Archived

Avalanche Forecast

Apr 3rd, 2012–Apr 4th, 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

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

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Warm temps are forecast for the afternoon, and if it arrives stability will deteriorate. Be cautious on solar aspects if the sun comes out.

Avalanche Problems

Wind Slabs

Wind slabs have formed on lee aspects where storm snow has been deposited and can be triggered remotely.

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. These layers will become more active with a rising freeze line and possible solar inputs.

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