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Archived

Avalanche Forecast

Jan 8th, 2012–Jan 9th, 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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

Some weather forecasts are calling for 20-30 cm of new snow in the next 36 hours with moderate SW winds. If this occurs watch for a rise in avalanche hazard through the day.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

These hard windslabs are between 10 and 25cm deep. Any new snow may hide these windslabs that up until recently have been active. It may still be possible to trigger this layer in select features from a thin edge of the slab.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Deep Persistent Slabs

This layer may become more active and more sensitive to trigger with the forecasted snow and moderate SW winds for tonight and Monday. Cornice failures or new load from snow or wind may trigger large avalanches (see MCR on Stanley area).

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3

Persistent Slabs

A surface hoar layer down 70-100 cm has been found in Kootenay, Sunshine, Takakkaw falls, and BJ highway. It's isolated in distribution. It varies between unreactive to stubborn in tests, but shears cleanly when it goes.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 3