Avalanche Forecast

Issued: Apr 22nd, 2012 5:39PM

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

mike eder, Parks Canada

Jasper.

The avalanche danger in the morning will be determined if there was a freeze and how strong the crust developed. Temperatures are expected to stay warm so evaluate your trip based on the crust and start early.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain

Problems

Loose Wet

If freezing levels remain at mountain top elevations, expect to see avalanches where rainfall has soaked into the upper layers of the snowpack.

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

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Wind Slabs

Sunday's rain soaked into the recent storm snow adding more load to windslabs. This may contribute to natural and skier initiated avalanches at all elevations.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Deep Persistent Slabs

Warm temperatures and rain may contribute to cornice fall which could overload these weak layers contributing to full depth avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Apr 23rd, 2012 4:00PM