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Archived

Avalanche Forecast

Dec 10th, 2012–Dec 13th, 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
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.

There is good skiing above 1900m in sheltered locations!  Below 1900m travel off of the summer trails is still difficult due to shallow snowpack depths.

Weather Forecast

A continued Westerly flow will persist over the next few days with only light amounts of snow forecast and seasonal temperatures.  Light to Moderate SW to W winds will be present in the alpine.

Snowpack Summary

5cm snow overnight sits on wind slabs formed from strong NW winds Sunday.  Below this a well settled snowpack with no significant shears was found today near Summit Lake.  Snowpack depth at 2000m averages 150cm but there is significant variability in depth due to previously wind transported snow. Snowpack depth tapers off significantly below 1900m.

Avalanche Summary

No new avalanches observed today.   There is certainly potential for skier triggered wind slab avalanches at treeline and in the alpine.  Watch for steep wind loaded terrain or thin areas which may be weaker than the surrounding snowpack.

Confidence

Wind effect is extremely variable

Avalanche Problems

Wind Slabs

There is certainly potential for skier triggered wind slab avalanches at treeline and in the alpine.  Watch for steep wind loaded terrain or thin areas which may be weaker than the surrounding snowpack.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2