Avalanche Forecast

Issued: Apr 21st, 2012 4:00PM

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.

A rising freezing level up to 3000 meters is expected for the South Rockies. Should this system enter the Jasper forecast area, watch for cornice failures in the alpine as well as loose wet avalanches below treeline.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Problems

Loose Wet

Warm temperatures and additional load from snow or perhaps rain at lower elevations will make avalanches go to ground.

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

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Wind Slabs

Additional snow on Sunday and rising freezing levels into the high alpine may produce avalanches from this layer.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Deep Persistent Slabs

Warm temperatures and large loads such as from cornice failures may produce avalanches that step down into the weak layers deep in the snowpack.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Apr 22nd, 2012 4:00PM