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Avalanche Forecast

Archived

Dec 10th, 2025–Dec 11th, 2025

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

South Coast Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

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

Moderate

Avalanche Summary

On Tuesday, a deep and large slab (size 2.5-3) was observed on Matier’s East Ridge, with a crown up to 2 meters deep.

Previous avalanche observations were reported over the last weekend, including a wind slab accidentally triggered by a skier in Y Couloir of Mount Ronayne, and a natural avalanche (size 2.5) above Darkside Lake near Steep Peak.

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

Snowpack Summary

At elevations of 1800 m and above, 20 to 30 cm of new heavy snow can be found. Strong wind redistributed the recent snow on leeward features and scoured slopes on windward alpine terrain. A surface crust is likely present from 1700 m and below.

Several layers, including surface hoar, facets, and a thin crust, can be found 40 to 65 cm below the surface. A firm crust, formed in early November, is buried 60 to 90 cm at alpine and treeline elevations. Weak facets have been spotted above and below the crust.

Snowpack height averages around 100 cm at treeline and decreases rapidly below about 1500 m.

Weather Summary

Wednesday Night
Cloudy. 5 to 10 cm of snow at treeline. 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1500 m.

Thursday
Mix of sun and clouds. 20 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level 1200 m.

Friday
Mostly cloudy. Up to 5 cm of snow at treeline. 30 km/h southwest ridgetop wind. Treeline temperature -3°C. Freezing level 1500 m.

Saturday
Mostly cloudy. 30 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.
  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

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.