Avalanche Forecast

Issued: Mar 28th, 2012 8:21AM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is considerable. Known problems include Loose Wet, Deep Persistent Slabs and Cornices.

ali haeri, Parks Canada

Glacier.

Mild temperatures are keeping the lower elevations unstable. Glide cracks are a concern where present, they have been releasing large avalanches and may catch you by surprise.

Summary

Problems

Loose Wet

Warm overnight temperatures over the last 3 nights prevented the snowpack from refreezing at lower elevations. Yesterdays solar radiation produced numerous avalanches and the same rapid deterioration can be expected today if the sun shines.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

The February weak layer is buried down 1.5 to 2 m. This layer has been reacting infrequently to skier triggering particularly at treeline elevations. Consequences are high if this layer does fail.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely

Expected Size

1 - 3

Cornices

Be aware of the overhead cornice hazard on your approach. The sun at this time of year is quite strong when it comes out and may be enough to release cornices. They are large triggers and could produce avalanches on the deeper instabilities.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Mar 29th, 2012 8:00AM