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Avalanche Forecast

Archived

Dec 27th, 2025–Dec 28th, 2025

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

Regions

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

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

If there is more than 30 cm of new snow where you are treat the hazard as HIGH.

Confidence

Moderate

  • Uncertainty is due to the timing, track, & intensity of the incoming weather system.
  • 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

Up to 30 cm of new snow is now sitting on a heavily wind affected and faceted upper snowpack.

Snowpack depths vary widely due to wind, but average around 130 cm across the region.

Weather Summary

Saturday Night
Cloudy. 15 cm of snow. 10 km/h south ridgetop wind. Treeline temperature -21 °C.

Sunday
Cloudy. 20 cm of snow. 10 km/h southeast ridgetop wind. Treeline temperature -26 °C.

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

Tuesday
Mostly cloudy. 15 to 20 cm of snow. 10 km/h southeast ridgetop wind. Treeline temperature -17 °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

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.