Avalanche Forecast
Dec 9th, 2011–Dec 10th, 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
1:
Low
The avalanche danger rating below treeline will be low
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
Regions: Little Yoho.
The chance of human triggering will continue to decrease with a long period of cool weather and little precipitation forecast through next week. Facetting and slow weakening will be the next long term trend for the snowpack. JBW
Avalanche Problems
Deep Persistent Slabs
The weak base of depth hoar and facets is bridged by hard wind slabs and less likely to be triggered, however, skier triggered and natural full depth avalanches are still a possibility.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Possible - Likely
Expected Size: 2 - 3
Wind Slabs
Hard wind slabs exist at treeline and above. These slabs can still be triggered on steep open slopes. 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