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Avalanche Forecast

Archived

Apr 15th, 2026–Apr 16th, 2026

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

Regions

Kootenay Boundary, Lizard-Flathead, Purcells, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, South Okanagan, Ymir, Akamina, Flathead, Lizard, Crawford, Moyie, St. Mary, Kokanee, Retallack, Valhalla.

Investigate how the new snow is bonding to the underlying layers in your area.

Snowfall amounts vary greatly; the danger is likely one step lower in areas that didn't receive at least 15 cm.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.

Avalanche Summary

On Wednesday, west of Creston, ski cuts produced small storm slabs failing 25 cm deep.

Looking forward, riders could trigger storm slabs at higher elevations, particularly if they don't bond well to underlying old surfaces.

Please consider submitting a MIN to let us know what you're seeing out there.

Snowpack Summary

Anywhere from 15 to 50 cm of snow has fallen on Tuesday and Wednesday. This snow either sits on moist snow around treeline or likely on a crust in the alpine.

The snow also fell with moderate to strong winds, forming deeper deposits in lee terrain features. Below 1500 m, all this precipitation fell as rain, wetting an already wet and melting snowpack.

The remainder of the snowpack is strong.

Weather Summary

Wednesday Night
Mostly cloudy. 5 to 10 cm of snow, with the highest amounts south of Nelson, and in the Purcells. 30 km/h west ridgetop wind. Treeline temperature -7 °C.

Thursday
Mostly cloudy. 5 cm of snow. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Friday
Mostly sunny. 20 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Saturday
Mostly sunny. 20 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Carefully evaluate steep lines for wind slabs.
  • Make observations and continually assess conditions as you travel.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.