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Archived

Avalanche Forecast

Jan 7th, 2017–Jan 8th, 2017
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
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

Regions: Jasper.

Weather Forecast

Cold and clear on Sunday.  Snow beginning late Sunday night and through Monday with 15 cm possible.  Winds are expected to be light during the storm then blow moderate from the NW on Tuesday as they bring back the cold dry air.  Cold, clear and dry through the rest of the week.

Snowpack Summary

The snowpack is shallow, faceted and weak. The Nov. crust can still be found about 30 cm from ground but is faceting into large depth hoar. The upper half of the snowpack has layers of wind slabs.

Avalanche Summary

Small loose dry avalanches were reported in the Maligne Lake area on Friday out of steep rock slab alpine features.  No avalanche patrol on Saturday.

Confidence

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

Avalanche Problems

Loose Dry

Faceting the surface snow causing it to lose cohesion and release loose dry avalanches in steep alpine rocky terrain. Particularly concerning for ice-climbers in confined terrain.
Use caution above cliffs where small avalanches may have severe consequences.Be very cautious with gully features.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Wind Slabs

Cold temperatures and hard slab conditions make triggering less likely. Triggering from shallow spots remains a possibility.
Caution in lee and cross-loaded terrain near ridge crests.Watch for areas of hard wind slab in steep alpine features.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3