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Avalanche Forecast

Archived

Dec 6th, 2025–Dec 7th, 2025

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Storm slabs continue to build and remain reactive in many areas; pick conservative terrain.

The snowpack remains very shallow at lower elevations.

Confidence

Low

Snowpack Summary

Around 25 to 60 mm is expected to have fallen in the last few days as rain or snow at treeline elevations, accompanied by strong southwesterly winds.

The new snow has built dense and possibly wet storm slabs that are not expected to bond well with underlying layers such as surface hoar, facets, and sun crusts. In wind exposed areas, new snow is expected to have redistributed into lee features, forming more reactive slabs.

Above treeline, a crust is buried 60 to 80 cm, and extends to the ground. Total snowpack depths range from around 80 to 150 cm deep at treeline, and diminish rapidly at lower elevations.

Weather Summary

Saturday Night
Cloudy. 4 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1300 m.

Sunday
Cloudy. 10 to 20 mm of snow or rain at treeline. 50 km/h southwest ridgetop wind. Treeline temperature -0 °C. Freezing level 1700 m.

Monday
Cloudy. Up to 50 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level rising to 2100 m.

Tuesday
Mostly cloudy. 0 to 5 cm of snow. 35 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1600 m.




More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche danger will rapidly increase if snow switches to rain.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Carefully manage your exposure to overhead hazards.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.

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.