Avalanche Forecast

Issued: Dec 4th, 2011 4:00PM

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

garth lemke, Parks Canada

Jasper.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

The weather pattern is stable on Monday

Problems

Deep Persistent Slabs

Avalanche control produced several large ground releases on Friday. Recent winds have overloaded this layer. There remains potential for skier triggering on alpine slopes. Triggering this layer would result in large avalanche.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

2 - 3

Wind Slabs

This layer is becoming less of a concern as it settles in yet steep cross loaded or lee slopes are likely slab trigger zones. In the alpine the snowpack depth is highly variable. At tree line travel is good and the snowpack supportive.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Dec 5th, 2011 4:00PM