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Archived

Avalanche Forecast

Jan 26th, 2012–Jan 27th, 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
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: Glacier.

A series of storms will pass through the area today through the weekend, with a slight break tomorrow. Moderate winds and continued loading today will keep the hazard elevated. Another system forecast for the weekend will bump up the hazard again.

Avalanche Problems

Storm Slabs

Another 20cm of new snow fell overnight with south winds. 40-60cm of storm snow now rests on the cold snow interface (Jan 20). Numerous large avalanches to size 3.5 are failing on this layer.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 2 - 4

Loose Dry

In protected areas below treeline, unconsolidated storm snow will sluff on steep terrain with potential for significant mass. Tree wells will be deep, and snow will easily pile up in terrain traps.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Wind Slabs

Intense S-SW winds yesterday soured windward slopes, and likely created hard slabs in many alpine areas. Heavy drifting and loading can be expected at treeline on lee aspects.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3