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Archived

Avalanche Forecast

Dec 3rd, 2011–Dec 4th, 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
3: Considerable
The avalanche danger rating below treeline will be considerable
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

Regions: Northwest Coastal.

Confidence

Poor - Freezing levels are uncertain on Monday

Weather Forecast

Freezing levels are forecast to rise on Sunday afternoon and may reach 3000 metres by Monday. Cooler temperatures should follow by Tuesday. There is a chance of some flurries overnight Monday into Tuesday morning.

Avalanche Summary

Large natural avalanches up to size 3.0 have been reported from the Bear Pass and the coastal mountains near Terrace. There are no reports of human triggered avalanches.

Snowpack Summary

Very strong SW-NW winds may wreak havoc on the snowpack creating scoured areas and soft or hard wind slabs in exposed lee terrain and cross-loaded gullies or terrain features. Coastal areas are reporting a very deep and strong snowpack which is at or near record levels for this time of year. A buried surface hoar layer may be found down 100-150cm near Terrace, but there is no recent information on the presence and sensitivity of this layer.

Avalanche Problems

Wind Slabs

Hard and soft wind slabs are likely in exposed terrain on a variety of aspects well into treeline.

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

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 2 - 5

Storm Slabs

Storm snow instabilities may be triggered by a skier or snowmobile, or by additional loading from snow or wind.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 2 - 5