Avalanche Forecast
Dec 7th, 2011–Dec 8th, 2011
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
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
2:
Moderate
The avalanche danger rating below treeline will be moderate
Regions: Banff Yoho Kootenay.
A temperature inversion is forecast for Thursday. Upper elevation temperatures may get close to zero degrees. Pay attention to alpine slopes that may be warming up.
Weather Forecast
Snowpack Summary
Avalanche Summary
Confidence
Avalanche Problems
Deep Persistent Slabs
The weak base of depth hoar and facets is now less sensitive to human triggering , however skier triggered and natural avalanches have recently been observed on this layer. A natural with a 400 m crown was observed on Mt Lefroy today.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 2 - 3
Wind Slabs
Strong winds have been moving snow from the west and north for the last few days and hard wind slabs have formed. It is likely that any slab will immediately step down to the weak base. Choose moderate slope angles & low consequence terrain
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 2 - 3