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Archived

Avalanche Forecast

Jan 21st, 2017–Jan 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
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

Regions: Little Yoho.

Watch for wind slabs or storm slabs on facets. This is still true for ice climbers at lower elevations.

Weather Forecast

Moderately cold temperatures, with sun and flurries are forecast for the area.

Snowpack Summary

30-50cm of storm snow sits over lower density facetted snow up to 1800. The storm snow sits over a generally well settled snowpack above this. Facet layers are still observed but are much less prevalent than out East. Storm slabs are extensive in the region and recent SW winds have formed wind slabs in alpine locations.

Avalanche Summary

The Yoho area was not observed today. Yesterday, numerous observations of storm slab failing on facets were observed below treeline.

Confidence

Avalanche Problems

Storm Slabs

40cm of new snow has settled into slabs with the warm and humid weather. These will be most reactive at lower elevations in steep (35+ degree) terrain where they sit over facets. Cooling temperatures over the next few days should slow activity.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Wind Slabs

Recent moderate to strong SW winds have redistributed storm snow creating wind slabs in alpine locations.

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

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2