Avalanche Forecast

Issued: Apr 21st, 2012 8:08AM

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

Parks Canada Robert Hemming, Parks Canada

Summary

Problems

Loose Wet

An icon showing Loose Wet
20 cm of new snow that fell the night before last has settled and in some locations developed into another crust. Fresh sluffs will indicate that surface crusts have melted and the snow is ready to move. Small avalanches will build mass rapidly.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 3

Wind Slabs

An icon showing Wind Slabs
Strong and gusty south winds yesterday produced a small avalanche cycle on steep N-NE aspects. Wind slabs and loaded pockets will have formed at and below ridge lines and near terrain features at ridge line

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Wet Slabs

An icon showing Wet Slabs
The top meter of snow is moist except on sheltered north asp in the alpine. The snowpack is isothermal to 2100m on solar aspects with a series of crusts in the top 90 cm. Crusts provide potential failure planes and good bed surfaces for avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Valid until: Apr 22nd, 2012 8:00AM