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Archived

Avalanche Forecast

Feb 7th, 2014–Feb 8th, 2014
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
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
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: Northwest Inland.

Confidence

Fair - Timing, track, or intensity of incoming weather system is uncertain on Monday

Weather Forecast

Saturday: A mix of sun and cloud. Moderate SE alpine wind. Freezing level in valley bottom with alpine high temperature reaching -20 C. Sunday: Cloudy with sunny periods. Moderate SE alpine wind. Freezing level in valley bottom with alpine high temperature reaching -20 C. Monday: Increasing cloud with light snow possible in the afternoon.

Avalanche Summary

Reports from Thursday include natural and artificially triggered cornice falls to Size 2.5 with only 1 Size 1 wind slab triggered on the slope below. The faceted surface snow is also sluffing readily in steep terrain with skier traffic.

Snowpack Summary

A highly variable snowpack surface includes surface facets, surface hoar, thin wind slabs, and scoured crust, or any combination thereof. Remember to take stock of current surface conditions, especially crusts, surface hoar, and facets. Once buried buy a cohesive slab, surface hoar or a thin layer of facets sitting on a crust almost always becomes a weak layer for avalanches, and will often persist.In sheltered areas, large surface hoar is growing on a few centimeters of faceted old storm snow sitting on the late January crust, which is likely faceted and laminated and could have surface hoar on top. The entire snowpack is likely faceting to some degree, especially where it is shallow. Basal facets and depth hoar are likely, but triggering is only a concern in thin and variable snowpack areas with large triggers. Cornices are also becoming brittle.

Avalanche Problems

Wind Slabs

Isolated fresh thin pockets of hard and soft wind slabs may be lurking below ridge crests and behind terrain features in exposed terrain.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>Be cautious as you transition into wind affected terrain.>Start on small terrain and slope-cut the top of slopes before riding them.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2