Avalanche Forecast

Issued: Nov 29th, 2012 4:26PM

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

brian webster, Parks Canada

Banff Yoho Kootenay.

Summary

Weather Forecast

South westerly flow bringing only light snow showers to the area.

Snowpack Summary

Average snowpack depth at tree-line is 90-100cm. Snowpack stability tests show mod shears at storm snow interface down 30-40 cm, and mod to hard shears on the Nov 6th crust in the bottom third of the pack.

Avalanche Summary

No reported or observed avalanches today.

Confidence

Forecast snowfall amounts are uncertain on Friday

Problems

Wind Slabs

Expect thin wind slabs in the alpine from moderate SW winds.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Persistent Slabs

The Nov 6 raincrust is down 50-90 cm. Although we have not seen any recent activity on this crust, this is still a significant layer in the snowpack. Evaluate this layer carefully prior to entering steeper/bigger terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Valid until: Nov 30th, 2012 4:00PM