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Archived

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: South Coast.

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

Confidence

Moderate - Due to the number of field observations

Weather Forecast

A series of powerful storms are going to wallop the coast over the coming days bringing heavy precipitation and strong winds that should spill over into the inland regions. Unfortunately the freezing level could rise as high as 2200m on Tuesday. However, higher elevations could see snowfall accumulations of up to 40cm. Freezing levels are forecast to fall back to 1500m for the remained of the forecast period with another 40cm expected by Friday. Winds will be moderate from the SW.

Avalanche Summary

A widespread avalanche cycle is expected to continue as a series of storms pummels the coast range over the next couple of days.

Snowpack Summary

We're still dealing with a limited set of observations and it sounds like there is quite a lot of variability across the region. It's been snowing hard above 1500m forming deep storm slabs at tree-line and in the alpine. The new snow is sitting on a supportive mid-pack in the Duffy whereas pre-storm reports from the Coquihalla described a shallower early season snowpack.

Avalanche Problems

Storm Slabs

Heavy snowfall will result in a widespread avalanche cycle.
Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.>It is a good time to stay within the boundaries of a ski resort.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 2 - 5