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Archived

Avalanche Forecast

Dec 2nd, 2018–Dec 3rd, 2018
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
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.

Good skiing can be found at alpine and tree-line elevations, but many early season hazards are still exposed below tree-line. Carry a headlamp and get back to your vehicle early; these are the dark days of December.

Weather Forecast

A cold air mass moving down from the north will bring cooler temperatures and dry conditions for the next 4-5 days. For today, expect a mix of sun and cloud, no precipitation, an alpine temperature of -10, light winds and freezing levels at 800m. The high pressure system will be fully established by early next week.

Snowpack Summary

40cm of snow covers a surface hoar or suncrust layer at TL & sheltered ALP locations. Winds have created a soft slab on this layer in specific lee or cross-loaded features. The October 26th crust near ground may be poorly bonded on some high elevation north aspects.

Avalanche Summary

Loose and thin slab avalanches (15-20cm thick) to size 2 were observed from steep south aspects yesterday, while loose dry point releases to size 1.5 were seen coming from steep N aspects. Snow stability tests show resistant planar results in the upper snowpack, indicating that human triggering is possible.

Confidence

Avalanche Problems

Persistent Slabs

This layer is widespread and most pronounced at treeline elevation. It will be most reactive in areas where wind loading has occurred and encouraged slab development.
Watch for shooting cracks or stiffer feeling snow. Avoid areas that appear wind loaded.Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2