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Archived

Avalanche Forecast

Dec 7th, 2016–Dec 10th, 2016
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
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

Regions: Waterton Lakes.

Watch for early season hazards just below the snow surface, with ongoing cold temperatures even a minor injury could result in serious consequences.

Weather Forecast

The arctic ridge persists through Thursday, giving clear skies, calm winds and cold temps (Lows of -30, Highs of -25). On Friday a low pressure system moving inland from the coast will give flurries and snow showers through Saturday (total accumulations of 5-10 cm). Temperatures remain cold with overnight lows of -24 and daytime highs of -20.

Snowpack Summary

Up to 20cm of low density snow is covering a well settled early season snowpack (watch for buried windslabs near ridges). The snowpack above 2000m is over 100cm deep near in the divide, but much shallower at lower elevations and in Eastern areas. A mid November crust down 40-90cm was well bonded in areas observed to date but warrants evaluation.

Avalanche Summary

No recent activity observed.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Wind Slabs

Buried windslabs may still be triggerable. Expect fresh windslab development as winds increase Friday into Saturday.
Use caution in lee areas. Wind loading could create slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Loose Dry

Use caution above cliffs where small avalanches may have severe consequences.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1