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Avalanche Forecast

Archived

Dec 7th, 2025–Dec 8th, 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 unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Boundary, Ningunsaw, Ningunsaw, Ningunsaw.

New snow and wind will make dangerous avalanche conditions especially at higher elevations.



Confidence

Low

Avalanche Summary

On Saturday numerous small ( size 1 ) natural storm and wind slabs were reported.

On Friday a few small ( size 1 to 2 ) natural wind slab avalanches were reported in lee features.

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

Snowpack Summary

Recent snow ( 15 to 30 cm ) combined with moderate to strong wind have formed wind slabs on leeward slopes. Expect to find soft snow in sheltered areas. A layer of weak, feathery crystals (surface hoar) may be found 30 to 50 cm down.

A 2 to 10 cm thick rain crust can be found down 50 to 100 cm at 1400 m and below.

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

Sunday Night
Cloudy. 5 to 10 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday
Cloudy. 10 to 20 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -6 °C.

Tuesday
Partly cloudy. 5 cm of snow. 10 to 20 km/h west ridgetop wind. Treeline temperature -12 °C.

Wednesday
Partly cloudy. Up to 8 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -20 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Shooting cracks, whumpfs, and recent avalanches are strong indicators of an unstable snowpack.
  • Be cautious of buried obstacles, especially below treeline.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

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.