Archived

Avalanche Forecast

Apr 2nd, 2012–Apr 3rd, 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

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

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

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Glacier.

On the weekend slab avalanches were triggered remotely from long distances away in the alpine. Skiers also triggered avalanches near ridge crests. So be cautious and look for wind slabs.

Avalanche Problems

Wind Slabs

Wind slabs have formed on lee aspects where storm snow has been deposited

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

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 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