Avalanche Forecast

Issued: Nov 28th, 2012 4:00PM

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.

snow safety, Parks Canada

Banff Yoho Kootenay.

Summary

Weather Forecast

Low pressure moving in tonight bringing 4 days of unsettled weather.Â Expect 2-4 tonight, 10-15 along the divide tomorrow, 2-4 east.Â Mod SW wind. Could see some inversion as the warmer air to the west rides over the cooler air to the east.

Snowpack Summary

Surface hoar development 6-8 mm at treeline.Â Average snowpack depths at treeline are 90cm. 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

Intensity of incoming weather systems is uncertain

Problems

Wind Slabs

Avalanche activity on this layer has tapered, but there are likely a few pockets or features of concern in the alpine.

Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

2 - 3

Persistent Slabs

In the past week there have been avalanches on this layer as it's now down 50-90 cm depending where you are.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

2 - 3

Valid until: Nov 29th, 2012 4:00PM