Avalanche Forecast

Issued: Dec 11th, 2011 4:00PM

The alpine rating is considerable, 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.

The snowpack is stabilizing however now is not the time to be venturing onto or under big steep slopes.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number of field observations

Problems

Wind Slabs

There is a veneer of wind slab on lee slopes ranging from soft slab to hard slab and sastrugi. Human triggering is possible which may then step down to the basal facet layer resulting in a large full path avalanche.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Deep Persistent Slabs

The slabs above the basal facets can be triggered where the snowpack is shallow and along the edges of deeper slopes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 3

Valid until: Dec 12th, 2011 4:00PM