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Archived

Avalanche Forecast

Dec 21st, 2017–Dec 22nd, 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
1: Low
The avalanche danger rating in the alpine will be low
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: Little Yoho.

Ice climbers in Field pay attention as there is potential for loose dry avalanches out of steep terrain running a long ways.

Weather Forecast

The Arctic High moves in on Friday bring sunny and cold weather through Saturday. Winds will be light to moderate from the north.

Snowpack Summary

The most significant layer in the snowpack is the Dec15 layer which is buried by 25-40cm of low density storm snow. This weak layer consists of of surface hoar (at tree-line and below), sun crust or facets (depending on location). Mod shears have been observed on this interface. Thin wind-slabs have been reported in isolated areas in the alpine.

Avalanche Summary

No natural avalanches observed or reported in past 24 hours. Potential for loose dry avalanches exist out of steep terrain

Confidence

Avalanche Problems

Wind Slabs

Isolated wind slabs are present in the alpine, however there is lots of snow available for transport. Pay attention to local winds as conditions can change quickly if the winds pick up.
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Dry

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2