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Avalanche Forecast

Archived

Dec 9th, 2025–Dec 10th, 2025

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

Regions

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

A warm storm with mixed precipitation is approaching.
Avalanche hazard is expected to increase throughout the day Wednesday.

Confidence

Moderate

Avalanche Summary

No recent avalanches were reported in the region. This past weekend, a large wind slab was accidentally triggered by a skier in Y Couloir of Mount Ronayne from a north alpine slope. Also, a natural avalanche (size 2.5) released naturally 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, 10 to 15 cm of new snow can be found. Strong wind has redistributed the recent snow on leeward features and scoured slopes on windward alpine terrain. A thin, breakable crust is now at the snow surface from 1800 m and below, due to cooling temperatures.

Several layers, including surface hoar, facets, and a thin crust, can be found 30 to 55 cm below the surface. A firm crust, formed in early November, is buried 50 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

Tuesday Night
Mostly cloudy. 30 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1400 m.

Wednesday
Cloudy. 15 to 30 cm of precipitation as snow or rain at treeline. 40 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

Thursday
Partially cloudy. Up to 5 cm of snow at treeline. 20 km/h southwest ridgetop wind. Treeline temperature -3°C. Freezing level 1300 m.

Friday
Mostly cloudy. Up to 5 cm of snow at treeline. 30 km/h southwest ridgetop wind. Treeline temperature -3°C. Freezing level 1300 m.


More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.
  • Be alert to rapidly changing conditions.

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.