Archived

Avalanche Forecast

Apr 1st, 2012–Apr 2nd, 2012

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

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

Regions: Glacier.

Avalanches have been triggered by very experienced people near ridge crests, and remotely from up to 300m away! These avalanches may step down 2m to the Feb 9th surface hoar layer!

Avalanche Problems

Wind Slabs

Wind slabs have formed on lee aspects where storm snow has been deposited. These slabs have been remote triggered from as far away as 300m!

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 4

Storm Slabs

20-30cm of storm snow is forming a soft slab which is sitting on a sun crust on solar aspects and a melt freeze crust and moist snow below treeline.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 3

Deep Persistent Slabs

The February weak layer is buried down 1.5 to 2 m. This layer may be triggered by a heavy load such as a cornice failure or an avalanche in the upper snowpack. Consequences are high if this layer does fail.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 3 - 4