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Archived

Avalanche Forecast

Dec 5th, 2011–Dec 6th, 2011
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: South Coast.

Confidence

Fair - Due to limited field observationsfor the entire period

Weather Forecast

Tuesday: Increasing clouds throughout the day, but no precipitation is expected until the evening. The freezing levels should drop to around 1900m as the temperature inversion weakens. Alpine winds are expected to remain light. Wednesday: Light flurries possible in the morning, then clearing throughout the day. Light northerly winds with freezing levels around 1200m. Clear, light wind , and freezing levels around 1900m.

Avalanche Summary

Warm temperatures and sun-exposure has resulted in small wet loose avalanches in steep south aspects.

Snowpack Summary

New surface hoar is growing, surface snow is faceting, and wet surface snow on south facing slopes is freezing into a crust overnight. In wind-exposed areas, expect to find a variable mix of hard wind slab, scoured areas, and sastrugi. The prominent feature in the upper snowpack is a thick rain crust from last weekend, which extends well into treeline elevations. The mid and lower snowpack is generally well settled and strong. Basal depth hoar probably lurks in thin snowpack areas.

Avalanche Problems

Wind Slabs

Wind slabs may be lurking below ridge crests, behind terrain features, and in cross-loaded gullies.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3