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Avalanche Forecast

Feb 15th, 2014–Feb 16th, 2014
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Northwest Inland.

Confidence

Fair - Due to the number of field observations

Weather Forecast

A series of frontal systems will be sending waves of light precipitation amounts accompanied by strong to extreme winds through the forecast period. Saturday night: Snow amounts 5-10 cm. Ridgetop winds blowing strong from the SE. Alpine temperatures near -4.0. Sunday: Mainly cloudy with some sunny periods and isolated flurries. Alpine temperatures near -7.0. Strong westerly ridgetop winds.Monday: Cloudy with some flurries. Alpine temperatures near -7.0. Ridgetop winds light from the SW.Tuesday: Snow amounts near 5 cm. Alpine temperatures near -10.0. Ridgetop winds blowing light from the SW.

Avalanche Summary

No new avalanche activity has been reported.

Snowpack Summary

The region has received between 20-45 cm of new snow which overlies a variety of old surfaces. These buried surfaces consist of facets, surface hoar (more predominant at treeline and below treeline elevations), a scoured crust, wind press, or any combination of these. Reports from the field indicate a very poor bond between the new snow and these old surfaces.Strong winds have likely added cohesion to the new storm slab, and have shifted the new snow into deeper wind slabs on lee slopes.The mid and lower snowpack are generally strong and well-settled. Basal facets and depth hoar are likely to exist in some parts of the region, but triggering has become unlikely.

Avalanche Problems

Storm Slabs

Up to 45 cm of new snow sits over a variety of potentially weak surfaces. There is an increased likelihood of triggering of a more cohesive slab in areas that have been wind affected.
Avoid freshly wind loaded features.>Choose conservative lines and watch for clues of instability.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 3