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Archived

Avalanche Forecast

Dec 4th, 2015–Dec 5th, 2015
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
4: High
The avalanche danger rating in the alpine will be high
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
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

Regions: South Coast.

There is a great deal of variability in the region. Avalanche Danger is increasing as a series of storms approaches from the southwest.

Confidence

Low - Due to the number and quality of field observations

Weather Forecast

Light snow Friday night resulting in 3-5 cm by Saturday morning combined with moderate southwest winds. 5-10 cm during the day Saturday with strong southerly winds and freezing levels around 1200 metres. 10-20 cm on Sunday with rising freezing levels and strong southwest winds. Storm continuing on Monday.

Avalanche Summary

No new avalanches reported.

Snowpack Summary

There is a great deal of variability in the region. The Duffey Lake area has received the most snow and rain during the recent storms, and it has also had the highest freezing levels. The Coquihalla has a shallower snowpack with slightly cooler temperatures. Storm slabs of varying depths are developing above a mixture of old surfaces left behind after the recent high pressure. We have not had many observations from this region, if you are out in the mountains please submit your observations to the Mountain Information Network.

Avalanche Problems

Storm Slabs

Storm slabs continue to develop with each new pulse of Pacific moisture. Incremental loading like this can add a great amount of uncertainty for forecasting avalanche danger.
Use ridges or ribs to avoid pockets of wind loaded snow.>Be alert to conditions that change with elevation.>Choose conservative lines and watch for clues of instability.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 4