Avalanche Forecast
Issued: Dec 7th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
ross campbell,
Stormy weather, strong winds, and new snow have increased the hazard to Considerable at higher elevations.
Summary
Weather Forecast
~15cm of new snow and strong SW winds are forecasted for Tuesday evening, with cool temperatures. Another 10cm is likely to fall throughout the day on Wednesday with similar strong winds and cool temperatures again. Continued light precipitation is forecasted for the remainder of the week.
Snowpack Summary
At tree line and below, the Dec 1 crust is buried by 10-40cm of snow. In the alpine, 35-50cm of snow has been redistributed by moderate Westerly winds and either lies on previous wind effect or icy bed surfaces from last weeks avalanche cycle. The mid and lower snowpack is rounded and well bonded. Travel conditions at lower elevations is rugged.
Avalanche Summary
No new avalanches were observed in the Highway Corridor, or reported from the Backcountry yesterday. Unreactive wind slabs were noted in a MIN report from Young's Peak, ~10cm deep with no propagation. On Sunday a field team skier triggered a size 1 soft slab in steep, unsupported terrain where the new snow sat on the Dec 1 crust.
Confidence
Problems
Wind Slabs
Strong wind and new snow tonight, will form slabs in the Alp and exposed features at TL. Avalanches will be most prominent on lee slopes and in cross-loaded terrain features; however, local topography will dictate where the slabs ultimately lie.
- Use caution in lee areas. Recent wind loading has created wind slabs.
- Use caution above cliffs and terrain traps where small slab avalanches may have severe consequences.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 8th, 2021 4:00PM
