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Archived

Avalanche Forecast

Jan 21st, 2012–Jan 22nd, 2012
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
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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Avalanche danger will increase today. A frontal system will shock-load the snowpack: temperatures will rise significantly (20 degree change in 24hrs), moderate precipitation (another 10-15cm forecast today) and SW'ly winds will increase.

Avalanche Problems

Loose Dry

25 cm of very light density new snow overlies small facets on soft slabs. Yesterday's field teams were remotely triggering small sluffs, indicating this interface is very touchy. The new snow will sluff in steep terrain and slab as temps rise.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Wind Slabs

10-15cm thick soft slabs were formed by variable winds on exposed terrain. They are now hidden under 25cm of new snow and will be harder to identify. Expect them on all open slopes and use caution on cross loaded and gully features today.

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

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 3