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Archived

Avalanche Forecast

Feb 3rd, 2012–Feb 4th, 2012
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

Fantastic skiing can be found on sheltered slopes right now! The big concerns this weekend are warm alpine temp's and strong solar radiation weakening sunny aspects with daytime warming. Go early to beat the heat and have a great weekend!

Avalanche Problems

Wind Slabs

Recent strong SW winds have created windslabs up to a metre thick on lee slopes in the alpine (primarily N- E aspects). These slabs are settling out with warm temps, but it is still possible for a skier to trigger these slabs in thin zones.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Cornices

The warm alpine temp's forecasted may be the straw that broke the cornice's back. If cornices do fail, it may be a big enough trigger to step down into the basal facets. Natural cornice avalanches and sluffing were observed today in extreme terrain.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Persistent Slabs

In many areas east of the divide where the snow is shallower the mid-pack overrides a layer of weak basal facets. Be extra cautious of thin snowpack areas where the chance of triggering this layer is highest, especially on sunny aspects with warming.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2 - 4