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Archived

Avalanche Forecast

Nov 30th, 2013–Dec 1st, 2013
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
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
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.

Precipitation with strong winds event happening on the North Coast. If you have avalanche data or information please send it to[email protected]

Confidence

Fair - Freezing levels are uncertain

Weather Forecast

Cold arctic air will move into the region with the passing of the Pacific frontal systems. The arctic air is forecast to stay in the region for the remainder of the week. Winds will change from southwest to north then northeast by Tuesday.

Avalanche Summary

No avalanches reported yet, however, expect activity on wind slabs that develop during the storm. The added load of new snow and wind transported snow may overload weak layers.

Snowpack Summary

Destructive wind slabs exist at tree line and above on east and northeast lee slopes. Rain at lower elevations has saturated the lower snowpack and will stabilize when the arctic air arrives. Deeply buried October crust may become reactive with the weight of the new snow. Little is known about the extent of this layer with regards to the aspect and elevations where it can be found.

Avalanche Problems

Wind Slabs

Use caution on wind loaded lee slopes. New snow load may trigger buried weak layers. The possibility of avalanches is increasing.
The new snow will require several days to settle and stabilize.>Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3