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Archived

Avalanche Forecast

Nov 27th, 2011–Nov 28th, 2011
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Banff Yoho Kootenay.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Avalanche Problems

Deep Persistent Slabs

Windslabs 60-100cm thick sit over weak basal depth hoar. Limited observations because of storm, but suspect natural avalanche cycle due to added load on this layer.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 2 - 4

Storm Slabs

Strong winds and moderate, warm precipitation has made for rapid formation of windslabs which has increased the danger. These windslabs are very susceptible to human triggering and will likely step down to the basal depth hoar.

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

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 2 - 3