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Avalanche Forecast

Dec 18th, 2024–Dec 19th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Allow time for the snowpack to stabilize after recent snow and wind loading.

Confidence

Moderate

Avalanche Summary

Natural avalanches have likely been occurring on Wednesday, particularly in areas with more than 30 cm of new snow and on wind-loaded slopes.

At the time of publishing, we have not received any reports of avalanche activity.

Snowpack Summary

As much as 30 cm of new snow has fallen since Tuesday night. Deeper deposits of snow have likely formed in lee-facing terrain features at upper elevations from recent southwest winds.

Below the recent snow, the upper snowpack has a mix of crusts and surface hoar layers approximately 30 to 60 cm deep. However, assessing the distribution of current weak layers is difficult because in some areas a freezing rain crust destroyed or buried the surface hoar.

The lower snowpack is strong and bonded. Treeline snow depths range from 100 to 180 cm.

Weather Summary

Wednesday Night

Partly cloudy. 40 to 50 km/h west ridgetop wind. Treeline temperature -5 °C.

Thursday

Cloud increasing through the day. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Friday

Mostly cloudy with 5 to 15 cm of snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature 0 °C.

Saturday

Mostly sunny. 10 to 20 km/h south ridgetop wind. Treeline temperature +2 °C. Freezing level 2300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Stay off recently wind loaded slopes until they have had a chance to stabilize.

Avalanche Problems

Storm Slabs

Recently formed storm slabs remain reactive following heavy snowfall and wind since Tuesday. A weak surface hoar layer beneath the slabs could make them very touchy.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2