Avalanche Forecast
Issued: Apr 21st, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs, Cornices and Loose Wet.
JSmith,
Avalanche Canada
Lingering wind slabs may remain reactive to human triggers on lee features in the alpine.
Carefully evaluate steep lines for wind slabs.
Summary
Confidence
Moderate - Uncertainty is due to the limited number of field observations.
Weather Forecast
Thursday night: Mostly cloudy / Light southwest wind / Low of -5 / Freezing level 1000 m.
Friday: Mix of sun and cloud / Light west wind / High of 3 / Freezing level 1800 m.
Saturday: Mostly sunny / Light southwest wind / High of 5 / Freezing level 2000 m.
Sunday: Mix of sun and cloud / Moderate south wind / High of 5 / Freezing level 2100 m.
Avalanche Summary
No new avalanches were reported on Wednesday.
A small (size 1) wind slab avalanche that was remotely triggered by skiers below a ridgetop was reported on Tuesday. See MIN.
We currently have very limited avalanche observation data from this region.
Please consider posting your observations to the Mountain Information Network (MIN). Photos of current conditions and avalanches are the most helpful.Â
Snowpack Summary
5-20 cm of recent snow and moderate southwest winds have formed wind slabs that may remain reactive to human triggers below alpine ridgetops.
The recent snow is sitting on a variety of hard snow surfaces, including crusts and wind scoured snow.Â
Below this, there are several crusts in the upper snowpack that may have the potential to produce large avalanches during the next significant warming event.
Terrain and Travel
- Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
- Caution around slopes that are exposed to cornices overhead.
- Back off slopes as the surface becomes moist or wet with rising temperatures.
- Make observations and assess conditions continually as you travel.
Problems
Wind Slabs
Recent moderate southerly winds have formed wind slabs that may remain reactive to human triggers on lee features on the alpine.
Use ridges or ribs to avoid areas of wind loaded snow.
Aspects: North, North East, East, West, North West.
Elevations: Alpine.
Likelihood
Expected Size
Cornices
Cornices may be weak and reactive to human triggers. They create a significant falling hazard, and may produce large slab avalanches as they fall onto the slope below.
Cornice failures are more likely during hot and sunny weather.
Aspects: North, North East, East, West, North West.
Elevations: Alpine.
Likelihood
Expected Size
Loose Wet
Small wet loose avalanches should be expected on steep, solar aspects when the sun comes out.
Avoid big, steep, alpine slopes that are getting cooked by the sun.
Aspects: East, South East, South, South West, West.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Apr 22nd, 2022 4:00PM
