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Archived

Avalanche Forecast

Dec 7th, 2012–Dec 8th, 2012
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Kananaskis.

The good start to the season continues with continuing snow storms leaving up to 10cms. Forecasters are all in agreement that the alpine and large treeline features should be treated with respect for the next while. Expect rapid changes with wind. MM

Confidence

Fair - Timing of incoming weather is uncertain on Sunday

Weather Forecast

Avalanche Summary

Nc, sz2.5, Loose snow, 2800m, NE aspect, 80m X 600m,

Snowpack Summary

10 unsettled HN overlies an overall settled midpack, however there are 4F winslabs present at TL and ALP in specific terrain. Nov06 crust now down 70-80 at TL.

Avalanche Problems

Storm Slabs

Strong to extreme winds have created widespread storm slabs in alpine areas and isolated wind slabs at treeline. Recent storm snow totals are close to 50cm so lots of snow is available for transport. These slabs may be buried by the new snow.
Avoid cross loaded features.>Be cautious as you transition into wind affected terrain.>

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

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 4

Loose Dry

Loose dry avalanches from steep unskiable terrain on all aspects, but more prominent on lee aspects.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3

Persistent Slabs

The Nov rain crust persists about 30+cm off the ground throughout the forecast area and is reactive to stability tests in the hard range. Avalanches in the upper snowpack may step down to this weakness.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 3 - 6