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Archived

Avalanche Forecast

Jan 30th, 2012–Jan 31st, 2012
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
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
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

Regions: Banff Yoho Kootenay.

We will be conducting avalanche control on Mt. Bourgeau (Banff) and Mt. Whymper (Kootenay) on Tuesday, January 31st. Please, no outdoor activities in these areas tomorrow.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Avalanche Problems

Wind Slabs

Recent winds and snow have created windslabs up to a meter thick on lee slopes on N- E aspects. These sit on previous windslabs and facetted snow, and are especially touchy in wind effected areas in the alpine.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 3

Storm Slabs

10-40 cm of snow has fallen in the last 48h, with the most snow West of the divide. This snow came in warm and is bonding well, but is more reactive in wind effected areas in the alpine and thin areas such as open glades below tree line in Kootenay

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Persistent Slabs

The basal facets are more of a concern in thinner snowpack areas east of the divide, and in Kootenay park. Confidence in bigger alpine terrain is still low because of the high winds that have scoured the alpine this year, creating many thin spots.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely

Expected Size: 2 - 4