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Archived

Avalanche Forecast

Feb 12th, 2013–Feb 13th, 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
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: Kananaskis.

Up to 5cm of new snow overnight with winds spiking at 125km/h out of the West. Watch for fresh wind slabs in lee and cross-loaded features, and be aware of the potential for higher danger levels if more snow arrives than is forecasted.

Confidence

Fair - Forecast snowfall amounts are uncertain

Weather Forecast

Winds will spike at 125km/h out of the west overnight. As much as 5cm of snow is expected by Wednesday morning with temperatures cooling to -15 degrees.

Avalanche Summary

Nothing new.

Snowpack Summary

Trace amount of snow overnight. 0 to 20cm of relatively low density snow sits on a very hard wind slab. A hard compression test was observed which failed beneath the dense wind slab. Snowpack at lower elevations is weak and facetted.

Avalanche Problems

Wind Slabs

Between 0 and 20cm of recent snow currently overlies a hard wind slab in alpine and treeline areas. Shallow snowpack areas and steep convex features are potential triggering spots for this buried wind slab.
Avoid convexities or areas with a thin or variable snowpack.>Avoid freshly wind loaded features.>

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 4

Loose Dry

Sluffing from steep terrain could occur on Wednesday if the forecasted winds and snow arrive. Be cautious in and below steep lee and cross-loaded terrain, especially below ridge-crests.
Avoid travelling on ledges and cliffs where sluffing may have severe consequences.>Be cautious of sluffing in steep terrain.>

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 3