Archived

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: Banff Yoho Kootenay.

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

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

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