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Avalanche Forecast

Archived

Dec 5th, 2025–Dec 6th, 2025

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

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, Ymir, Kokanee.

Flurries overnight and through the day may deposit upwards of 20 cm by Saturday afternoon. Expect slab size and reactivity to increase as flurries accumulate.

Confidence

Low

Avalanche Summary

No new avalanches reported. If you are out and about in the mountains, please consider posting your observations to the MIN.

Snowpack Summary

Flurries accumulating overnight and through the day could produce upwards of 20 cm by Saturday afternoon.

At treeline and above, around 10-15 cm fresh snow covers faceted snow or surface hoar. The upper snowpack is mixed: wind-affected surfaces in open areas and softer in sheltered spots, all sitting on the mid-November crust buried 30–50 cm deep. Lower in the snowpack, there are several crusts, and in some areas weak, sugary facets can be found near the ground.

Total snowpack depths are roughly 80 to 120 cm, tapering quickly at lower elevations.

In many areas, especially below treeline, there is not enough snow to smooth out surface roughness or reach the threshold needed for avalanches.

Weather Summary

Friday night

Cloudy with 5 to 10 cm of snow. 15 to 30 km/h west ridgetop wind. Treeline temperature -8 °C.

Saturday

Cloudy with flurries, 5 to 15 cm of snow. 15 to 25 km/h west ridgetop wind. Treeline temperature -6 °C.

Sunday

Cloudy with isolated flurries. 5 cm of snow. 15 to 30 km/h west ridgetop wind. Treeline temperature -5 °C.

Monday

Cloudy with snow. 10-30 cm. 20 to 50 km/h south ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Be cautious of buried obstacles, especially below treeline.

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.