Avalanche Forecast

Archived

Dec 7th, 2025–Dec 8th, 2025

Alpine

Natural and human triggered avalanches likely.

Treeline

Natural and human triggered avalanches likely.

Below Treeline

Natural avalanches unlikely, human triggered possible.

Alpine

Natural and human triggered avalanches likely.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Natural avalanches unlikely, human triggered possible.

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Natural avalanches unlikely, human triggered possible.

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

A big storm is forecast, bringing significant snow, rain, strong winds and rising freezing levels.

Avoiding avalanche terrain is strongly recommended.

Confidence

Moderate

Avalanche Summary

Widespread avalanche activity is expected on Monday. 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

30 to 60 mm of precipitation falling as either rain or snow is forecast overnight and throughout Monday. This new snow will add to previous storm slabs that have built over the last few days, which currently overlie older layers such as surface hoar, facets, and sun crusts.

The freezing level is forecast to rise to around 2100 m by Monday afternoon, which will likely leave the snow surface moist or wet at lower elevations.

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

Check out this great MIN for recent observations off the Coquihalla.

Weather Summary

Sunday Night
Cloudy. 5 to 15 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1400 m.

Monday
Cloudy. 20 to 45 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. 20 to 30 mm of precipitation as snow or rain at treeline. 50 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1400 m.

Wednesday
Mostly cloudy. 5 to 15 mm of precipitation as snow or rain at treeline. 50 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Avoid avalanche terrain during periods of heavy loading from new snow, wind, or rain.
Avalanche danger will rapidly increase if snow switches to rain.
Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.

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.

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.