Avalanche Forecast

Issued: Apr 3rd, 2012 8:02AM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is considerable. Known problems include Wind Slabs, Storm Slabs and Deep Persistent Slabs.

Parks Canada jon schleiss, Parks Canada

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

Summary

Problems

Wind Slabs

An icon showing 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

An icon showing 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

An icon showing 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

Valid until: Apr 4th, 2012 8:00AM