Avalanche Forecast

Issued: Dec 6th, 2011 4:00PM

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

Brad White, Parks Canada

Banff Yoho Kootenay.

Human Triggering of large avalanches in complex terrain remains likely. See the facebook link below for photos or visit: http://www.facebook.com/ParksMountainSafety?sk=photos

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Problems

Deep Persistent Slabs

The weak base of depth hoar and facets is now less sensitive to human triggering , but with stiffer slab properties, the propagation potential will make for bigger full depth/full feature avalanches and increase the possibility of remote triggering.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

2 - 3

Wind Slabs

Strong winds have been moving snow from the west and north for the last few days and hard wind slabs have formed. It is likely that any slab will immediately step down to the weak base. Choose moderate slope angles & low consequence terrain