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Archived

Avalanche Forecast

Dec 30th, 2023–Dec 31st, 2023
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
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

Recent storm snow at upper elevations will take some time to settle and bond as the temperature gradually cools through the day Saturday.

Confidence

Moderate

Avalanche Summary

On Friday there were numerous reports of a naturally triggered size 2-3 wind and storm slabs in alpine terrain on northwest through northeast aspects. There were also numerous reports of low elevation wet loose and wet slab avalanches both naturally and explosives triggered size 1-2.

There were also several reports of glide slabs releasing naturally size 1-2.

Snowpack Summary

Below 1400 m the snow surface has either frozen into crust or is wet.

Recent snowfall amounts across the region range from 30 - 50 cm at upper elevations. This snow has been redistributed by southeast through southwest wind likely forming thick wind slabs in lee terrain.

A layer of facets buried at the end of November can be found near the ground.

The snowpack depth varies between 200 and 300 cm at treeline.

Weather Summary

Saturday Night

Cloudy with light rain or snow, accumulation 2-4 cm above 1100 m, southeast wind 20 - 40 km/h, treeline temperature -1 °C, freezing level 900 m.

Sunday

Mostly cloudy, south west wind 15-25 km/h, treeline temperature -6 °C, freezing level dropping to valley bottom.

Monday

Mainly cloudy, southeast wind 10-20 km/h, treeline temperature -7 °C.

Tuesday

Cloudy with flurries, southeast wind 15-30 km/h, treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Avoid freshly wind loaded terrain features.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Avalanche Problems

Storm Slabs

30-60 cm of snow has accumulated over the previous 2 days. This snowfall was accompanied by moderate to strong southeast and southwest wind. Expect to find thick wind slabs in lee terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Loose Wet

As the temperature cools through the day Saturday the likelihood of triggering wet loose avalanches at lower elevations will decrease.

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 2