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Archived

Avalanche Forecast

Nov 16th, 2012–Nov 17th, 2012
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
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: Glacier.

The Winter Permit System is NOT yet in effect but is scheduled to come into effect on Friday November 23. Click here for information on how to obtain annual and daily winter permits.

Weather Forecast

Southwest flow will bring light flurries and moderate wind today. A low pressure system moves into the interior on Saturday with increased precipitation and rising freezing levels. 20 mm of precipitation is forecast through the weekend

Snowpack Summary

In sheltered treeline areas HS is about 80 to 110 cm. Approximately 45 cm of new and partially settled snow overlies melt-freeze crusts formed in early November. Stability tests show weaknesses down 15 cm in HST and down 55 cm between crust layers.

Avalanche Summary

No new natural avalanches were observed yesterday. Several size 1.5 skier triggered slab avalanches have been reported over the past two days in the Balu Pass and Bruins Pass area.

Confidence

Avalanche Problems

Wind Slabs

Soft windslabs up to 50 cm deep formed during periods of strong wind on Nov 13 in open exposed areas. These have proven to be sensitive to human triggering.
Avoid freshly wind loaded features.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3