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Avalanche Forecast

Archived

Dec 10th, 2025–Dec 11th, 2025

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Precipitation is expected to end Wednesday night, but it’s still unclear how much will fall as rain versus snow. If you're heading out, please share your post-storm observations on the MIN.

Confidence

Low

Avalanche Summary

No recent avalanches have been reported, but observations are very limited in this region.

If you're heading out into the backcountry, please consider sharing your observations on the MIN.

Snowpack Summary

Up to 20 cm of heavy new snow can be found at upper elevations, which was redistributed by strong southerly winds into greater accumulations on lee slopes. This builds upon previous storm slabs, which currently overlie older layers and a thick melt-freeze crust down 50 to 60 cm.

At treeline, a crust is supportive to skis with likely still moist/wet snow underneath. The new snow seems to be bonding well to the surface crust. At lower elevations, the crust is variably breakable.

Total snowpack depths range from around 80 to 150 cm deep at treeline, and diminish rapidly at lower elevations.

Weather Summary

Wednesday Night
Cloudy. 10 to 20 mm of precipitation as snow or rain at treeline. 60 km/h west ridgetop wind. Treeline temperature +2 °C. Freezing level falling to 1700 m.

Thursday
Mostly cloudy. 30 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.

Friday
Cloudy. 5 to 10 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level 1500 m rising to 2000 m.

Saturday
Mostly cloudy. 50 km/h southwest ridgetop wind. Treeline temperature +1 °C. Freezing level 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to rapidly changing conditions.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Keep in mind that the high density of wet avalanches can make them destructive.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.