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Archived

Avalanche Forecast

Jan 23rd, 2012–Jan 24th, 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
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
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high

Regions: Glacier.

A front developing in the Pacific will move into the area on Tuesday bringing strong SW'ly winds and moderate to high precipitation. Avalanche danger will rise. Should the storm arrive earlier, danger will be higher than forecast on Tuesday.

Avalanche Problems

Storm Slabs

50 cm of low density snow was deposited on Fri and Sat. With mild temps and increasing wind it is forming a cohesive storm slab. It overlies small facets on soft slabs. Skiers are reporting cracking in open areas at all elevations.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 4

Wind Slabs

Winds have remained moderate to strong from south. With 50 cm of light snow available for transport, expect windloading and softslabs on exposed terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Loose Dry

Where unaffected by wind, 50 cm of low density snow will sluff easily. These loose avalanches move very quickly and pick up mass as they travel. They should not be underestimated.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2