{"blocks":[{"key":"7uog8","text":"Incoming warm air may ride on top of colder air in the valleys, so the snowpack may experience above zero temperatures at higher elevations, where you may not expect them. If this warming occurs and the sun comes out, the alpine snowpack could experience some rapid change for the worse. ","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"81buc","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"3rcg5","text":"Up to 15 cm of new storm snow fell Thursday with fairly light winds. Moderate to strong winds from the southwest on Friday formed fresh and reactive wind slabs. Wind slabs may be more reactive where they sit above older wind-affected and crusty surfaces. Around 2200 m and below, a crust caps the dense 15 to 30 cm of snow which has settled significantly with the past mild temperatures. The crust varies with aspect and elevation from thin (2 cm thick) in the alpine to (4 cm) thick below treeline. Below this, the midpack is well consolidated above the early December crust/ facet interface.  ","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"d12gi","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"1q0fc","text":"The most notable layer of concern in the snowpack is a widespread crust that was formed in early December and is now down 100-270 cm. With warming last week this deep persistent slab problem woke up and produced several very large avalanches. The forecast warm weather and sunshine this weekend is concerning and we could see this avalanche problem wake up yet again. Warming, solar radiation, and cornice fall could all play a role in triggering deep persistent slabs. ","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":162,"length":28,"key":0}],"data":{}}],"entityMap":{"0":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/glossary#deep-persistent-slab"}}}}