Archived

Avalanche Forecast

Apr 21st, 2012–Apr 22nd, 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

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

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.

Avalanche Problems

Loose Wet

20 cm of new snow that fell the night before last has settled and in some locations developed into another crust. Fresh sluffs will indicate that surface crusts have melted and the snow is ready to move. Small avalanches will build mass rapidly.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 3

Wind Slabs

Strong and gusty south winds yesterday produced a small avalanche cycle on steep N-NE aspects. Wind slabs and loaded pockets will have formed at and below ridge lines and near terrain features at ridge line

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Wet Slabs

The top meter of snow is moist except on sheltered north asp in the alpine. The snowpack is isothermal to 2100m on solar aspects with a series of crusts in the top 90 cm. Crusts provide potential failure planes and good bed surfaces for avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3