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Archived

Avalanche Forecast

Dec 13th, 2016–Dec 14th, 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
1: Low
The avalanche danger rating in the alpine will be low
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

Regions: Glacier.

Pack plenty of extra clothing, warm fluids, and a headlamp for these cold, short days.

Weather Forecast

Sunny with cloudy periods, alpine highs of -17*C, and light NW winds. More of the same for the remainder of the week with no signs of snow for Rogers Pass until late in the weekend...bundle up and enjoy the sunshine!

Snowpack Summary

Light snow over the weekend has hidden widespread hard wind slabs formed during the cold Arctic outbreak. The new snow has also formed thin surface slabs in the immediate lee of ridges and alpine features. Recent snowpack tests indicate both of these slabs are stubborn to initiate and move slowly if propagated.

Avalanche Summary

No new avalanche activity observed in the highway corridor in the last 48hrs.

Confidence

Avalanche Problems

Wind Slabs

Thin, stubborn windslabs on the surface hide the hard windslabs formed by the cold Arctic air moving in. The hard slabs are prevalent near ridge tops or further downslope in valleys that acted as a wind funnel for the cold air flow.
The recent snow may now be hiding windslabs that were easily visible before the snow fell.Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3