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Avalanche Forecast

Archived

Nov 30th, 2025–Dec 1st, 2025

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

Regions

Boundary, Ningunsaw, Ningunsaw, Ningunsaw.

Stick to terrain sheltered from the wind where you'll find the softest snow and the lowest avalanche danger.

Confidence

Low

Avalanche Summary

Looking forward to Monday, we expect that human triggered wind slab avalanches will be likely in wind exposed terrain.

Natural, glide slab avalanches up to size 2.5 have been recently observed throughout the region. These hazards should be given a wide berth.

Snowpack Summary

Up to 20 cm of new snow and moderate to strong southwest wind may be forming reactive wind slabs on leeward slopes.

Wind has varied in direction over the past few days. Expect most exposed slopes to be wind-affected.

A 2 to 10 cm thick rain crust can be found down 60 to 90 cm at 1400 m and below. This layer is currently not an avalanche concern.

At treeline there is an average snowpack depth of 300 cm. 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. 10 cm of snow at treeline. 30-55 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday
Mostly cloudy. 4 to 7 cm of snow at treeline. 30-55 km/h southwest ridgetop wind. Treeline temperature -2 °C.

Tuesday
Mostly cloudy. 1 cm of snow at treeline. 20 km/h west ridgetop wind. Treeline temperature -3 °C.

Wednesday
Mix of sun and clouds. 4 to 10 cm of snow at treeline. 30 km/h southwest ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Be cautious of buried obstacles, especially below treeline.
  • Make observations and continually assess conditions as you travel.

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.