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Avalanche Forecast

Archived

Dec 24th, 2025–Dec 25th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Below Threshold.

Regions

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

Even small avalanches can have serious consequences in extreme cold.

Carefully assess or avoid steep, wind-loaded slopes.

Confidence

Low

  • Uncertainty is due to the limited number of field observations.

Avalanche Summary

Observations are limited due to extreme cold. On Monday, a size 2 wind slab occurred on a south aspect near Tutshi Lake, indicating that ongoing outflow winds are continuing to build wind slabs.

Snowpack Summary

The upper snowpack is heavily wind affected, with widespread sastrugi and hard wind slabs in open terrain. Cold temperatures are faceting the snowpack, allowing wind slabs to persist longer than usual.

Surface facets are forming and will probably bond poorly to the snow arriving this weekend.

Snowpack depths vary widely due to wind, but average around 100 cm across the region.

Weather Summary

Wednesday Night
Clear skies. 10 km/h variable ridgetop wind. Treeline temperature -24 °C.

Thursday
Mix of sun and clouds. 1 cm of snow. 30 km/h northeast ridgetop wind. Treeline temperature -27 °C.

Friday
Sunny. 20 km/h northeast ridgetop wind. Treeline temperature -29 °C.

Saturday
Mostly cloudy. 5 cm of snow. 10 km/h south ridgetop wind. Treeline temperature -27 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use ridges or ribs to avoid areas of wind-loaded snow.
  • Watch for areas of hard wind slab on alpine features.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.