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Archived

Avalanche Forecast

Feb 20th, 2013–Feb 21st, 2013
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Kananaskis.

Winds were calm again on Wednesday but that will soon change as the next system begins to approach the forecast region.  Light snow and moderate westerly winds forecast for Thursday.

Confidence

Good

Weather Forecast

Light snow is forecast to fall throughout the day on Thursday as the next system begins to approach the forecast region.  Winds will begin to increase into the moderate range out of the west so we may see some additional snow transport at higher elevations. Temperatures will still be cold at -15C.

Avalanche Summary

A few small loose dry avalanches up to sz 1 out of steep unskiable terrain on northern aspects.

Snowpack Summary

Another day with limited winds.  A moderate sheer persists at the storm snow interface down 20-30cm throughout the region and a second sheer persists down 60cm beneath a previous windslab.  There was some moist snow on solar aspects later in the day on Wednesday.

Avalanche Problems

Loose Dry

A few loose dry avalanches up to size 1 from steep unskiable terrain on northern aspects 
Be cautious of sluffing in steep terrain.>

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 4

Wind Slabs

Pockets of soft slab are present in lee and cross-loaded features in the alpine. In many areas these new slabs sit on an old smooth layer of hard slab, and may be more likely to trigger where this condition exists.
Assess start zones carefully and use safe travel techniques.>Avoid lee and cross-loaded terrain near ridge crests.>

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 4