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Avalanche Forecast

Archived

Dec 29th, 2025–Dec 30th, 2025

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
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.

Only simple terrain with no exposure to overhead hazard is suitable for the current conditions. 

Storm slabs have the potential to step down and trigger large, destructive avalanches.

Confidence

Avalanche Summary

On Monday, there were reports of several natural avalanches up to size 2.5 observed from the road in White Pass.

Observations are still limited at this time.

Snowpack Summary

Up to 45 cm of new snow is now sitting on a heavily wind-affected and faceted snowpack.

Snowpack depths vary widely due to wind, but average around 150 cm across the region.

Weather Summary

Monday Night
Mostly cloudy. 3 to 5 cm of snow. 10 km/h south ridgetop wind. Treeline temperature -19 °C.

Tuesday
Mostly cloudy. 10 to 15 cm of snow. 20 km/h east ridgetop wind. Treeline temperature -18 °C.

Wednesday
Mostly cloudy. 4 to 10 cm of snow. 10 km/h south ridgetop wind. Treeline temperature -15 °C.

Thursday
Mostly cloudy. 1 to 2 cm of snow. 10 km/h east ridgetop wind. Treeline temperature -19 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Keep your guard up at lower elevations. Storms slabs have been reactive at all elevations.

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.