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Avalanche Forecast

Archived

Dec 28th, 2025–Dec 29th, 2025

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

Regions

Kootenay Boundary, Purcells, Bonnington, Grohman, Kootenay Pass, Norns, Ymir, Crawford, Moyie, Kokanee, Retallack, Valhalla, Whatshan.

Enjoy the blue skies and fresh powder, but remain wary of wind slabs on all aspects in leeward terrain, especially near ridgetops.

Confidence

Moderate

  • Uncertainty is due to how quickly the snowpack will recover and gain strength.

Avalanche Summary

Saturday & Friday

  • A few size 1 to 2 slabs, both natural and human-triggered occurred in several areas across the region. Generally, they occurred in wind-loaded north through east facing terrain.

Thursday

  • Several naturally triggered small storm slabs were reported near Whitewater.

Wednesday

  • Numerous storm slabs up to size 2 were observed across the region.

Snowpack Summary

At upper elevations, variable winds have blown snow into wind slabs in leeward areas.

20 to 40 cm of settling storm snow overlies a rain crust from Dec 24th, which goes as high as 1700 to 2100 m in the region.

The mid and lower snowpack is generally well-settled, but contains multiple crust layers with some overlying facets observed.

Weather Summary

Sunday Night
Clear skies. 20 km/h west ridgetop wind. Treeline temperature -10 °C.

Monday
Sunny. 20 km/h west ridgetop wind. Treeline temperature -6 °C.

Tuesday
Sunny. 20 km/h variable ridgetop wind. Treeline temperature -3 °C.

Wednesday
Mostly sunny. 20 km/h southwest ridgetop wind. Treeline temperature -1 °C.



More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Be especially cautious as you transition into wind-affected terrain.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

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.