Avalanche Forecast
Issued: Feb 28th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
Cory Boschman,
Incoming snowfall amounts vary significantly between forecasts. The only consistency is that it's going to be windy.
Avoid wind-loaded features as the recent and new wind slabs will probably not bond well to the facetted snow pack.
Summary
Weather Forecast
Monday: Flurries. Accumulation: 8 cm. Alpine temperature: High -6 C. Ridge wind southwest: 25 km/h gusting to 75 km/h.
Tuesda:y Flurries. Accumulation: 6 cm. Alpine temperature: Low -8 C, High -6 C. Mostly light ridge wind occasionally gusting to 50 km/h.
Snowpack Summary
Widespread wind effect in open areas at all elevations. Leeward features have wind slabs that are well down into the terrain, and windward aspects have been heavily stripped. The snowpack below the alpine is faceted with depth hoar near the base and is failing in test results.
Avalanche Summary
No new avalanches have been observed in the last couple days, but visibility has been limited. There has been a wind slab avalanche cycle in the last week from the extreme winds. Most avalanches were size 2 and in the alpine below ridge tops with one size 3 noted that ran down below treeline.
Confidence
Intensity of incoming weather systems is uncertain on Monday
Problems
Wind Slabs
Wind slabs in the alpine and exposed treeline features have the potential for wide propagations across connected features.
- If triggered the wind slabs may step down to deeper layers resulting in large avalanches.
- Be aware of the potential for wide propagations due to the presence of hard windslabs.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
Caution in thin facetted snowpack areas where triggering is more likely. This is a low probability but high consequence problem.
- Avoid shallow snowpack areas where triggering is more likely.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 1st, 2021 4:00PM
