Avalanche Forecast

Issued: Mar 5th, 2012 4:00PM

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

steve blake, Parks Canada

Jasper.

Highway 93 and Maligne Lake Road closed. Avalanche control Tuesday with expected re-opening Wednesday.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain

Problems

Storm Slabs

Heavy snow and moderate to strong SW winds is expected to continue through the evening. A widespread wind/storm slab condition is producing large natural avalanches, especially in the alpine. Avoid all avalanche terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Certain

Expected Size

2 - 4

Persistent Slabs

Open slopes on Northeast to South aspects have slabs that are sitting on surface hoar 20-60cm down. On southerly aspects, the surface hoar formed on a sun crust, increasing the possibility of remote triggering and wide propagations.

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

Elevations: Alpine, Treeline.

Likelihood

Very Likely

Expected Size

2 - 4

Valid until: Mar 6th, 2012 4:00PM