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Avalanche Forecast

Archived

Dec 28th, 2025–Dec 29th, 2025

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.
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 is expected to bond poorly to the old wind effected surface.

Avoid avalanche terrain.

Confidence

Avalanche Summary

Observations are limited due to extreme cold. 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

Sunday Night
Cloudy. 20 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -25 °C.

Monday
Cloudy. 15 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -26 °C.

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

Wednesday
Mix of sun and clouds. 4 to 5 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 fresh storm slabs building throughout the day.
  • Storm slab size and sensitivity to triggering will likely increase through the day.

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.