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Archived

Avalanche Forecast

Apr 8th, 2017–Apr 9th, 2017
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
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Northwest Coastal.

Cornices remain the primary concern. Solar radiation is a common cornice trigger. Limit your exposure when it's cloudy and completely avoid cornices when it's sunny.

Confidence

High -

Weather Forecast

SUNDAY: Mix of sun and cloud isolated flurries. Light southerly ridgetop winds. Freezing level around 1400 m.MONDAY: Mix of sun and cloud. Light southeasterly ridgetop winds. Freezing level around 1500 m.TUESDAY: Mix of sun and cloud. Light southeasterly ridgetop winds. Freezing level around 1500 m.

Avalanche Summary

No new avalanches were reported on Friday in this region.

Snowpack Summary

10-15 cm of new snow on Saturday with light to moderate southerly winds may have created small wind slabs on lee features below ridgetops. The new snow will likely be sitting on hard surfaces created by strong winds earlier in the week. A weak layer of facets and crusts are buried 100-150 cm down. The layer has been unreactive recently, but rapid warming of the snowpack or a large trigger, such as a cornice, may still have the potential to trigger it.

Avalanche Problems

Cornices

Large cornices may become weak with daytime warming and have potential to trigger slabs on the slopes below.
Give cornices a wide berth when traveling on ridges.Avoid steep slopes below cornices.Even small cornice falls may trigger larger avalanches.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 3

Wind Slabs

New snow and moderate southerly winds may have formed thin wind slabs in lee features below ridgetops on Saturday.
Avoid freshly wind loaded features.Use ridges or ribs to avoid pockets of wind loaded snow.Approach steep lee and cross-loaded slopes with caution.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2