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Archived

Avalanche Forecast

Mar 6th, 2012–Mar 7th, 2012
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Jasper.

Intense solar radiation may dramatically decrease stability on South exposed slopes on Wednesday. Very tricky avalanche conditions exist including 50 cm of new storm snow, building wind slabs and a well preserved buried surface hoar layer.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

The weather pattern is stable on Wednesday

Avalanche Problems

Storm Slabs

50 cm of snow fell during the latest storm. A widespread avalanche cycle resulted. This new snow is sitting on a well developed surface hoar layer. This instability will be a concern for a long time! Conservative decision making is essential.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 2 - 4

Wind Slabs

Moderate NW winds have begun to redistribute the recent 50 cm of storm snow into wind slabs on alpine and open treeline slopes. These slabs will be reactive. Avoid wind loaded slopes.

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Persistent Slabs

Open slopes on Northeast to South aspects have buried slabs sitting on surface hoar. On southerly aspects, the surface hoar formed on a sun crust, increasing the possibility of remote triggering and wide propagations.

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 4