Avalanche Forecast
Dec 8th, 2011–Dec 9th, 2011
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
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
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.
The snowpack is starting to bridge the weak base of depth hoar over crust, but human triggering in steep terrain is still likely. Warming over the weekend may create an inversion with near zero temperatures in the alpine.JBW
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 yesterday.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 2 - 3
Wind Slabs
Wind effect in the alpine and at treeline has created a hard slab on most lee slopes. This slab can be triggered from the edges or thin spots and will likely immediately step down to the weak base of depth hoar.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 2 - 3