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Archived

Avalanche Forecast

Dec 27th, 2012–Dec 30th, 2012
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Waterton Lakes.

Winds are increasing with lots of new snow available for wind transport.  The hazard will slowly increase over the next several days.  Stumps and rocks are still lurking near the surface at lower elevations.  Great skiing in sheltered locations!

Weather Forecast

More seasonal temperatures are forecast for the next several days.  Winds will increase from Moderate to Strong out of the NW at higher elevations.  Snow amounts remain light with a small system forecast for Saturday night and a clearing trend following this.

Snowpack Summary

Wind slabs and cross loading at tree line and in the alpine is beginning to develop with increasing W winds and lots of recent snow available for wind transport.  In thick snowpack areas there are no other major concerns.  In thin snow pack areas new snow or wind slabs may be hiding a weak facetted base.  Caution should be used in these locations.

Avalanche Summary

No new avalanches have been observed in the past several days however we expect to see some cornice failures and wind triggered avalanches over the next few days as the winds increase.

Confidence

Wind effect is extremely variable

Avalanche Problems

Wind Slabs

Wind slabs forming with increasing NW winds and lots of recent storm snow available for transport.  The hazard will slowly increase over the next several days.
Avoid freshly wind loaded features.Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2