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Archived

Avalanche Forecast

Apr 6th, 2012–Apr 7th, 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
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.

Afternoon cloud & light NE winds will likely keep slopes cool again tomorrow. Expect a strong freeze tonight. Still a winter snowpack with active deep weaknesses. Be mindful of prolonged sun affect increasing the avalanche hazard. LP

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Avalanche Problems

Loose Wet

The recent storm snow (up to 35 cm in Kootenay) is sitting on several sun-crusts, which can provide a good sliding interface. Daytime heating & solar affect can increase the hazard on slopes overhead or on steeper terrain where buried crusts exist.

Aspects: North, North East, East.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Wind Slabs

Fresh wind slabs have been found in the alpine. Be extra careful in the immediate lees of alpine ridges, and on steep convex rolls.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Deep Persistent Slabs

Both the basal facet layer and the Feb 12 surface hoar are still surprising us a with isolated large avalanches, some being triggered by skiers. The terrain of most concern are weak, shallow and rocky snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3