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Avalanche Forecast

Archived

Dec 26th, 2025–Dec 27th, 2025

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

Regions

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

New snow falling won't stick to the cold snow surface well.

Be cautious in areas that have been loaded with snow by the wind.

Confidence

Moderate

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

Avalanche Summary

Observations are limited due to extreme cold. The most recent avalanche observation was a size 2 wind slab which occurred on a south aspect near Tutshi Lake on Monday. Given the cold temperatures, ongoing wind, and lack of recent observations, it is best to assume wind slabs may still be lingering in leeward terrain features in wind-affected terrain.

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 have formed and the new snowfall this weekend is expected to bond poorly to this weak surface layer.

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

Weather Summary

Friday Night
Partly cloudy. 20 km/h southwest ridgetop wind. Treeline temperature -23 °C.

Saturday
Cloudy. 5 cm of snow. 20 km/h south ridgetop wind. Treeline temperature -21 °C.

Sunday
Mostly cloudy. 10 to 20 cm of snow. 20 km/h east ridgetop wind. Treeline temperature -23 °C.

Monday
Mostly cloudy. 10 to 15 cm of snow. 20 km/h east ridgetop wind. Treeline temperature -24 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

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

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.