http://www.pc.gc.ca/apps/scond/cond_e.asp?oid=30728&opark=100092Human triggered avalanches are still likely.
Weather Forecast
Sunny with cloudy periods today along with light ridge winds and alpine temperatures a chilly -17C. Monday expect cloudy with sunny periods and no precipitation. Tuesday a pulse of moisture is forecast to bring us ~10cm of snow and a little warmer temperatures.
Snowpack Summary
Approximately 60cm of snow from the past storm has settled into a widespread storm slab. Strong winds in the alpine have created variable wind slab in the alpine and in exposed areas at treeline. Dec and Jan persistent weak layers are now buried 150-200cm in the snowpack. Height of snow is 350cm at treeline.
Avalanche Summary
Numerous natural and artillery controlled avalanches to sz 4.0 occurred during Thursday's storm. Several ran full extent, taking out mature trees. Friday avalanche control just west of the park produced more large destructive size 4 avalanches. While natural activity has tapered off, human triggered avalanches are likely given the right location.
Confidence
Intensity of incoming weather systems is uncertain on Tuesday
Problems
Storm Slabs
Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.
Persistent Slabs
Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.