Avalanche Forecast

Issued: Jan 23rd, 2012 4:00PM

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

a.l. horton, Parks Canada

Jasper.

Up to 20 cm of snow with SW winds will build wind slab on Tuesday.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

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

Problems

Wind Slabs

Moderate SW winds continue to develop wind slabs on open lee slopes and terrain features. We are unsure of the bond between these new slabs and the snow below. Moderate to strong SW winds and up to 20 cm of snow is expected on Tuesday.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Deep Persistent Slabs

All though few and far between, large avalanches continue to be observed by large loads (large cornice fall) on this layer. Corniced steep slopes on rocky terrain should be avoided.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Jan 24th, 2012 4:00PM