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Avalanche Forecast

Dec 7th, 2015–Dec 8th, 2015
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Sea To Sky.

Rising freezing levels, heavy precipitation, and strong winds are a recipe for High avalanche danger!

Confidence

High

Weather Forecast

A series of powerful storms are going to wallop the coast over the coming days bringing heavy precipitation and strong winds. Unfortunately the freezing level could rise as high as 2000m on Tuesday. However, higher elevations could see snowfall accumulations of between 40 and 60cm. Freezing levels are forecast to fall back to between 1000 and 1500m for the remained of the forecast period with another 55cm expected by Friday. Winds will be moderate from the southwest.

Avalanche Summary

There have been reports of a widespread natural avalanche activity from the Whistler area that is likely indicative of what is going on in the rest of the Sea to Sky region. This cycle is expected to continue as a series of storms pummels the coast range over the next couple of days.

Snowpack Summary

It's been snowing hard above 1500m where deep storm slabs are developing. In addition, extreme southwesterly winds have produced even deeper winds slabs that I expect extend well into lee features both in the alpine and at tree-line. Below tree-line snow depths are still below threshold for avalanches.

Avalanche Problems

Storm Slabs

Heavy snowfall will likely result in a continued and widespread avalanche cycle.
Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 2 - 5