Avalanche Forecast

Issued: Feb 11th, 2012 4:00PM

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

snow safety, Parks Canada

Banff Yoho Kootenay.

Monday afternoon a small system will deposit up to 10 cm of snow in the alpine. The danger will rise to moderate. Redistribution of the new will create windslabs in lee areas. This will cover up the once conspicuous surface hoar, take note.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Monday

Problems

Wind Slabs

Isolated wind slabs up to 100cm thick in the high alpine are still triggerable in steep terrain. Thinner snowpack areas on gully sidewalls and unsupported slopes will be most vulnerable.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

2 - 3

Cornices

Strong winds from earlier in the month have created large cornices on lee (mostly easterly) aspects. Several large cornice collapses have been observed over the past week. These cornices could be a big enough to trigger a deep slab.

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

Elevations: Alpine.

Likelihood

Possible - Likely

Expected Size

2 - 3

Valid until: Feb 12th, 2012 4:00PM