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Archived

Avalanche Forecast

Jan 31st, 2012–Feb 1st, 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
2: Moderate
The avalanche danger rating at treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Good skiing can be found in protected areas below treeline. Watch for surface sluffing that can push you over. Be cautious of tree wells, which are becoming deep and large.

Avalanche Problems

Storm Slabs

85cm of storm snow accumulated over the past week sits on a cold snow interface. Within the storm snow, "heavy over light' layers exist. Moderate precipitation forecast for today (5-15cm locally) will continue to load these weak interfaces.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 4

Wind Slabs

Moderate to strong S-SW winds continue to prevail resulting in a series wind slabs on exposed terrain. New wind slabs are forming, and old ones have been buried. Major drifting and cross loading have been observed.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Cornices

A series of storms have provided lots of snow for transport by sustained southerly winds. Cornices are getting very large, and when they fail will provide large triggers capable of triggering deep layers and large avalanches.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 3 - 4