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Archived

Avalanche Forecast

Dec 31st, 2012–Jan 1st, 2013
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
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

Regions: Glacier.

With stable conditions, many large objectives are being skied. Remember that the snowpack is still young- below average snow depths mean crevasses are still thinly bridged. Stay well back from cornices when traveling along ridges.

Weather Forecast

A weak front passing through the region today will bring increasing cloud and light flurries today. A ridge of high pressure will build tomorrow bringing alpine sun with valley cloud, light to moderate N'ly winds and temps gradually warming to ~-5'C over the forecast period. Strong solar on Tuesday/Wednesday may trigger loose avalanches.

Snowpack Summary

New surface hoar is growing. 15cm of light snow buried a small surface hoar layer on Dec 25. This layer formed on unconsolidated snow between 1500-2000m. Tests on a W aspect at 2180m found planar results down 40cm on top of well settled snow. The Nov. crust is down 160cm and has yet to produce avalanches. Snowpack depths are below average.

Avalanche Summary

Skiers report sluffing of the top 20cm on steep slopes.  There were no new natural avalanches observed yesterday.

Confidence

Avalanche Problems

Loose Dry

The loose upper snow sluffs easily on steep slopes. So far, these have produced small (size 1) skier and naturally triggered loose avalanches. On large steep slopes, these may gain mass and become larger.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.On steep slopes, pull over periodically or cut into a new line to manage sluffing.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2