Archived

Avalanche Forecast

Nov 28th, 2012–Nov 29th, 2012

Alpine

2: Moderate

The avalanche danger rating in the alpine will be moderate

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

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

Avalanche 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