Avalanche Forecast

Issued: Dec 19th, 2011 4:00PM

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

Brian Webster, Parks Canada

Banff Yoho Kootenay.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Problems

Wind Slabs

Strong westerly winds today redistributed yesterdays storm snow and formed fresh wind slabs in the alpine and treeline elevations.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 3

Deep Persistent Slabs

There is still concern about riders hitting the weak spot and triggering a full depth release on basal facets. A rider triggered a size 2.5 avalanche on this layer in the Lake Louise backcountry yesterday. See the facebook link below for pictures.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Valid until: Dec 20th, 2011 4:00PM