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Archived

Avalanche Forecast

Dec 11th, 2016–Dec 12th, 2016
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
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.

Watch for variable wind slab in exposed terrain at and above treeline.  Use caution in steeper wind loaded terrain.

Weather Forecast

Alpine temperatures should reach a balmy -14C today accompanied by light to moderate westerly winds.  A dusting of new snow is expected today before cooler temperatures and clearing sky invades to start the work week.

Snowpack Summary

Cold temperatures are promoting faceting in surface layers slowly softening the widespread hard slabs found in exposed terrain. The recent light precipitation will also aid in this regard. The mid-pack is well settled and sits on a developing facet layer above the Nov 13 crust. Test results on this layer range from resistant planar to no result.

Avalanche Summary

Limited natural activity in the highway corridor with 3 size 2 slabs observed. No new avalanches reported in the backcountry yesterday.

Confidence

Wind speed and direction is uncertain

Avalanche Problems

Wind Slabs

Widespread wind slabs formed last week during the transition to arctic air.  The bond of these slabs continues to improve with field tests giving resistant results.  Steeper cross loaded and unsupported terrain features should be avoided. 
Dig down to find and test weak layers before committing to a line.Use caution in lee areas. Recent wind loading have created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3