Avalanche Forecast

Issued: Nov 27th, 2011 4:00PM

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

Snow Safety, Parks Canada

Banff Yoho Kootenay.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Problems

Deep Persistent Slabs

Windslabs 60-100cm thick sit over weak basal depth hoar. Limited observations because of storm, but suspect natural avalanche cycle due to added load on this layer.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Very Likely

Expected Size

2 - 4

Storm Slabs

Strong winds and moderate, warm precipitation has made for rapid formation of windslabs which has increased the danger. These windslabs are very susceptible to human triggering and will likely step down to the basal depth hoar.

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

Elevations: Alpine, Treeline.

Likelihood

Very Likely

Expected Size

2 - 3

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