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Archived

Avalanche Forecast

Nov 27th, 2014–Nov 28th, 2014
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
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: Jasper.

In the midst of big storm. Critical loads have been reached.

Weather Forecast

Storm is continuing to bring up to 30cm more snow and moderate winds till at least Friday morning. Winds will switch from S to NE . A cold front will bring clear skies and cold temperatures lasting throughout the weekend.

Snowpack Summary

40 to 70cm of snow has fallen in the alpine and this will have drifted with the winds. This storm snow overlies a weak snowpack  consisting of rain crusts and facets. Suspected wind affect and soft slabs  at tree line and above.

Avalanche Summary

Loose avalanches to size 2 at all elevations. Soft slab avalanches suspected at and above tree line to 2.5

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Friday

Avalanche Problems

Storm Slabs

Soft slabs in wind loaded areas up to 40 cm in the alpine overlying a variety of weak layers. Critical loading has been reached and natural avalanche cycle in on the way.
Avoid all avalanche terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 3

Loose Dry

  Large sloughs can be expected in all steep terrain and gully features.
Avoid all avalanche terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 2