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Archived

Avalanche Forecast

Dec 6th, 2024–Dec 7th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Tutshi, Wheaton, White Pass East, White Pass West, Yukon.

Wind and rain have ravaged the region.

If you travel to the alpine in search of soft snow, be cautious in wind-loaded areas. Recently formed wind slabs may be deep and reactive.

Confidence

Low

Avalanche Summary

A natural avalanche cycle occurred in the past few days as rain and warm temperatures infiltrated the region. See this MIN for more details.

As temperatures cool, this large natural avalanche activity will subside. Riders should shift their focus to the potential for recently formed wind slabs to be reactive to rider-triggering at upper elevations.

Please consider sharing your observations through the Mountain Information Network.

Snowpack Summary

Above 1500 m, new snow has been redistributed by strong southwest winds. Deposits of wind slab as well as heavily wind-affected surfaces exist. At lower elevations, the upper snowpack is moist and we expect the surface to freeze into a solid crust. 

The remainder of the snowpack is dry, with small faceted crystals to ground. 

Snow depths vary significantly, averaging around 70 to 130 cm at White Pass.

Weather Summary

Friday Night

Cloudy with up to 2 cm of new snow. 5 to 30 km/h south ridgetop wind. Treeline temperature drops to -6 °C.

Saturday

A mix of sun and cloud. 5 to 15 km/h north ridgetop wind. Treeline temperature -7 °C.

Sunday

A mix of sun and cloud with isolated flurries. 30 to 45 km/h south ridgetop wind. Treeline temperature -5 °C.

Monday

Cloudy with light flurries. 50 to 80 km/h south ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.

Avalanche Problems

Wind Slabs

Recent snowfall and wind are expected to have formed fresh, reactive wind slabs in lee areas.

Aspects: North, North East, East, South East, West, North West.

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1 - 2