Avalanche Forecast

Issued: Apr 24th, 2012 8:00AM

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

danyelle magnan, Parks Canada

Glacier.

The spring snowpack continues to weaken. Small inputs; an brief period of sun hitting a slope or an intense rain shower; are triggering large avalanches from all aspects running into fans. This will continue today, with sun and showers forecast.

Summary

Problems

Loose Wet

Temperatures have remained above freezing in the alpine for the last 72hours, preventing an overnight freeze. The upper snowpack is isothermal and moist on solar aspects with little strength.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 3

Wet Slabs

Moist snow and several crusts exist in the upper snowpack. Avalanche control Saturday produced size 2-3 wet slab avalanches, propagating on a crust down 40. Glide cracks continue to fail producing large avalanches running to valley bottom.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

2 - 3

Valid until: Apr 25th, 2012 8:00AM