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Avalanche Forecast

Archived

Dec 4th, 2025–Dec 5th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Boundary, Ningunsaw, Ningunsaw, Ningunsaw.

Slopes sheltered from the wind could still hold good riding and lower avalanche danger.

Confidence

Low

Avalanche Summary

On Wednesday, west of Bell II, several large (up to size 2.5) glide slab avalanches were reported.

On Tuesday, north of Stewart, a small vehicle triggered wind slab avalanche was reported. Also, numerous small (up to size 1.5) loose dry avalanches were reported below 1500 m, and small (up to size 1.5) wind slab avalanches in northerly alpine terrain.

If you are getting out in the backcountry, consider making a post on the MIN (Mountain Information Network).

Snowpack Summary

Up to 25 cm of recent snow and moderate to strong southeast through west wind may have formed reactive wind slabs on leeward slopes. Expect to find soft snow in sheltered areas. A layer of weak, feathery crystals may be found under the recent snow.

A 2 to 10 cm thick rain crust can be found down 50 to 100 cm at 1400 m and below. This layer is currently not an avalanche concern.

At treeline we expect a snow depth of 250 cm or more. Snowpack depth tapers with elevation to around 50 cm at valley bottoms. Many early season hazards are just below the surface below treeline.

Weather Summary

Thursday Night
Mostly cloudy. 10 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.

Friday
Mostly cloudy. 10 km/h variable ridgetop wind. Treeline temperature -5 °C. Freezing level 300 m.

Saturday
Cloudy. Up to 10 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 400 m.

Sunday
Cloudy. 10 to 25 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
  • Shooting cracks, whumpfs, and recent avalanches are strong indicators of an unstable snowpack.
  • Be cautious of buried obstacles, especially below treeline.

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.