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Avalanche Forecast

Archived

Mar 25th, 2026–Mar 26th, 2026

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, Rossland, Ymir, Crawford, Moyie, St. Mary, Kokanee, Retallack, Valhalla.

Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Avoid steep, rocky, and wind affected areas where triggering slabs is more likely.

Confidence

High

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.

Avalanche Summary

On Tuesday, numerous skier triggered size 1 wind slabs were reported on primarily north/east aspects at treeline and above.

Last week's rain and warm temperatures triggered a widespread natural slab avalanche cycle up to size 4.

If you are heading into the backcountry, please consider sharing conditions via the MIN.

Snowpack Summary

10 to 15 cm of new snow and moderate southwest winds formed wind slabs on lee aspects at upper elevations. These slabs are most likely to be reactive on steep slopes below ridgetops.

The new snow sits on a crust that is 5 to 20 cm thick in most locations. It may become thinner at upper elevations.

The mid and lower snowpack is well settled and strong in most areas.

Weather Summary

Wednesday Night
Mostly cloudy. 3 to 10 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -7 °C.

Thursday
Mix of sun and clouds. 30 km/h west ridgetop wind. Treeline temperature -9 °C.

Friday
Mix of sun and clouds. 30 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Saturday
Mix of sun and clouds. 30 km/h southwest ridgetop wind. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

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.