Avalanche Forecast

Issued: Nov 17th, 2011 4:00PM

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

a.l. horton, Parks Canada

Jasper.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

The weather pattern is stable on Friday

Problems

Wind Slabs

Soft to hard slabs up to 40cm thick can be found in gullies and lee terrain. The condition is less prevalent at Treeline.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Storm Slabs

The 8-10 cm of new snow that fell around the Icefield Area has not yet bonded to the snow below.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Persistent Slabs

It is possible to trigger an avalanche at this layer that would involve a full path release to ground. Whumphing was observed at treeline in the Icefield Area, failing on the weak basal facets buried by this layer.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

2 - 3

Valid until: Nov 18th, 2011 4:00PM