Avalanche Forecast

Issued: Dec 27th, 2011 4:12PM

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

a.l. horton, Parks Canada

Jasper.

Up to 30 cm of snow is expected to fall until the end of the day on Wednesday. Moderate SW winds will accompany this snow making for dangerous slab avalanche conditions on lee slopes at tree line and above.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

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

Problems

Wind Slabs

Heavy snow and moderate southwest winds will continue to build soft slab conditions on lee slopes and stripe fetch areas.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Deep Persistent Slabs

The heavy snow forecast along with moderate SW winds may overload this weak layer which could result in full snowpack avalanches.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Valid until: Dec 28th, 2011 4:00PM