities within it to heal.
A warm, wet and windy storm over the weekend created a storm slab that is up to 1m deep. On lee slopes, wind loading may have made this slab much deeper and more reactive. 
A warm, wet and windy storm over the weekend created a storm slab that is up to 1m deep. On lee slopes, wind loading may have made this slab much deeper and more reactive. Tests indicate that the slab is stabilizing, but triggering is still possible.
~20cm of dense storm snow at tree line and above. The first significant snowfall in quite some time overlies a variety of surfaces from crust, to facets to wind slab.
~20cm of dense storm snow at tree line and above. The first significant snowfall in quite some time overlies a variety of surfaces from crust, to facets to wind slab.
New snow continues to load the storm layer which is up to 40cm deep.&nbsp; In exposed lee areas, buried wind slabs within the storm snow will be difficult to identify visually.&nbsp; New&nbsp; snow, wind and warm temperatures will increase the hazard.
New snow continues to load the storm layer which is 40-60cm deep. In exposed lee areas, buried wind slabs within the storm snow will be difficult to identify visually. New snow, wind and warm temperatures will increase the hazard.
40-50cm of heavy storm snow will need some time to settle out and to bond to the crusts over which it lies. The associated winds were steady yesterday through the overnight period, creating soft slabs in exposed areas.
40-55cm of heavy storm snow over three days will need some time to settle out and to bond to the crusts over which it lies. The associated winds with the storm were steady creating soft slabs in exposed areas.
40-55cm of recent storm snow is settling into a slab and is bonding poorly where it overlies a crust. The associated winds with the storm were steady creating soft slabs in exposed areas. If triggered, the storm slab may step down to deeper layers.
Recent storm snow is settling into a slab and is bonding poorly where it overlies a crust. SW winds are increasing and are creating pockets of windslab at ridgetop. As freezing levels rise the slab may become more reactive.
The building load of storm snow is settling into a surface slab and is bonding poorly where it overlies a crust.  S through SW winds are creating pockets of fresh windslab at ridge top. Rising temps will increase reactivity of the storm slab.
Up to 40cm of recent snow in the Alpine over lying a number of crusts and wet layers which were reactive to riders throughout the area. Tread cautiously in the upper elevations where recent precipitation fell as snow.
Storm slabs should be expected at tree line elevations and above in the immediate lee of ridge lines and crossloaded features. These slabs are lying over a number of crust and weak layer sandwiches that were previously reactive to skier triggering.
20cm of new snow has added to the growing storm slabs at higher elevations. Strong SW'ly winds have magnified loading creating deeper, and touchier, pockets in lee areas. The storm slabs may be more reactive where they bond poorly to crusts below.
Up to 60cm of new snow exists at higher elevations. This new storm snow will get it's first &quot;kiss from the sun&quot; today, which often triggers avalanches. The storm slabs may be more reactive where they bond poorly to crusts below.
Up to 60cm of new snow exists at higher elevations. Tests show poorly bonded storm snow where buried crusts are present. Hazard will increase when the new storm snow gets a rapid warm up this morning, especially if forecasted clouds don't arrive.
30-40cm of rapidly settling storm snow sits over a weak wet layer below 2300m. Stability tests indicate that this layer is triggerable by light loads. At higher elevations moderate winds have created pockets of wind slab and fragile cornices.
20cm of moist snow fell at treeline with consistent SW winds. The storm slab sits atop a crust on solar aspects and surface hoar on sheltered N aspects. Strong winds will continue to develop the slab properties of this layer and increase hazard.
40cm of recent storm snow sits over surface hoar on northerly aspects. Associated winds with the storms have been enough to create slabs in exposed areas. Its time to select more conservative terrain.
40cm of recent storm snow sits over surface hoar on northerly aspects. Associated winds with the storms have been enough to create slabs in exposed areas. Its time to select more conservative terrain.
40cm of recent storm snow sits over surface hoar on northerly aspects. Associated winds with the storms have been enough to create slabs in exposed areas. Its time to select more conservative terrain.
40cm of recent snow has settled into a slab sitting on surface hoar on N'ly aspects and a sun crust on S aspects. Strong winds at ridgetop have created deeper pockets and loaded lee slopes. Today's strong sun will likely make it more reactive.
If we get significant amounts of snow today, along with winds, the new slabs will be particularly touchy, given that they will be sitting on a house of cards (surface hoar and crusts).
25cm of heavy new storm snow has combined with strong SW winds to form a slab over a touchy, widespread surface hoar layer. This slab is easily triggered by riders and has the potential to propagate into larger than expected avalanches.
25cm of heavy new storm snow has combined with strong SW winds to form a slab over a touchy, widespread surface hoar layer. This slab is easily triggered by riders and has the potential to propagate into larger than expected avalanches.
35cm of storm snow in past 48hrs along with warm temps and strong SW winds have formed storm slabs over a widespread weak surface hoar &amp; facet layer. If triggered there is potential for large slab propagation.
The Dec 2nd surface hoar layer is reaching critical overloading by the storm slab. Expect the storm slab to be reactive to both human and natural triggering.
The Dec 2nd surface hoar layer has reached critical load. Expect the storm slab to be reactive to both human and natural triggering.
The Dec 2nd surface hoar / crust layer has reached critical load. Expect the storm slab to be reactive to both human and natural triggering.
A 50-100cm thick slab overlies touchy surface hoar below treeline, and sun crust in the alpine. The surface hoar layer become more reactive at lower elevations. Expect the storm slab to be easy to trigger and capable of resulting in large avalanches.
A 50-100cm thick slab overlies touchy surface hoar below treeline, and sun crust in the alpine. The surface hoar layer becomes more reactive at lower elevations, and where it exists the storm slab will be easy to trigger.
4-5 hours of low end of moderate southerly winds are expected to have formed soft slabs in the immediate lee of alpine and treeline ridges and cross winded features.
Periods of moderate winds from various directions have redistributed the snow around in the alpine producing surface roughness and soft slab
30cm of new snow may bond poorly to the old snow surface.&nbsp; Currently new snow is low density but with rising temps and forecasted wind gusts a slab could build.
25-35cm of new, low density snow is being moved around by the winds at ridge-top. This is forming a slab in lee features, which will likely have a poor bond to the underlying interface of surface hoar, sun crust, or facets.
Where wind-affected, touchy soft slabs are forming. At lower elevations, mild temp's are settling the new snow into soft slabs as well. At all elevations, these thin slabs may pick up speed quickly, pushing folks into terrain traps.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 40cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer is easily triggered where it sits on preserved surface hoar crystals.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 40cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer was easily triggered in stability tests below treeline on surface hoar.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 50cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer was easily triggered in stability tests below treeline on surface hoar.
Slabs continue to develop as warm temps, wind and settlement turn the upper 50cm into a cohesive layer. Below treeline the recent storm snow was easily triggered in stab tests on surface hoar.  Soft slabs are present in alpine areas exposed to wind.
7hrs of moderate S winds have created storm slabs on alpine and treeline lee features. 
The settling storm snow is still reactive to skier/riders weight below treeline. In the Alpine windslab has formed from moderate s'rly winds.  With sunny periods forecast today expect the new snow to be more reactive with the sudden solar warming.
A new storm slab is building. 30cm of snow over 48hrs at treeline, with another ~15cm forecast, is settling into a slab with mild temps. This slab may be triggered by light loads (like you) and avalanches on this layer may step down to deeper layers.
Up to 50cm fell in 48hrs and settled into a storm slab rapidly. SW winds will have loaded lee slopes, forming even deeper slabs. This slab may be triggered by light loads (like you) and avalanches on this layer may step down to deeper layers.
This layer is once again primed for triggering thanks to ongoing strong winds. In exposed areas, this layer is a cohesive slab up to 60cm thick. It may be triggered by light loads and avalanches on this layer may step down to deeper layers.
Expect the storm slab to be touchy after another night of moderate S-SW winds.  On lee features and exposed areas the cohesive slab could be upwards of 60cm thick.  If triggered slides may step down to deeper weak layers.
The recent storm slab is gaining strength. The exception is in Alpine or at treeline where mod S-SW winds may have created a soft windslab. On lee and exposed features the cohesive slab could be 60cm thick. Slides may step down to deeper weak layers.
Since last weeks storm ~40cm of snow is forming into a storm slab. With more snow expected over the next few days this slab is thick enough to be a concern. In many areas it is still loose however in some areas tests indicate this slab is triggerable
~40cm of light snow remains loose in many areas and sluffs easily. As the storm progresses, it is expected settle into a slab with added snow, mild temps and SW winds. Watch for signs like &quot;upside-down&quot; feeling snow or cracking that indicate a slab.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
50cm of storm snow is settling into a slab with mild temps, added precip and wind.  Field trip to Lookout notch yesterday confirmed this with upside down feeling snow along with cracking of the surface layer.
Upwards of 50cm of storm snow will be settling into a denser slab over low density snow that fell early last week.  The storm slab can be expected to shear in unsupported terrain.
recent storm snow and wind deposits settling over a layer of lower density decomposing precipitation particles
Recent storm snow and wind deposits are settling rapidly over a layer of lower density decomposing precipitation particles. With the forecasted warm temps today this slab could become more reactive.
Recent storm snow and wind deposits are settling rapidly over a layer of lower density decomposing precipitation particles. With alpine temps above zero overnight this slab could become more reactive.
50cm of storm snow sits on isolated pockets of surface hoar and a curst on solar aspects.  Warm temps at low elevations and strong southerly winds have encouraged slab development. Stability tests show that this layer susceptible to skier triggering.
With up to 70cm of new snow at treeline and strong gusty winds over the last few days, expect avalanche conditions to be widespread. Human triggering is likely.
Skiers/boarders were triggering the storm slab yesterday. With an additional 15cm overnight and strong winds, this slab now packs a little more punch.
The storm slab will be a little more touchy once temp's warm up later in the day. It isn't the time to charge into aggressive terrain.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The storm slab is settling, but a couple layers within the new snow show the </span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/942661439117179/?type=2&amp;theater" target="_blank"><span class="s_9255B882">potential for step-down</span></a><span class="s_AA239A9B"> to lower layers if a slab is triggered.
New, touchy storm slabs are forming with ongoing snowfall and wind-loading. On steep slopes, especially areas exposed to wind, expect slabs to be easily triggered. While they aren't very deep (yet) they move fast and can accumulate in terrain traps.
Touchy storm slabs have formed in some areas. On steep slopes, especially ridgecrests, roll-overs and areas exposed to wind, expect slabs to be easily triggered. These soft slabs move fast and can accumulate in terrain traps.
Sensitive storm slabs have recently formed in the forecast area. Ridge crests, convexities, steep features, wind and SOLAR exposed terrain are locations of particular concern. Expect these slabs to be easily triggered.
Storm slabs may be sensitive to human triggering given the right terrain feature.&nbsp; Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
Storm slabs may be sensitive to human triggering given the right terrain feature. Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
Storm slabs are generally gaining strength but may still be sensitive to human triggering given the right terrain feature. Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
A slab on a weak layer down 10cm will become reactive with additional snow load arriving today. Strong SW winds will encourage slab development on loaded lee features. The slab is poorly bonded to a crust on solar aspects and widespread surface hoar.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a strong crust and surface hoar.  This low density slab has the potential to gain alot of mass with a widespread crust as the bed surface. </span><span class="s_2823317B">Afternoon sun will add to the likelihood of triggering
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a strong crust and surface hoar which is poorly bonded in some locations. Field teams experienced whumphing on this layer yesterday. This low density slab has potential to gain alot of mass with a crust as the bed surface</span><span class="s_28233
40cm of storm snow sits on a strong crust and surface hoar which is poorly bonded in some locations. Field teams experienced whumphing on this layer yesterday. This low density slab has potential to gain alot of mass with a crust as the bed surface
~50cm of snow is settling into a soft slab and sits on a crust on solar aspects and surface hoar. If triggered it will likely run far &amp; fast especially with the crust as a bed surface. Expect it to sluff easily in areas where it hasn't formed a slab.
A touchy storm slab sits on a crust in the lower alpine(below ~2500m) down to treeline. This slab is catching riders off guard and is easily triggered on convex rolls.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Convective flurries have created a 30cm storm slab. It is most reactive where it sits on a crust. This slab is catching riders off guard and is easily triggered on convex rolls. </span><span class="s_2823317B">When the sun comes out this afternoon this slab will be very reactive!</span><span class="s_AA239
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A 30-50cm deep storm slab has formed. It is expected to become increasingly reactive due to the strong solar. In addition, on solar aspects it overlies a sun crust which provides a sliding surface. On lee, N'ly slopes soft windslabs may exist. </span><span class="s_28233
A 30-50cm deep storm slab has formed. It is expected to become increasingly reactive due to the strong solar. In addition, on solar aspects it overlies a sun crust which provides a sliding surface. On lee features, watch for touchy wind slabs.
The overnight snow has formed a storm slab at ridge-top and cross-loaded lee features. These pockets will likely be easy to &quot;pop&quot; out by the weight of a person.
Daily doses of 10-15cm is building a deep storm slab. Combined with sustained SW winds, slabs will be deeper on lee and cross-loaded features. Yesterday storm slabs were easy to trigger on convexities and wind loaded features. Expect the same today.
A touchy storm slab exists, with 30-50cm over a crust. On lee and cross-loaded features it's up to 1m deep. Yesterday skiers easily to triggered several size 2's and one size 3. They occurred in predictable places; steep slopes with a convexity.
A touchy storm slab exists, with 30-50cm over a crust. On lee and cross-loaded features it's up to 1m deep. On Friday skiers easily triggered several size 2's and one size 3. They occurred in predictable places; steep slopes with a convexity.
A touchy storm slab exists, with 30-50cm over a crust. On lee and cross-loaded features it's up to 1m deep. On Friday skiers easily triggered several size 2's and one size 3. They occurred in predictable places; steep slopes with a convexity.
Storms slabs will have formed overnight with the new snow and winds. Given the warm temp's, they will be stubborn to trigger, but be looking for them as you head onto the lee side of ridges.
Strong southerly winds continue to redistribute the new snow into lee features, especially in the high alpine where temp's are a little cooler. At higher elevations, these slabs will be touchier than lower down.
A ~30cm deep storm slab has developed and sits on a crust. Sustained winds will have built deeper pockets on lee slopes and in cross-loaded areas. These are likely to exist in areas where skiers/boarders are searching for skiable snow.
A ~30cm deep storm slab has developed and sits on a crust. Sustained winds will have built deeper pockets on lee slopes and in cross-loaded areas. These are likely to exist in areas where skiers/boarders are searching for skiable snow.
Moderate winds and significant snowfall should be creating sensitive storm slabs in the alpine and open areas at treeline.
Newly formed storm slabs should be treated as susceptible to human triggering. Once triggered it may overload the Nov 13 crust layer resulting in large avalanches.
While natural avalanche activity is tapering off, human triggered avalanches are still likely. Our new storm slab sits on previous wind slabs, combined this avalanche problem has the potential to step down to the Nov 13 Crust. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Human triggered avalanches are likely in the new storm slab, which also sit on previous wind slabs. Combined, these two slabs could step down to the Nov 13 Crust, triggering a persistent slab.&nbsp; </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
30cm of storm snow is settling over a very weak old surface of facetted  snow. The surface slab will be sensitive to human and natural triggering especially in areas of wind effect as it overloads the weak layer.
50cm of storm snow with strong gusting winds is sitting over a very weak old surface of facetted snow. Cracking and whumphing was observed yesterday from groups out skiing. With additional snowload and settlement the surface slab will remain touchy
~80cm of storm snow is settling into a slab. It sits on a weak and reactive layer of facets and spotty surface hoar. Yesterday skiers accidentally triggered a storm slab avalanche, partially burying a member of the group. Human triggering is likely.
80cm of storm snow is settling into a slab. The storm snow is poorly bonded to a reactive layer of facets and spotty surface hoar.
Cold temperatures have kept recent storm snow light and powdery, but slab properties are beginning to form. The slab sits on the December 18 facet/ surface hoar down 50-60cm. Stability tests show that the storm slab is reactive to skier loads.
Recent storm snow has been slow to form a slab in part due to cold temps. Slab properties are starting to form.  The slab rests on the Dec 18 facet/surface hoar layer down 50-60cm.  Stability tests show that the storm slab is reactive to skier loads.
The recent storm snow has been slow to form a slab in part due to continued cool temperatures. Slab properties are starting to form and this is a concern given the Dec 18th facet/surface hoar weak layer down 50-60cm.
The recent storm snow has been slow to form a slab in part due to continued cool temperatures. Slab properties are starting to form and this is a concern given the Dec 18th facet/surface hoar weak layer down 50-60cm.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Up to 30cm of snow fell in the last 24hrs at treeline. Combined with SW winds, expect deep loaded pockets to exist on lee slopes. This new slab has buried a surface hoar layer that was spotty in its distribution and may catch people by surprise.
Up to 30cm of snow fell in the last 24hrs at treeline with another 15-25 expected today &amp; tonight. This new slab has buried a spotty surface hoar layer, that could be lurking. Expect this new load to take some time to stabilize.
50cm storm snow in 48hrs with flurries expected today. The storm snow has buried a spotty surface hoar layer to dig and look for. The new load will take a few days to stabilize.
60+ cm of new snow in the last 72 hours at tree line has created storm slabs most reactive at tree line and in the Alpine. The storm slab also stepped down to the Dec 18th interface yesterday on steep shallow southerly aspects with artillery control.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Since Thursday we have received 60cm+ snow at 1900m elevation which is settling into a slab. Expect the forming slab to be most reactive at and above TL. The storm slab did step down to the Dec 18th interface with artillery and explosive control.
15 cm of new snow in the last 24 hrs falls with moderate S winds is building a new slab.  Steady snowfall over the next few days will add load to this developing slab which sits on a weak layer of facets and surface hoar. 
35cm of new snow was accompanied by moderate S winds. This has created a new storm slab that is poorly bonded to a weak layer of facets and surface hoar. This slab will be reactive at all elevation bands, especially with the warm temp's today.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and reactive.
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and may become more reactive in the sun.
40 to 60cm of storm snow last week with warm temperatures and strong winds created a storm slab. This layer will need time to heal and bond to older surfaces like near surface faceting and wind slabs. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Storm slabs are most volatile near ridge crest and terrain exposed to the wind and lee features. Evaluate each slope independently, avoid steep, shallow, unsupported terrain, cornices and terrain traps.
Storm slabs are forming over a weak old snow surface that developed during the recent cold clear weather. Freshly formed slabs will be more sensitive to human triggering in wind exposed terrain.
30cm of storm snow overlies a variety of surfaces to which it may bond poorly. Skiers have triggered small, unsupported slopes. As the snow settles and forms a slab expect it to become more reactive and capable of propagating into larger avalanches.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a variety of surfaces to which it may bond poorly (</span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Profiles/20170207%20Balu%20Pass.png" target="_blank"><span class="s_9255B882">check out this snow profile</span></a><span class="s_AA239A9B">). As the snow forms a slab, and with new load from the storm expect it to become more reactive and capable of propagating into larger avalanches
Heavy loading from recent storms has created widespread storm slabs. With more snow and wind for today, natural avalanches on this layer are likely. This is a problem to avoid today, staying clear of large open avalanche terrain above tree line.
Widespread reactive storm slabs have formed. If triggered they have potential to run full path. Natural avalanche activity will taper off leaving slabs primed for human triggering.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Natural avalanche activity will taper off leaving slabs primed for human triggering.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Reports came in of whumphing &amp; low elevation slabs releasing below treeline yesterday.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Reports came in of whumphing &amp; low elevation slabs releasing below treeline yesterday.
The storm slab may become more sensitive to human triggering with rising freezing level to 2400m.  The other item to contend with will be the sun's  input on steep solar aspects warming the surface slab.
New snow and continued wind-transport have created storm slabs. In isolate locations, the storm snow conceals existing wind slabs. Ongoing precipitation and wind activity could enable these slabs to step down and trigger deeper instabilities.
Over 40cm of new snow in the past 3 days has been combined with strong southerly winds to create widespread and touchy storm slabs.  Ongoing precipitation and wind activity could enable these slabs to step down and trigger deeper instabilities.
Over 65cm of new snow in the past 3 days has been combined with strong southerly winds to create widespread and touchy storm slabs. These slabs may step down and trigger deeper instabilities.
Widespread storm slabs were observed to fail at all elevations yesterday. Treat all slopes that have not failed as suspect. Keep your route to supported terrain with eyes open for natural or human-triggered avalanches.
Widespread storm slabs were observed to fail at all elevations yesterday. Treat all slopes that have not failed as suspect. Field teams yesterday noted low elevation slabs below treeline were still reactive aswell.
Widespread storm slabs were observed to fail at all elevations Sunday.  The storm slab needs time to bond to the old snow surface. Features that have not failed should be given a very cautious approach. 
Storm slab formation has been widespread and through all elevations. However its susceptibility to human triggering is highly variable. The bond to the old snow surface of crusts and facets is questionable.
Incremental loading this week + 15cm of new snow last night and warming temps today is producing a touchy storm. This storm slab can step down to deeper layers and run full path, which has already occurred this am in the HWY corridor!</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Steady snowfall this week (+15cm of new snow again last night) and warming temps today have produced a touchy storm. Yesterday this storm slab was able to step down to deeper layers and ran full path.
Steady snowfall this week (70cm in 3 days) and warming temps today have produced a touchy storm. Yesterday this storm slab was able to step down to deeper layers and ran full path.
Steady snowfall this week (70cm in 3 days) and warming temps today have produced a touchy storm. Yesterday this storm slab was very reactive and resulted in numerous full path avalanches.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> 80cm of recent snowfall and warming temps yesterday and today are forming a </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/20170313%20Mounds.JPG" target="_blank"><span class="s_9255B882">reactive storm slab</span></a><span class="s_AA239A9B">. Numerous full path avalanches have occurred in the last 48hrs.
The recent storm snow is rapidly settling into a touchy storm slab, sensitive to both natural and human triggering. The slabs may be more touchy on recently loaded lee features.
Substantial snow and rain fell over the last 6 days! Rain on new snow then more new snow is a perfect combination for avalanches! Once commenced these storm slabs can step down to deeper layers in the snow pack, resulting in full depth avalanches.
Heavy precipitation combined with wind and warm temperatures have formed reactive storm slabs at all elevations. Although natural avalanche activity has subsided, these slabs remain triggerable by human loads!
Heavy precipitation combined with wind and warm temperatures have formed reactive storm slabs at all elevations. Added snowfall from last night and today will see these slabs become more active once again.
Heavy snowfall and extreme SW winds formed reactive storm slabs at tree-line and alpine elevations. These overlie various weak interfaces in the upper snowpack and need time to readjust to the new load.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Heavy snowfall and extreme SW winds formed reactive storm slabs at tree-line and alpine elevations. These overlie various weak interfaces in the upper snowpack and need time to readjust to the new load. </span><span class="s_2823317B">Strong solar warming</span><span class="s_AA239A9B"> today will test this slab.
It will take time for the storm slabs to stabilize. Snowpack tests in the region yesterday show that it is still reactive, and N'ly winds overnight will have reverse loaded lee slopes potentially re-awakening slabs in those areas.
Lots of uncertainty in the alpine currently with limited field observations. We should apply a significant margin of safety when assessing terrain, giving convexities and tension areas of the snow pack a wide berth.
If triggered storm slabs have the potential to step down to deeper layers buried in March or February. Mild temperatures are helping to heal our storm slab problem, as this process occurs the slab properties also increase over any buried weak layer!
10 cm of heavy snow with winds gusting to 40 kph will bond poorly to the moist snow surface after yesterdays warm temps.&nbsp; If triggered storm slabs have the potential to step down to deeper layers buried in March or February.
20-30 cm of heavy snow with moderate winds have formed storm slabs that need time to bond to the underlying moist snow surface. If triggered, these storm slabs have the potential to step down to deeper layers buried in March or February.
20cm of moist snow overlies a crust everywhere other than high elevation N'ly aspects. Winds have been shifting directions and will have formed deeper pockets on lee slopes. Rising freezing levels and continued loading will make them more reactive.
30cm of moist snow overlies a crust everywhere other than high elevation N'ly aspects. Winds have been shifting directions and will have formed deeper pockets on lee slopes. Rising freezing levels and continued loading will make them more reactive.
30cm of moist snow overlies a crust everywhere other than high elevation N'ly aspects. Winds have been shifting directions and will have formed deeper pockets on lee slopes. These slabs are reactive to human triggering.
New storm snow needs time to bond to the underlying firm temp crusts. Where winds have redistributed it in lee features, expect the slabs to be reactive to light human loads, especially at ridge-top, over convexities, and large planar alpine slopes.
In most areas the storm slab overlies a crust, which provides a good sliding layer if the slab is triggered. On lee features that have been windloaded, deeper pockets may be more reactive to human triggering.
Storm slabs are most volatile where they overlie a crust on solar aspects. Recent wind loading has redistributed the storm snow, leaving behind isolated pockets of wind slabs. lower elev should have seen a crust recovery last night.
25cm of storm snow now covers the Nov 9 SH (reported up to 20mm at TL, but not found in recent snow profiles). Warming temps and increasing south winds will promote formation of a storm slab. Keep a keen eye out for changing conditions over the day.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
35cm of storm snow now covers the Nov 9 interface. Warming temps and increasing south winds will promote the formation of a storm slab. Keep a keen eye out for changing conditions over the day.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
35cm of storm snow now covers the Nov 9 interface, plus another 10cm falling today. Warming temps and increasing winds will promote slab formation. Keep a keen eye out for changing conditions over the day.
60cm of storm snow now covers the Nov 9 interface. The storm slab will need a couple of days to heal, as the upper snowpack bonds. The storm slab will be most problematic on exposed terrain features and unsupported convexities.
70cm+ covers the November 9th interface. The storm slab will need a few days to bond to old snow surfaces. The storm slab is going to be a problem to watch out for coming into this weekend.
Heavy snow loading and strong alpine winds have created a reactive storm slab in the alpine.&nbsp; This storm slab will need a few days to bond to old snow surfaces.&nbsp; This problem will persist through the weekend.
Heavy snow loading and strong alpine winds have created a reactive storm slab in the alpine. The storm slab will be more reactive in unsupported terrain and ridgetop terrain features exposed to wind loading.
Heavy snow loading and strong alpine winds have created a reactive storm slab.  Yesterday shooting cracks were observed in the alpine. The storm slab will be most reactive in unsupported terrain and features exposed to wind loading.
The weekend storm brought wind and snow in abundance forming a widespread storm slab.  Storm snow instabilities should slowly settle out but warming this afternoon may wake them again.
Last weekend's storm slab will be settling quickly. Weak layers down 40cm and 60cm and Nov 9th interface should awaken with rapid warming, increased precipitation and strong SW winds forecast today.
Intense loading of start zones combined with warm temperatures and significant rain or snow fall, has created touchy storm slabs.
Heavy snowfall with wind today will build a touchy storm slab. The Nov 23rd crust will be a good bed surface for avalanches to run on. Avalanches may run far on top of this layer.
New snow and winds have created a storm slab that sits atop a supportive crust down 30cm. This layer will become more reactive with ongoing loading from wind and snow. This is an evolving problem that requires careful evaluation and decision making.
20+ cm of new snow with moderate winds fell in the last 24 hours. Expect slab formation on exposed terrain features and unsupported convex rolls. The storm snow has buried old wind slabs, which could still be reactive on specific terrain features.
The storm slab continues to develop with ongoing snowfall. Deeper and more reactive pockets are expected in windloaded areas. The slab overlies a crust, and with limited observations it's hard to predict just how reactive it is.
The steady accumulation of new snow is settling into a reactive storm slab. It will be most reactive at ridgetop and in steep unsupported terrain. Expect avalanches to be run fast and to the bottom of run-outs. Be aware of overhead exposure!
Settling new snow and wind at ridgetop has created a reactive soft slab.&nbsp; Compression tests yesterday showed shears in the storm snow down 15 &amp; 30cm. In steep alpine terrain avalanches may run to the bottom of run-outs. Be aware of overhead exposure!
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">After a long dry spell, 15cm of new snow has fallen on </span><span class="s_2823317B">widespread surface hoar. </span><span class="s_AA239A9B">Another 25 is expected today! As this new snow settles into a cohesive slab, expect to see avalanche hazard spike! Also expect sluff to be heavy and fast!
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">After a long dry spell, 40cm of new snow has fallen on </span><span class="s_2823317B">widespread surface hoar.  </span><span class="s_AA239A9B">As this new snow settles into a cohesive slab, expect to see it become more reactive.  SW winds in the 30-45kph range have built windslab in the alpine.
Yesterday's storm snow is settling into a slab. It will be reactive in windy areas in the Alpine and exposed areas at Tree Line. Steep solar asp will be problematic, as there will be a crust under our slab and a Surface Hoar/Facet combo BTL.
Recent storm snow continues to settle into a slab.  Expect the slab to be increasingly sensitivity as you transition into wind effected terrain. Steeper solar slopes harbor a thin crust layer below the storm snow and a facet surface hoar combo BTL.
The 30cms of recent storm snow will remain touchy for loose avalanches in steep terrain. With all the available fetch, strong Northerly winds will have created soft slabs on lee slopes.&nbsp; Avalanches will have the potential to reach runouts today.
The 25cms of recent storm snow along with the available fetch and recent strong winds will have created pockets of slab on lee slopes. Based on observations yesterday, avalanches have the potential to reach out into runout zones.
The 25cms of recent storm snow along with the available fetch and recent strong winds will have created pockets of slab on lee slopes. Based on observations Dec 30, avalanches have the potential to reach out into runout zones.
30cm of snow over the past 48hrs is settling into a soft slab with warm winters temps (-1 to -5). The Jan 4 surface hoar is down ~35cm and found to be up to 15mm in size. If triggered, small avalanches could initiate deeper layers.
40+cm of storm snow over the past 48hrs is settling into a slab with warm temperatures (-1 to -5). The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, small avalanches could step down to the Dec 15th PWL!
45cm of recent storm snow is settling into a slab assisted by warm temperatures (-1 to -5). The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, small avalanches could step down to the Dec 15th PWL with big results.
45cm of recent storm snow has settled into a slab. The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, avalanches could step down to the Dec 15th PWL with potential for large avalanches.
A reactive storm slab sits atop the Jan 4 surface hoar interface. The slab is poorly bonded where the surface hoar is well preserved. If triggered, avalanches could step down to the Dec 15th persistent weak layer causing very large slides.
A reactive storm slab continues to build &amp; 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.
10cm of storm snow accompanied by mod-strong S'ly winds have formed fresh storm slab at and above treeline. These slabs reside on a variety of surfaces such as small surface hoar, temperature crust and sun crust.
Yesterday's field info found remote triggering the surface slab in some locations and no slab in others. Warming temps, more new snow and mod S-SW winds will increase the density  of the slab and sensitivity of the layer to human triggering.
The Jan 16 surface hoar is widespread and buried 30cm. Incremental loading combined with wind action has led to slab development over this weak interface. The January 4th surface hoar is down 60cm and could be triggered by a storm slab avalanche.
Previous strong Southerly winds combined with recent new snow has led to surface slab development. This buries the Jan 16 surface hoar layer which is widespread and found down 30cm. Slabs triggered over this weak layer could propagate far.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Previous strong south winds combined with recent new snow has built surface slab. This buries the Jan 16 surface hoar which is widespread and found down 40cm. Slabs triggered over this </span><a href="https://www.facebook.com/ParksMountainSafety/videos/1546933272023323/" target="_blank"><span class="s_9255B882">weak layer</span></a><span class="s_AA239A9B"> could propagate far and trigger deeper layers.
Strong south winds combined with recent new snow has formed pockets of wind slab. This buries the Jan 16 surface hoar which is widespread and found down ~50cm. Slabs triggered over this weak layer could propagate far and trigger deeper layers.
Storm slabs will be most prevalent in areas exposed to the wind and steep unsupported convexities, where there's tension on the snowpack. Storm slabs triggered could step down to deeper layers.
Storm slabs sit on a layer of surface hoar and/or a thin crust. They will be most sensitive in areas exposed to wind and unsupported convexities, where there's tension in the snowpack. Storm slabs triggered could step down to deeper weak layers.
Soft storm slabs sit on a layer of surface hoar and/or a thin crust. They will be most sensitive in areas exposed to wind and unsupported convexities, where there's tension in the snowpack. Storm slabs triggered could step down to deeper weak layers.
Heavy snowfall and warming temperatures will create a reactive storm slab. If triggered, the slab could step down to deeper weak layers. With steady snowfall accumulation in the last week expect to see avalanches gaining mass and running far.
Heavy snowfall created a reactive storm slab. Wind loading continues to overload this weakness. If triggered, the slab could step down to deeper weak layers. Avalanches are running full path.
Recent heavy snowfall has created a reactive storm slab. Wind transport has added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Recent heavy snowfall has created a storm slab in some locations. Wind transport added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Ongoing heavy snowfall has created a storm slab. Wind transport added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Ongoing heavy snowfall has created a storm slab. Strong to extreme South winds will have redistributed new snow into a touchy windslab in the Alpine &amp; at Treeline.&nbsp; If triggered, the slab could step down to deeper persistent weak layers.
Consistent snowfall has created a storm slab. Previous strong South winds have redistributed the new snow into a windslab in the Alpine and at Treeline. If triggered, the slab could step down to deeper persistent weak layers.
Consistent snowfall over the week has created a storm slab. Previous strong South winds have redistributed the new snow into a windslab in the Alpine. If triggered, the slab could step down to deeper persistent weak layers.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">With the extra 25cm of new snow and moderate winds, our storm slab is not getting the time it needs to heal. A layer of large stellars was found down 25cm yesterday, which could have been the culprit layer in regards to the </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://www.avalanche.ca/mountain-information-network/submissions/d6311b3e-980a-41a9-8008-eccec0377268" target="_blank"><span class="s_9255B882">skier accidental size 2!</span></a><span class="s_AA239
40cm new snow and mod winds, our storm slab is not getting time to heal. A layer of large stellars was found down 25cm Monday, which could have been the culprit layer in regards to the size 2 skier accidental slide reported Monday on McGill.
Another 40cm overnight adds to our storm slab which has reached its critical load. The storm slab will need some time to adjust, settle out and stabilize.
The last storm brought over 60cm of new snow in 48hrs. Storm slabs remain touchy and are still resulting in large natural avalanches, as recently as 0700 this morning. Expect the &quot;first kiss of the sun&quot; to trigger more storm slab avalanches.
The last storm brought over 60cm of snow in 48hrs. In the alpine, mod winds have built windslab. If triggered these slabs will propagate very wide. Cornices have also grown in size &amp; become more fragile in the last week, give them a wide berth!
The last storm brought 60cm+ of snow. In the alpine, strong winds have formed windslab. If triggered these slabs have potential to propagate. Cornices have grown in size &amp; become more fragile in the last week, avoid exposing yourself to this hazard.
30cm of storm snow has been fallen over night with moderate southwest winds building pockets of wind slab in the alpine and exposed treeline locations. The storm slab will be most reactive along ridge lines, convexities and steep unsupported terrain.
40cm in 48hrs, previous moderate winds have redistributed it into pockets of wind slab in the alpine and exposed treeline locations. Expect the storm slab to be most reactive along ridge lines, convexities and in steep unsupported terrain.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Natural and skier triggered avalanches are still resulting from this reactive storm slab problem.  Loading from moderate to strong southerly winds has increased the likelihood storm slabs being triggered and propagating, especially in exposed areas.
Natural and skier triggered avalanches are still resulting from this reactive storm slab problem. Loading from moderate to strong southerly winds has increased the likelihood storm slabs being triggered and propagating, especially in exposed areas.
Moderate S'ly winds and 20cm of storm snow all landing on a facetted old snow surface should make for reactive storm slab at and above treeline.  Lingering windslab is also a concern and will be hidden under the new snow.
Moderate S'ly winds and 25cm of storm snow all landing on a facetted old snow surface. Where wind touched watch for a reactive storm slab at and above treeline. Recently buried windslab is also a concern more so on steeper solar locations.
Storm slabs will be most prevalent in the Alpine and areas at treeline where exposed to the wind. Previous wind slabs are now buried and slowly starting to heal. Cornice failures have tapered off, but it's still recommended to give them a wide berth.
Around 10 cm of new snow fell overnight with another 5-10 possible today. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. This new slab buries an old windslab that was reactive on solar aspects.
Recent snowfall has created a touchy storm slab. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.
Storm snow has formed into a touchy storm slab. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.
Storm snow has formed a slab at ridgetop, wind exposed terrain or in steep unsupported rolls. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.
Isolated storm slabs could be found at ridgetop or features exposed to the wind. Solar radiation will trigger loose dry avalanches on steep sunny slopes and cliffs. These &quot;sluffs&quot; could trigger a soft slab or step down to a persistent weak layer.
Isolated storm slabs could be found at ridgetop or features exposed to the wind. Solar radiation will trigger loose dry avalanches on steep sunny slopes and cliffs. These &quot;sluffs&quot; could trigger a soft slab or step down to a persistent weak layer.
New snow and southerly winds have created reactive storm slabs. Slabs will be well-formed on lee features when wind has contributed to loading. These slabs are touchy and sensitive to human triggered loads as well as natural inputs like wind and sun.
Minuscule amounts of new snow fell with moderate winds overlying a solid snowpack. A storm slab may be most problematic where it's sitting on a crust and or on a surface hoar on a crust, where exposed to the wind.
15cm of recent snow and moderate winds have built a storm slab and may be most problematic where it's sitting on a crust, or on surface hoar over a crust where exposed to the wind.
Five cm of new snow fell overnight with Southerly winds gusting to 81 km/hr. Another 5cm is forecast today with sustained winds building windslab in lee features.  Pay close attention solar aspects where near surface crusts act as a good bed surface
20cm new snow with Southerly winds gusting to 80 km/hr has formed a storm slab. Another 10cm is forecast today with sustained winds building windslab in lee features. Pay attention on solar aspects where near surface crusts act as a good bed surface
60cm of storm snow buries a crust up to 2000m on all aspects and into the alpine on solar aspects. 30cm of new snow is settling quickly could be reactive to human presence. Moderate to strong winds have formed wind slabs on lee features.
60cm of storm snow buries a crust up to 2000m on all aspects and into the alpine on solar aspects. 30cm of new snow is settling quickly could be reactive to human presence. Moderate to strong winds have formed wind slabs on lee features.
With the help of strong south winds, the storm snow is forming into a cohesive slab. The slab sits on a variety of surfaces including a widespread crust below tree line, a crust on solar aspects, and isolated pockets of surface hoar on polar aspects.
With the help of strong south winds, the storm snow is forming into a cohesive slab. The slab sits on a variety of surfaces including a widespread crust below tree line, a crust on solar aspects, and isolated pockets of surface hoar on polar aspects.
Storm slabs may be susceptible to human triggering. Steep S aspects where the slab may sit on a sun crust and wind loaded features on N and E aspects are the main concern.
A layer of storm snow sits over windslab at and above treeline. Watch for wind loading in lee features. Expect these pockets around cornices, wind lips and roll overs. Solar input and a warming trend today may wake surface layers on S'ly aspects.
25cm of snow in the last 24hrs with strong to extreme winds has created widespread storm slabs on all aspects at Treeline and in the Alpine. Expect the strong winds to have scoured south aspects &amp; created firm windslabs on North facing slopes.
Over 30cm in last 48hrs initially accompanied by strong to extreme winds has created widespread storm slabs on all aspects at Treeline and in the Alpine. Expect the strong winds to have scoured S aspects &amp; created firm windslabs on N facing terrain.
Over 30cm in last 72hrs initially accompanied by strong to extreme S'ly winds has created storm slabs on all aspects at and above Treeline . Wind effect may have hardened the slab on alpine lee slopes. Today's snow may mask this problem.
Over 40cm in last 72hrs accompanied by mod to strong winds has created storm slabs on all aspects at and above treeline . Wind effect may have hardened the slab on alpine lee slopes. Today's snow may mask this problem.
There has been 72cm of new snow over the last 5 days at treeline. Last nights storm sits over 30 cm very light snow. Conditions are likely to be &quot;heavy over light&quot; increasing the likelihood of skier triggering.
There has been 75cm of new snow over the last 6 days at treeline.  Conditions are likely to be &quot;heavy over light&quot; increasing the likelihood of skier triggering.
23cm of new snow sits over an old snow interface that is not likely to bond quickly. This new snow will add to the sluffing that has been observed over the past week when triggered.
33 cm of new snow sits over variable weak layers such as surface hoar, sun crust or facets, depending on your aspect and elevation. These are ideal  layers for an avalanche to release on.
  Weak layers such as surface hoar, sun crust or facets, depending on your aspect and elevation, are now buried 40 to 60cm deep. These are in the range of skier triggering and wider propagation as the slab settles.
Up to 65cm of storm snow lies on a weak interface of surface hoar and sun crust.  These layers are very reactive to skier triggering.  A widespread avalanche cycle occurred overnight, and avalanche control is planned for today.
Up to 70 cm of storm snow lies on a weak interface of surface hoar and sun crust, burried on January 4.  Avalanche control yesterday produced many avalanches on this layer.  Storm snow will continue to be reactive to skier triggering
30cm of new snow has created storm slabs. These can be triggered by riders especially in steep terrain. Watch for wind effected snow on north/northeast slopes in open areas at treeline and in the alpine. Snow will be sluffing in steep treed terrain.
45cm of new snow has created storm slabs. These can be triggered by riders especially in steep terrain. Watch for wind effected snow on north/northeast slopes in open areas at treeline and in the alpine. Snow will be sluffing in steep treed terrain.
45cm of new snow has created storm slabs. These can be triggered by riders especially in steep, unsupported terrain. Watch for wind effected snow on north/northeast aspects at treeline and in the alpine. Be cautious of sluffing in steep terrain.
Recent storm snow is settling into a more cohesive slab. Watch for wind effect on north/northeast aspects. Surface hoar below 1800m was observed in some drainages now buried down 40cm, this may become more reactive with settlement.
Storm snow continues to settle into a more cohesive slab. 50cm sits on a sun crust on steep south and west aspects and over surface hoar below 1800m. Wind effect on north and east aspects may exist.
Storm snow continues to settle into a more cohesive slab. 50cm sits on a sun crust on steep south and west aspects and over surface hoar below 1800m. Wind effect may exist near ridge tops.
Rising winds overnight and lots of deep soft snow available for wind transport will create storm/wind slabs at treeline and in the alpine. Be aware of soft slab formation in the lee of features at ridgelines. These soft slabs are running end fan. 
Strong winds in the last 24hrs and lots of deep soft snow available for wind transport have created storm/wind slabs at treeline and in the alpine. Be aware of soft slab formation in the lee of features at ridgelines.
Skier triggerable slabs exist throughout the park. Recent strong southerly winds have loaded northerly aspects. Avoid lee and cross-loaded terrain near ridges where the wind has deposited firm snow.  Watch for shooting cracks as a sign of soft slabs.
Skier triggerable slabs exist throughout the park. Recent strong southerly winds have loaded northerly aspects. Avoid lee and cross-loaded terrain near ridges where the wind has deposited firm snow. Watch for shooting cracks as a sign of soft slabs.
Solar aspects are going get hit hard by the sun today. Natural avalanches are expected, particularly on steep slopes and around exposed rocks. It will also make skier triggering of the storm slab more likely. They may step down to a crust below.
Last weeks snow has settled into a slab. The layers of concern below vary by aspect, but are most likely to be triggered on steep southerly aspects where buried crusts exist. The slab is stubborn to trigger but large avalanches are possible.
Storm snow is easily triggered by skiers. It is still a soft slab in most places, but has the potential to propagate widely on a touchy layer of surface hoar.&nbsp; Below treeline, open glades may be very reactive.
Storm snow is easily triggered by skiers. It is still a soft slab in most places, but has the potential to propagate widely on a touchy layer of surface hoar.  Below treeline, open glades may be very reactive.
New snow has created touchy conditions.  Skiers could trigger avalanches today.  Use caution in steep terrain.  Watch for slab formation where wind has deposited firmer snow.  Cracking around skis is a clue slabby conditions are present.
Rapid loading by snow and wind is overloading the snowpack. Expect widespread natural avalanche activity, with large avalanches running into valley bottoms. Avalanches may step down to deeper persistent weak layers.
60cm of heavy storm snow is settling with mild temps. Rapid loading yesterday triggered widespread large avalanches. The snowpack needs time to adjust to the new load and will still be touchy to human triggering.
60cm of heavy storm snow is settling into a cohesive slab. Loading by wind and snowfall continues to trigger large avalanches. The snowpack needs time to adjust to the new load and will still be touchy to human triggering.
Over 80cm of snow has fallen since Friday. Weak interfaces within the storm slab exist. The snowpack needs time to adjust to the new load. It will still be touchy to human triggering, and may step down to surface hoar below.
Over 80cm of snow has fallen since Friday. Weak interfaces within the storm slab exist. The snowpack needs time to adjust to the new load. It will still be touchy to human triggering, and may step down to surface hoar below.
A storm overnight has brought 25-30 cm of new snow with strong winds and rising temperatures. This has formed avalanche conditions.
A storm that started on Wednesday has brought 30-45cm of high density new snow with strong winds and rising temperatures. This has formed avalanche conditions.
A storm that started on Wednesday has brought  40-60cm of high density new snow with strong winds and rising temperatures. This has formed avalanche conditions.
Last weeks warm and wet storm rapidly deposited 50-60cm of heavy, moist snow at treeline. This was deposited on low density snow sitting on a crust and or surface hoar and is bonding poorly. At lower elevations, rain saturated the upper snow.
A buried rain crust is providing an ideal bed surface for new snow avalanches below 2000m. There's around 30cm overtop and was really reactive yesterday to rider triggering with wide propagation, running far and fast.
Convective snow flurries with strong winds yesterday added load to the storm slab problem above treeline. Below 2000 meters, a buried rain crust is providing an ideal bed surface for new snow avalanches at lower elevations.
Another 8-10cm of snow overnight has added load to last weeks storm interface.  More snow, moderate winds and warm temps today will add to this problem, especially on solar aspects where buried suncrusts are providing good failure planes.
Multiple convective storms and frontal systems continue to add incremental load.  The reactivity of the storm slabs is variable.  We know that solar aspects are most reactive due to buried crusts, and north aspects received most load.
New snow is reactive to rider triggering.  Use caution in steep terrain and unsupported features.  Avalanches with large consequences may run on solar aspects. A sun crust is present down 30 cm.  Northerly aspects with wind loaded snow may be touchy.
40 cm of heavy moist storm snow overnight with steady south winds has created slabs at and above treeline.  This layer will be touchy today, especially as temperatures warm up.
New, storm snow can be skier triggered.  Up to 70 cm of storm snow has created a slab on top of a crust.  Below treeline this snow is moist.  Treeline and above, south winds have loaded lee features.
More snow is expected today increasing the avalanche hazard. A new surface hoar layer is down around 20cm under this new snow. It has widespread distribution and will be easily triggered by riders under this new load.
Winds are expected to increase today, expect soft slabs at higher elevations that will be easily triggered by riders as sits is over a surface hoar layer. Lower down sluffs can gain mass and have larger consequences than expected.
Our latest surface hoar/crust layer is down under 30 to 40cm of storm snow. Consequences of triggering will increase as the slab strengthens over time.
Slabs are forming in over 40cm of storm snow.  Use caution in terrain over 30 degrees. Rider triggering is possible.  Fast sluffing is likely and will pick up large amounts of snow.  Avoid exposure to terrain traps.
Soft slabs are forming in over 50 cm of storm snow.  Use caution in terrain over 30 degrees. Small avalanches could trigger deeper instabilities.  Fast sluffing is likely and will pick up large amounts of snow.  Avoid exposure to terrain traps.
Over 50cm of storm snow has created soft slabs.  Use caution in terrain over 30 degrees.  Small avalanches could trigger deeper instabilities.
As the storm continues to dump snow, with strong winds and warm temps, the storm slab is becoming deeper and more cohesive. There are reactive layers within and at the base of the slab that are likely to be triggered by skiers.
55-60cm of storm snow in the past week with mild temperatures have created ideal slab conditions.
This weeks storm deposited 80cm of snow under ideal slab forming conditions. This slab sits on a weaker surface that may be reactive to skiers and riders, and the slab is deep enough to produce large avalanches.
Snow load has been steadily increasing over the last few days. With rising temperatures, wind and more snow on the way, riders should expect to see snow slabbing up and becoming more reactive as the day progresses.
Storm snow amounts keep accumulating with another 12cm overnight. It will need some time for storm layers to bond.
40cm of recent storm snow is settling. Within this slab are layers of large, weak snowflakes that may be triggered by skiers/riders.
40cm of recent storm snow is settling. Within this slab are layers of large, weak snowflakes that may be triggered by skiers/riders or by rapid loading during the storm. If triggered, this slab may step down to deeper instabilities.
Alpine temps rose overnight to 0'C at 1900m, before dropping below freezing again. Recent storm snow will have become more cohesive. There are a few weak layers within this slab. Tests indicate that they may be triggered by light loads, like you.
60cm of storm snow is likely to be triggered by riders. Use caution in steep, unsupported terrain.
The recent storm snow has instabilities within it that will need a few days to heal.
Mild temperatures today will make slab formation more likely.
Another 25cm of new snow overnight. Snow loading has been steady for the past 5 days with instabilities in the upper snowpack.
Another 10cm in the last 24 hours continues to incrementally load the snowpack. Moderate winds have created soft slabs in exposed areas.
Storm slabs will become an issue at the peak of the incoming system. Strong winds and warm temp's accompanying the new snow will develop slabs quickly in exposed lee features at all elevations.
Storm slabs have formed at all elevations, likely up to a metre thick in alpine and tree-line lee areas. It will take a bit of time for these to settle into the snowpack.
40 to 60 cm of storm snow has formed slabs. These deposits will be deeper in areas with wind loading. Natural avalanches are still possible, assess terrain continually while you travel.
40 to 60 cm of storm snow has formed slabs. These deposits will be deeper in areas with wind loading. Natural avalanches are still possible, assess terrain continually while you travel.
A new storm slab is developing. The new snow is still loose and unconsolidated, but with mild temps and continued loading by new snow it will become more of a concern. Heads up if the snow starts to feel slabby. Watch for sluffing on steep slopes. 
60 to 70cm of storm snow has fallen over the past 3 days with strong southerly winds. Heavy density snowfall is rapidly loading a previous layer of low density snow causing storm slab formation.
Over 75 cm of heavy storm snow has fallen with moderate/strong southerly winds. This new snow is causing natural avalanches and is very touchy to human-triggering.
New overnight snow is exceptionally heavy with the mild temperatures we have. This snow is sitting over much lighter snow from earlier this week and the result is ideal slab conditions and weak layers for it to slide on.
Yesterdays blizzard deposited 35cm of heavy snow that is sitting over snow that is much lighter, including a buried surface hoar layer. This combination makes it more reactive to rider triggering until it has a chance to settle out.
Over a meter of new snow, combined with high winds and rising temps, have created a storm slab. It is sitting over snow that is much lighter, including a buried surface hoar layer. This slab will need some time to settle and bond.
Over a meter of new snow is about to get hit by lots of solar and above freezing temps right up to mountain top. Natural avalanches are expected from steep, solar aspects. In addition, the storm slab will likely be more reactive on sun exposed slopes
Natural avalanches are expected from solar aspects if the high, thin cloud breaks up. Over a metre of new snow may have trouble adjusting to intense sunshine and high freezing levels over the next 48hrs.
35cm of new snow has fallen onto a surface that will not bond easily. Triggering avalanches will not be difficult due to the nature of the recently buried weak layers.
50-60cm of storm snow overlies an old surface that will not bond well. Temperatures have increased and winds have picked up, creating stiffer slabs that are ripe to fail.
The storm slab overlies a weak surface and is not bonding well. Many avalanches have already slid on this interface, but if a slope has not released, it should be considered a ticking time-bomb.
The storm slab is just getting thicker and heavier on the underlying weak interface. Any large, open slope that has not slid should be treated with caution, as it awaits just that extra amount of load from a person.
A 100 cm storm slab sits on a weak layer.&nbsp; Skiers and riders will likely trigger this layer in avalanche terrain.&nbsp; Remote triggering is a concern, watch out for adjacent slopes.
20cm of additional load overnight totalling 1.2m over a weak layer which has been very reactive this past week. Riders have reported cracking, whoomphing and avalanches on this layer. This is in addition to any shallower storm snow instabilities.
As the slab over the weak layers down 100-140cm becomes more cohesive, it changes in how it reacts to a riders weight. The highly reactive stage may have passed but it is at a depth where triggering will be less frequent but much more dangerous.
As the slab over the weak layers down 100-140cm becomes more cohesive, it changes in how it reacts to a riders weight. The highly reactive stage may have passed, but it is at a depth where triggering is less frequent but much more dangerous.
The storm slab, which is 100-140cm thick and overlies a weak interface, is becoming more cohesive. However, the bond to the underlying interface is not showing much improvement. Skier triggering of this layer will have high consequence.
A touchy slab lurks on the slopes, and were easily triggered by field teams and artillery control at all elevations. As it becomes more cohesive from snow-load and warming temp's, we expect this slab to propagate easily.
Warming temps through the storm created a punchy storm slab that is sitting on a variety of weak surfaces. Avalanche control proved that this slab is reactive and produced large avalanches. The slab may be more reactive in wind-exposed terrain. 
60 to 80 cm of warm/moist snow has formed a rider triggerable slab. Natural avalanches are expected this afternoon with rising temperatures and more snow load. Remote triggering is also a concern, watch out for adjacent slopes.
80 to 100 cm of warm/moist snow has formed a rider triggerable slab. We are currently seeing natural avalanches in the storm snow, some running to end of runnouts. Minimize your exposure today by skiing in mature forest.
Lots of new snow, with wind, through the weekend will form a new storm slab. This slab will likely be most reactive where it overlies suncrust, but will also bury small surface hoar. If triggered, this slab may also step down deeper.
We've had a significant amount of snow overnight. Combined with the mild temperatures, the southerly winds which have started to pick up and the crust which it sits on, the new storm slab will be highly reactive to human triggering.
65cm has fallen over the last 4 days with strong winds yesterday. On solar aspects this has buried a thick sun crust. Venturing out into larger terrain is not a good idea at this point as this new load will need some stabilization time.
New snow overnight will have formed soft slabs in alpine and tree-line lee features. In wind-sheltered areas, it will likely be good quality skiing.
Yesterdays new snow bonded poorly to the snow below and became very reactive as the temps warmed up. Loose, moist avalanches were easily triggered by skiers. These avalanches were at the smallest &quot;knee-twisters&quot; but some grew to size 2.5.
20cm of new snow from earlier this week has bonded poorly to the snow below. It is especially reactive on solar aspects, where it is rapidly destabilized by even a little bit of sun. On lee aspects, soft slabs may exist from windloading by SW winds.
The recent storm slabs have been slow to bond and remain in the skier triggerable range. Lee aspects in the alpine and treeline elevations are the more likely areas for a slide to propagate. Low elevations may have possible moist sluffs.
We`ve had some incremental loading, 30cm in 3 days. The sun is expected to poke through the clouds today so expect conditions to become more dangerous as the day progresses, specially on the solar aspects if that happens.
The recent storm snow has not fully bonded to the underlying crust and surface hoar layer. Combined with the warm temp's, it has become a touchy surface slab that is reacting in higher elevation lee areas.
New snow in the past weak is possible to skier-trigger.  Watch for hard, wind-deposited snow on lee features in the alpine.  Storm slabs failing on crusts is possible at lower elevations.
Slopes that have been baking in the sun can fail as a slab on crusts and on higher alpine elevations on North lee aspects.
If the sun has been baking slopes, there is the possibility of a slab avalanche failing on buried crusts. In the alpine slab avalanches could be triggered on lee North apects.
Rapid warming with mixed rain and snow is leading to an increasing avalanche hazard.&nbsp; Recent storm snow may be sitting on good sliding surfaces such as surface hoar and crust.
This SH layer now sits below 20-30cm of new snow. A storm slab is developing at higher elevations and wind-exposed areas. These slabs will bond poorly to the SH interface. Avalanches on this layer may run farther than expected, easily entrain snow.
A 50cm slab sits over a very obvious surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere and is a very real threat to riders.
A 50cm slab sits over the December 17th surface hoar layer that reacted to human triggering yesterday. Sensitivity varies depending on drainage and elevation but the layer was observed to be almost everywhere.&nbsp; This layer is a real threat to riders.
A very touchy surface hoar layer is buried by a 50 to 70cm thick storm slab. This layer is widespread, and is likely to be triggered anywhere is has not yet failed. It is easily triggered by light loads (ie you), from distances of up to 100m away.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A widespread touchy surface hoar layer down 50 to 70cm is likely to be triggered anywhere it has not yet failed. As the slab overtop stiffens it becomes less likely to trigger but  propagation and consequences will increase. </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Moccasin%20Flats%202014-12-24.pdf" target="_blank"><span class="s_9255B882">click photo</span></a><span class="s_AA239
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A widespread touchy surface hoar layer down 50 to 80cm is likely to be triggered anywhere it has not yet failed. As the slab overtop stiffens it becomes less likely to trigger but propagation and consequences will increase.  </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/Moccasin%20Flats%202014-12-24.pdf" target="_blank"><span class="s_9255B882">click photo</span></a><span class="s_AA239
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. 
Although powdery in most places, 20-25cm of new snow is gaining cohesion. This layer has concealed recently formed wind slabs in exposed ares. Riders may be surprised by this layer, as these avalanches have the potential to trigger deeper layers.
50cm of recent storm snow with more in the forecast. Settlement and winds have formed soft slabs particularly at ridge crests. Winds are on the rise and expect conditions to become more sensitive as winds continue.
70cm of storm snow since the New Year, moderate south winds and warming temperatures all translates into a settling surface slab. This will be most likely in highly wind exposed areas such as ridgelines and crossloaded features.
The storm slab should be settling and stiffening with the warming temperatures.  The question is the bond to the old snow surface of colder recrystalized snow.  We currently think this interface is weak and ripe for triggering.
The bond of the recent storm snow continues to improve however given the right location could still be reactive to human triggering. Steeper windloaded features at and above treeline should be treated with respect.
There's 20-30cm of new snow overtop our latest surface hoar layer. This layer was observed to be widespread. As winds pick up and and the temperatures rise expect soft slabs to form and to be reactive to rider triggering.
~50cm of new snow overtop the widespread Jan 15 surface hoar layer. This layer was very reactive to human triggering yesterday. Expect this sensitivity to continue with the storm slab that formed overnight with the sustained strong southerly winds.
45cm+ of storm snow sits on the weak reactive January 15 surface hoar layer. Numerous natural avalanches to size 3 and skier triggered slides to size 2 have occurred over the last couple days on this layer.
40cm of new snow and strong southerly winds in have created a reactive storm slab. Expect storm slabs to be significantly thicker on lee features where snow has been transported by wind. This layer is easily triggered and will need time to stabilize.
We have 40cm of recent storm snow with very mild temperatures. Winds are strong in the alpine and its raining below 2000m.
We have up to 15mm or rain and 40cm of recent storm snow with very mild temperatures at all elevations.
40cm of storm snow was followed by 15mm of rain.&nbsp; This moist slab is likely to be touchy until temperatures drop below freezing.
Soft slabs will be more prevalent today due to steadier overnight winds.  ~35cm sits on a firm, smooth layer providing a good surface for avalanches to slide on. Exercise extra caution near ridge crests or cross loaded terrain features.
Storm snow will be redistributed by mod southerly winds on to alpine lee slopes and crossloaded features. This storm snow sits on a firm smooth surface especially below 2200m. Take time to assess the snowpack while approaching wind affected features.
At treeline and above a soft slab is forming which sits on a firm bed surface. This storm slab is triggerable, and may propagate widely. In areas sheltered from the wind the loose storm snow may sluff on steep slopes, gaining mass.
A soft slab is forming which sits on a firm bed surface. This storm slab is triggerable and may propagate widely due to buried surface hoar on a crust. Continued loading through the storm will increase reactivity and the size of resulting avalanches.&nbsp;
25-30cm of heavy snow over lighter snow will make conditions dangerous until the rain and snow stop and temperatures cool down.
Recent storm snow is settling into a slab and is bonding poorly where it overlies a crust. SW winds are increasing and are creating pockets of windslab at ridgetop. As freezing levels rise the slab may become more reactive.
The building load of storm snow is settling into a surface slab and is bonding poorly where it overlies a crust.  S through SW winds are creating pockets of fresh windslab at ridge top. Rising temps will increase reactivity of the storm slab.
20cm of new snow has added to the growing storm slabs at higher elevations. Strong SW'ly winds have magnified loading creating deeper, and touchier, pockets in lee areas. The storm slabs may be more reactive where they bond poorly to crusts below.
Up to 60cm of new snow exists at higher elevations. This new storm snow will get it's first &quot;kiss from the sun&quot; today, which often triggers avalanches. The storm slabs may be more reactive where they bond poorly to crusts below.
If we get significant amounts of snow today, along with winds, the new slabs will be particularly touchy, given that they will be sitting on a house of cards (surface hoar and crusts).
25cm of heavy new storm snow has combined with strong SW winds to form a slab over a touchy, widespread surface hoar layer. This slab is easily triggered by riders and has the potential to propagate into larger than expected avalanches.
25cm of heavy new storm snow has combined with strong SW winds to form a slab over a touchy, widespread surface hoar layer. This slab is easily triggered by riders and has the potential to propagate into larger than expected avalanches.
35cm of storm snow in past 48hrs along with warm temps and strong SW winds have formed storm slabs over a widespread weak surface hoar &amp; facet layer. If triggered there is potential for large slab propagation.
The Dec 2nd surface hoar layer is reaching critical overloading by the storm slab. Expect the storm slab to be reactive to both human and natural triggering.
The Dec 2nd surface hoar layer has reached critical load. Expect the storm slab to be reactive to both human and natural triggering.
The Dec 2nd surface hoar / crust layer has reached critical load. Expect the storm slab to be reactive to both human and natural triggering.
A 50-100cm thick slab overlies touchy surface hoar below treeline, and sun crust in the alpine. The surface hoar layer become more reactive at lower elevations. Expect the storm slab to be easy to trigger and capable of resulting in large avalanches.
A 50-100cm thick slab overlies touchy surface hoar below treeline, and sun crust in the alpine. The surface hoar layer becomes more reactive at lower elevations, and where it exists the storm slab will be easy to trigger.
30cm of new snow may bond poorly to the old snow surface.&nbsp; Currently new snow is low density but with rising temps and forecasted wind gusts a slab could build.
25-35cm of new, low density snow is being moved around by the winds at ridge-top. This is forming a slab in lee features, which will likely have a poor bond to the underlying interface of surface hoar, sun crust, or facets.
Where wind-affected, touchy soft slabs are forming. At lower elevations, mild temp's are settling the new snow into soft slabs as well. At all elevations, these thin slabs may pick up speed quickly, pushing folks into terrain traps.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 40cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer is easily triggered where it sits on preserved surface hoar crystals.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 40cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer was easily triggered in stability tests below treeline on surface hoar.
Storm slabs continue to develop as warm temps, wind and snow settlement turn the upper 50cm into a cohesive layer. Slabs are most developed in exposed alpine ares. This layer was easily triggered in stability tests below treeline on surface hoar.
Slabs continue to develop as warm temps, wind and settlement turn the upper 50cm into a cohesive layer. Below treeline the recent storm snow was easily triggered in stab tests on surface hoar.  Soft slabs are present in alpine areas exposed to wind.
The settling storm snow is still reactive to skier/riders weight below treeline. In the Alpine windslab has formed from moderate s'rly winds.  With sunny periods forecast today expect the new snow to be more reactive with the sudden solar warming.
A new storm slab is building. 30cm of snow over 48hrs at treeline, with another ~15cm forecast, is settling into a slab with mild temps. This slab may be triggered by light loads (like you) and avalanches on this layer may step down to deeper layers.
Up to 50cm fell in 48hrs and settled into a storm slab rapidly. SW winds will have loaded lee slopes, forming even deeper slabs. This slab may be triggered by light loads (like you) and avalanches on this layer may step down to deeper layers.
This layer is once again primed for triggering thanks to ongoing strong winds. In exposed areas, this layer is a cohesive slab up to 60cm thick. It may be triggered by light loads and avalanches on this layer may step down to deeper layers.
Expect the storm slab to be touchy after another night of moderate S-SW winds.  On lee features and exposed areas the cohesive slab could be upwards of 60cm thick.  If triggered slides may step down to deeper weak layers.
Since last weeks storm ~40cm of snow is forming into a storm slab. With more snow expected over the next few days this slab is thick enough to be a concern. In many areas it is still loose however in some areas tests indicate this slab is triggerable
~40cm of light snow remains loose in many areas and sluffs easily. As the storm progresses, it is expected settle into a slab with added snow, mild temps and SW winds. Watch for signs like &quot;upside-down&quot; feeling snow or cracking that indicate a slab.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
50cm of storm snow is settling into a slab with mild temps, added precip and wind.  Field trip to Lookout notch yesterday confirmed this with upside down feeling snow along with cracking of the surface layer.
Upwards of 50cm of storm snow will be settling into a denser slab over low density snow that fell early last week.  The storm slab can be expected to shear in unsupported terrain.
recent storm snow and wind deposits settling over a layer of lower density decomposing precipitation particles
Recent storm snow and wind deposits are settling rapidly over a layer of lower density decomposing precipitation particles. With the forecasted warm temps today this slab could become more reactive.
50cm of storm snow sits on isolated pockets of surface hoar and a curst on solar aspects.  Warm temps at low elevations and strong southerly winds have encouraged slab development. Stability tests show that this layer susceptible to skier triggering.
With up to 70cm of new snow at treeline and strong gusty winds over the last few days, expect avalanche conditions to be widespread. Human triggering is likely.
Skiers/boarders were triggering the storm slab yesterday. With an additional 15cm overnight and strong winds, this slab now packs a little more punch.
The storm slab will be a little more touchy once temp's warm up later in the day. It isn't the time to charge into aggressive terrain.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">The storm slab is settling, but a couple layers within the new snow show the </span><a href="https://www.facebook.com/ParksMountainSafety/videos/vb.145133538869977/942661439117179/?type=2&amp;theater" target="_blank"><span class="s_9255B882">potential for step-down</span></a><span class="s_AA239A9B"> to lower layers if a slab is triggered.
New, touchy storm slabs are forming with ongoing snowfall and wind-loading. On steep slopes, especially areas exposed to wind, expect slabs to be easily triggered. While they aren't very deep (yet) they move fast and can accumulate in terrain traps.
Touchy storm slabs have formed in some areas. On steep slopes, especially ridgecrests, roll-overs and areas exposed to wind, expect slabs to be easily triggered. These soft slabs move fast and can accumulate in terrain traps.
Sensitive storm slabs have recently formed in the forecast area. Ridge crests, convexities, steep features, wind and SOLAR exposed terrain are locations of particular concern. Expect these slabs to be easily triggered.
Storm slabs may be sensitive to human triggering given the right terrain feature.&nbsp; Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
Storm slabs may be sensitive to human triggering given the right terrain feature. Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
Storm slabs are generally gaining strength but may still be sensitive to human triggering given the right terrain feature. Steep planar slopes should be investigated before jumping in. Avoid unsupported or convex terrain.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a strong crust and surface hoar.  This low density slab has the potential to gain alot of mass with a widespread crust as the bed surface. </span><span class="s_2823317B">Afternoon sun will add to the likelihood of triggering
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a strong crust and surface hoar which is poorly bonded in some locations. Field teams experienced whumphing on this layer yesterday. This low density slab has potential to gain alot of mass with a crust as the bed surface</span><span class="s_28233
40cm of storm snow sits on a strong crust and surface hoar which is poorly bonded in some locations. Field teams experienced whumphing on this layer yesterday. This low density slab has potential to gain alot of mass with a crust as the bed surface
~50cm of snow is settling into a soft slab and sits on a crust on solar aspects and surface hoar. If triggered it will likely run far &amp; fast especially with the crust as a bed surface. Expect it to sluff easily in areas where it hasn't formed a slab.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">A 30-50cm deep storm slab has formed. It is expected to become increasingly reactive due to the strong solar. In addition, on solar aspects it overlies a sun crust which provides a sliding surface. On lee, N'ly slopes soft windslabs may exist. </span><span class="s_28233
A 30-50cm deep storm slab has formed. It is expected to become increasingly reactive due to the strong solar. In addition, on solar aspects it overlies a sun crust which provides a sliding surface. On lee features, watch for touchy wind slabs.
Moderate winds and significant snowfall should be creating sensitive storm slabs in the alpine and open areas at treeline.
Newly formed storm slabs should be treated as susceptible to human triggering. Once triggered it may overload the Nov 13 crust layer resulting in large avalanches.
While natural avalanche activity is tapering off, human triggered avalanches are still likely. Our new storm slab sits on previous wind slabs, combined this avalanche problem has the potential to step down to the Nov 13 Crust. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
30cm of storm snow is settling over a very weak old surface of facetted  snow. The surface slab will be sensitive to human and natural triggering especially in areas of wind effect as it overloads the weak layer.
50cm of storm snow with strong gusting winds is sitting over a very weak old surface of facetted snow. Cracking and whumphing was observed yesterday from groups out skiing. With additional snowload and settlement the surface slab will remain touchy
~80cm of storm snow is settling into a slab. It sits on a weak and reactive layer of facets and spotty surface hoar. Yesterday skiers accidentally triggered a storm slab avalanche, partially burying a member of the group. Human triggering is likely.
80cm of storm snow is settling into a slab. The storm snow is poorly bonded to a reactive layer of facets and spotty surface hoar.
Cold temperatures have kept recent storm snow light and powdery, but slab properties are beginning to form. The slab sits on the December 18 facet/ surface hoar down 50-60cm. Stability tests show that the storm slab is reactive to skier loads.
Recent storm snow has been slow to form a slab in part due to cold temps. Slab properties are starting to form.  The slab rests on the Dec 18 facet/surface hoar layer down 50-60cm.  Stability tests show that the storm slab is reactive to skier loads.
The recent storm snow has been slow to form a slab in part due to continued cool temperatures. Slab properties are starting to form and this is a concern given the Dec 18th facet/surface hoar weak layer down 50-60cm.
The recent storm snow has been slow to form a slab in part due to continued cool temperatures. Slab properties are starting to form and this is a concern given the Dec 18th facet/surface hoar weak layer down 50-60cm.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Up to 30cm of snow fell in the last 24hrs at treeline with another 15-25 expected today &amp; tonight. This new slab has buried a spotty surface hoar layer, that could be lurking. Expect this new load to take some time to stabilize.
50cm storm snow in 48hrs with flurries expected today. The storm snow has buried a spotty surface hoar layer to dig and look for. The new load will take a few days to stabilize.
60+ cm of new snow in the last 72 hours at tree line has created storm slabs most reactive at tree line and in the Alpine. The storm slab also stepped down to the Dec 18th interface yesterday on steep shallow southerly aspects with artillery control.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Since Thursday we have received 60cm+ snow at 1900m elevation which is settling into a slab. Expect the forming slab to be most reactive at and above TL. The storm slab did step down to the Dec 18th interface with artillery and explosive control.
15 cm of new snow in the last 24 hrs falls with moderate S winds is building a new slab.  Steady snowfall over the next few days will add load to this developing slab which sits on a weak layer of facets and surface hoar. 
35cm of new snow was accompanied by moderate S winds. This has created a new storm slab that is poorly bonded to a weak layer of facets and surface hoar. This slab will be reactive at all elevation bands, especially with the warm temp's today.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and reactive.
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and may become more reactive in the sun.
40 to 60cm of storm snow last week with warm temperatures and strong winds created a storm slab. This layer will need time to heal and bond to older surfaces like near surface faceting and wind slabs. </span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Storm slabs are most volatile near ridge crest and terrain exposed to the wind and lee features. Evaluate each slope independently, avoid steep, shallow, unsupported terrain, cornices and terrain traps.
Storm slabs are forming over a weak old snow surface that developed during the recent cold clear weather. Freshly formed slabs will be more sensitive to human triggering in wind exposed terrain.
30cm of storm snow overlies a variety of surfaces to which it may bond poorly. Skiers have triggered small, unsupported slopes. As the snow settles and forms a slab expect it to become more reactive and capable of propagating into larger avalanches.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">30cm of storm snow sits on a variety of surfaces to which it may bond poorly (</span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Profiles/20170207%20Balu%20Pass.png" target="_blank"><span class="s_9255B882">check out this snow profile</span></a><span class="s_AA239A9B">). As the snow forms a slab, and with new load from the storm expect it to become more reactive and capable of propagating into larger avalanches
Heavy loading from recent storms has created widespread storm slabs. With more snow and wind for today, natural avalanches on this layer are likely. This is a problem to avoid today, staying clear of large open avalanche terrain above tree line.
Widespread reactive storm slabs have formed. If triggered they have potential to run full path. Natural avalanche activity will taper off leaving slabs primed for human triggering.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Natural avalanche activity will taper off leaving slabs primed for human triggering.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Reports came in of whumphing &amp; low elevation slabs releasing below treeline yesterday.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">Widespread reactive storm slabs have formed from previous heavy snowfall and strong winds overnight! </span><span class="s_2823317B">If triggered they have potential to run full path</span><span class="s_AA239A9B">. Reports came in of whumphing &amp; low elevation slabs releasing below treeline yesterday.
The storm slab may become more sensitive to human triggering with rising freezing level to 2400m.  The other item to contend with will be the sun's  input on steep solar aspects warming the surface slab.
Over 40cm of new snow in the past 3 days has been combined with strong southerly winds to create widespread and touchy storm slabs.  Ongoing precipitation and wind activity could enable these slabs to step down and trigger deeper instabilities.
Over 65cm of new snow in the past 3 days has been combined with strong southerly winds to create widespread and touchy storm slabs. These slabs may step down and trigger deeper instabilities.
Widespread storm slabs were observed to fail at all elevations yesterday. Treat all slopes that have not failed as suspect. Keep your route to supported terrain with eyes open for natural or human-triggered avalanches.
Widespread storm slabs were observed to fail at all elevations yesterday. Treat all slopes that have not failed as suspect. Field teams yesterday noted low elevation slabs below treeline were still reactive aswell.
Widespread storm slabs were observed to fail at all elevations Sunday.  The storm slab needs time to bond to the old snow surface. Features that have not failed should be given a very cautious approach. 
Storm slab formation has been widespread and through all elevations. However its susceptibility to human triggering is highly variable. The bond to the old snow surface of crusts and facets is questionable.
Incremental loading this week + 15cm of new snow last night and warming temps today is producing a touchy storm. This storm slab can step down to deeper layers and run full path, which has already occurred this am in the HWY corridor!</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Steady snowfall this week (+15cm of new snow again last night) and warming temps today have produced a touchy storm. Yesterday this storm slab was able to step down to deeper layers and ran full path.
Steady snowfall this week (70cm in 3 days) and warming temps today have produced a touchy storm. Yesterday this storm slab was able to step down to deeper layers and ran full path.
Steady snowfall this week (70cm in 3 days) and warming temps today have produced a touchy storm. Yesterday this storm slab was very reactive and resulted in numerous full path avalanches.
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</style><p class="p_CC664AAA"><span class="s_AA239A9B"> 80cm of recent snowfall and warming temps yesterday and today are forming a </span><a id='GoToAdded' href="http://www.pc.gc.ca/apps/links/goto_e.asp?destination=http://data.avalanche.ca/Images/20170313%20Mounds.JPG" target="_blank"><span class="s_9255B882">reactive storm slab</span></a><span class="s_AA239A9B">. Numerous full path avalanches have occurred in the last 48hrs.
The recent storm snow is rapidly settling into a touchy storm slab, sensitive to both natural and human triggering. The slabs may be more touchy on recently loaded lee features.
Substantial snow and rain fell over the last 6 days! Rain on new snow then more new snow is a perfect combination for avalanches! Once commenced these storm slabs can step down to deeper layers in the snow pack, resulting in full depth avalanches.
Heavy precipitation combined with wind and warm temperatures have formed reactive storm slabs at all elevations. Although natural avalanche activity has subsided, these slabs remain triggerable by human loads!
Heavy precipitation combined with wind and warm temperatures have formed reactive storm slabs at all elevations. Added snowfall from last night and today will see these slabs become more active once again.
Heavy snowfall and extreme SW winds formed reactive storm slabs at tree-line and alpine elevations. These overlie various weak interfaces in the upper snowpack and need time to readjust to the new load.
Last weekend's storm slab will be settling quickly. Weak layers down 40cm and 60cm and Nov 9th interface should awaken with rapid warming, increased precipitation and strong SW winds forecast today.
Heavy snowfall with wind today will build a touchy storm slab. The Nov 23rd crust will be a good bed surface for avalanches to run on. Avalanches may run far on top of this layer.
New snow and winds have created a storm slab that sits atop a supportive crust down 30cm. This layer will become more reactive with ongoing loading from wind and snow. This is an evolving problem that requires careful evaluation and decision making.
The steady accumulation of new snow is settling into a reactive storm slab. It will be most reactive at ridgetop and in steep unsupported terrain. Expect avalanches to be run fast and to the bottom of run-outs. Be aware of overhead exposure!
Settling new snow and wind at ridgetop has created a reactive soft slab.&nbsp; Compression tests yesterday showed shears in the storm snow down 15 &amp; 30cm. In steep alpine terrain avalanches may run to the bottom of run-outs. Be aware of overhead exposure!
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">After a long dry spell, 15cm of new snow has fallen on </span><span class="s_2823317B">widespread surface hoar. </span><span class="s_AA239A9B">Another 25 is expected today! As this new snow settles into a cohesive slab, expect to see avalanche hazard spike! Also expect sluff to be heavy and fast!
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</style><p class="p_CC664AAA"><span class="s_AA239A9B">After a long dry spell, 40cm of new snow has fallen on </span><span class="s_2823317B">widespread surface hoar.  </span><span class="s_AA239A9B">As this new snow settles into a cohesive slab, expect to see it become more reactive.  SW winds in the 30-45kph range have built windslab in the alpine.
Yesterday's storm snow is settling into a slab. It will be reactive in windy areas in the Alpine and exposed areas at Tree Line. Steep solar asp will be problematic, as there will be a crust under our slab and a Surface Hoar/Facet combo BTL.
Recent storm snow continues to settle into a slab.  Expect the slab to be increasingly sensitivity as you transition into wind effected terrain. Steeper solar slopes harbor a thin crust layer below the storm snow and a facet surface hoar combo BTL.
The 30cms of recent storm snow will remain touchy for loose avalanches in steep terrain. With all the available fetch, strong Northerly winds will have created soft slabs on lee slopes.&nbsp; Avalanches will have the potential to reach runouts today.
The 25cms of recent storm snow along with the available fetch and recent strong winds will have created pockets of slab on lee slopes. Based on observations yesterday, avalanches have the potential to reach out into runout zones.
The 25cms of recent storm snow along with the available fetch and recent strong winds will have created pockets of slab on lee slopes. Based on observations Dec 30, avalanches have the potential to reach out into runout zones.
30cm of snow over the past 48hrs is settling into a soft slab with warm winters temps (-1 to -5). The Jan 4 surface hoar is down ~35cm and found to be up to 15mm in size. If triggered, small avalanches could initiate deeper layers.
40+cm of storm snow over the past 48hrs is settling into a slab with warm temperatures (-1 to -5). The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, small avalanches could step down to the Dec 15th PWL!
45cm of recent storm snow is settling into a slab assisted by warm temperatures (-1 to -5). The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, small avalanches could step down to the Dec 15th PWL with big results.
45cm of recent storm snow has settled into a slab. The Jan 4 surface hoar is down ~45cm and found to be up to 15mm in size. If triggered, avalanches could step down to the Dec 15th PWL with potential for large avalanches.
A reactive storm slab sits atop the Jan 4 surface hoar interface. The slab is poorly bonded where the surface hoar is well preserved. If triggered, avalanches could step down to the Dec 15th persistent weak layer causing very large slides.
A reactive storm slab continues to build &amp; 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.
Yesterday's field info found remote triggering the surface slab in some locations and no slab in others. Warming temps, more new snow and mod S-SW winds will increase the density  of the slab and sensitivity of the layer to human triggering.
The Jan 16 surface hoar is widespread and buried 30cm. Incremental loading combined with wind action has led to slab development over this weak interface. The January 4th surface hoar is down 60cm and could be triggered by a storm slab avalanche.
Strong south winds combined with recent new snow has formed pockets of wind slab. This buries the Jan 16 surface hoar which is widespread and found down ~50cm. Slabs triggered over this weak layer could propagate far and trigger deeper layers.
Storm slabs sit on a layer of surface hoar and/or a thin crust. They will be most sensitive in areas exposed to wind and unsupported convexities, where there's tension in the snowpack. Storm slabs triggered could step down to deeper weak layers.
Heavy snowfall and warming temperatures will create a reactive storm slab. If triggered, the slab could step down to deeper weak layers. With steady snowfall accumulation in the last week expect to see avalanches gaining mass and running far.
Heavy snowfall created a reactive storm slab. Wind loading continues to overload this weakness. If triggered, the slab could step down to deeper weak layers. Avalanches are running full path.
Recent heavy snowfall has created a reactive storm slab. Wind transport has added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Recent heavy snowfall has created a storm slab in some locations. Wind transport added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Ongoing heavy snowfall has created a storm slab. Wind transport added to the load on lee slopes at and above treeline. If triggered, the slab could step down to deeper persistent weak layers.
Ongoing heavy snowfall has created a storm slab. Strong to extreme South winds will have redistributed new snow into a touchy windslab in the Alpine &amp; at Treeline.&nbsp; If triggered, the slab could step down to deeper persistent weak layers.
Consistent snowfall has created a storm slab. Previous strong South winds have redistributed the new snow into a windslab in the Alpine and at Treeline. If triggered, the slab could step down to deeper persistent weak layers.
The last storm brought over 60cm of new snow in 48hrs. Storm slabs remain touchy and are still resulting in large natural avalanches, as recently as 0700 this morning. Expect the &quot;first kiss of the sun&quot; to trigger more storm slab avalanches.
The last storm brought over 60cm of snow in 48hrs. In the alpine, mod winds have built windslab. If triggered these slabs will propagate very wide. Cornices have also grown in size &amp; become more fragile in the last week, give them a wide berth!
The last storm brought 60cm+ of snow. In the alpine, strong winds have formed windslab. If triggered these slabs have potential to propagate. Cornices have grown in size &amp; become more fragile in the last week, avoid exposing yourself to this hazard.
30cm of storm snow has been fallen over night with moderate southwest winds building pockets of wind slab in the alpine and exposed treeline locations. The storm slab will be most reactive along ridge lines, convexities and steep unsupported terrain.
40cm in 48hrs, previous moderate winds have redistributed it into pockets of wind slab in the alpine and exposed treeline locations. Expect the storm slab to be most reactive along ridge lines, convexities and in steep unsupported terrain.</span></p><p class="p_CC664AAA"><span class="s_AA239A9B">
Natural and skier triggered avalanches are still resulting from this reactive storm slab problem.  Loading from moderate to strong southerly winds has increased the likelihood storm slabs being triggered and propagating, especially in exposed areas.
Natural and skier triggered avalanches are still resulting from this reactive storm slab problem. Loading from moderate to strong southerly winds has increased the likelihood storm slabs being triggered and propagating, especially in exposed areas.
Moderate S'ly winds and 25cm of storm snow all landing on a facetted old snow surface. Where wind touched watch for a reactive storm slab at and above treeline. Recently buried windslab is also a concern more so on steeper solar locations.
New snow and southerly winds have created reactive storm slabs. Slabs will be well-formed on lee features when wind has contributed to loading. These slabs are touchy and sensitive to human triggered loads as well as natural inputs like wind and sun.
Five cm of new snow fell overnight with Southerly winds gusting to 81 km/hr. Another 5cm is forecast today with sustained winds building windslab in lee features.  Pay close attention solar aspects where near surface crusts act as a good bed surface
20cm new snow with Southerly winds gusting to 80 km/hr has formed a storm slab. Another 10cm is forecast today with sustained winds building windslab in lee features. Pay attention on solar aspects where near surface crusts act as a good bed surface
60cm of storm snow buries a crust up to 2000m on all aspects and into the alpine on solar aspects. 30cm of new snow is settling quickly could be reactive to human presence. Moderate to strong winds have formed wind slabs on lee features.
With the help of strong south winds, the storm snow is forming into a cohesive slab. The slab sits on a variety of surfaces including a widespread crust below tree line, a crust on solar aspects, and isolated pockets of surface hoar on polar aspects.
With the help of strong south winds, the storm snow is forming into a cohesive slab. The slab sits on a variety of surfaces including a widespread crust below tree line, a crust on solar aspects, and isolated pockets of surface hoar on polar aspects.
Storm slabs may be susceptible to human triggering. Steep S aspects where the slab may sit on a sun crust and wind loaded features on N and E aspects are the main concern.
Over 30cm in last 48hrs initially accompanied by strong to extreme winds has created widespread storm slabs on all aspects at Treeline and in the Alpine. Expect the strong winds to have scoured S aspects &amp; created firm windslabs on N facing terrain.