Avalanche Forecast
Issued: Apr 18th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Cornices.
JSmith,
Avalanche Canada
Forecast snow and strong southwest winds Monday night may form wind slabs reactive to human triggers.
Expect the danger to be Considerable in localized areas that receive more than 20 cm of new snow Monday night.
Summary
Confidence
High -
Weather Forecast
Monday night: Snow; 10-15 cm / Strong southwest wind / Low of -9 / Freezing level 900 m.
Tuesday: Mix of sun and cloud / Light southwest wind / High of -1 / Freezing level 1400 m.
Wednesday: Sunny / Light southeast wind / High of 3 / Freezing level 1800 m.
Thursday: Mix of sun and cloud / Light southwest wind / High of 2 / Freezing level 1700 m.
Avalanche Summary
No new avalanches were reported on Sunday.
Snowpack Summary
10-15 cm of new snow and strong southwest winds are forecast for Monday night. This may form small wind slabs reactive to human triggers on lee features at treeline and above.
The recent snow is sitting on a variety of hard snow surfaces, including crusts and wind scoured snow. Below this, there are several crusts in the upper snowpack, but they are unlikely to be a concern in most areas until the next significant warming event.
Terrain and Travel
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- Use ridges or ribs to avoid areas of wind loaded snow.
- Make observations and assess conditions continually as you travel.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
- Back off slopes as the surface becomes moist or wet with rising temperatures.
Problems
Wind Slabs
Forecast snow and strong southwest winds Monday night may form small wind slabs reactive to human triggers.
These slabs are most likely to form on lee features at treeline and above.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
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: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 19th, 2022 4:00PM
