Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Dec 29th, 2011–Dec 30th, 2011
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Banff Yoho Kootenay.

Another storm on Friday should deliver 15-20cm of snow, along with strong SW winds. Numerous natural avalanches were observed today in the alpine, including a large size 3 over the ice climb Bourgeau Left. These will continue with additional snow.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Avalanche Problems

Wind Slabs

In most areas, storm snow amounts are now about 30 to 50 cm. SW winds have created soft slabs up to 60 cm deep. These are touchy and are running long distances. Avalanche control on Mt Whymper produced avalanches to size 3 running to valley-bottom.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Deep Persistent Slabs

This layer seems to be activating with the additional load. Avalanche control on the Lake Louise Ski Hill saw slabs stepping down into the facets in shallow, rocky areas. A large windslab release has the potential to step down into these facets.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Storm Slabs

Distribution of this layer is spotty but mostly on the west side of the Divide.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2