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Avalanche Forecast

Archived

Dec 30th, 2025–Dec 31st, 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, 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

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

Avalanches could become more likely with above-freezing temperatures expected at higher elevations.

Recent snow may not be bonding well to the underlying crust.

Confidence

Moderate

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

Avalanche Summary

Numerous small (size 1 to 1.5) skier-triggered avalanches occurred on Monday, failing on the Dec. 25 crust. Most of these avalanches occurred on northerly terrain around treeline elevations.

Snowpack Summary

20 to 50 cm of recent storm snow continues to settle. A crust, buried on Dec. 25, exists below this recent snow and is variable in distribution. A very thin crust has been reported in some alpine terrain, while it is thicker and more widespread at treeline and below.

The mid and lower snowpack is generally well-bonded and consolidated, with multiple crusts present.

Weather Summary

Tuesday Night
Clear skies. 20 km/h southwest ridgetop wind. Treeline temperature -2 °C, with a chance of above freezing temperatures in the alpine.

Wednesday
Sunny. 30 km/h southwest ridgetop wind. Treeline temperature -2 °C, with a chance of above freezing temperatures in the alpine.

Thursday
Clouds building throughout the day. 20 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Friday
Cloudy. 5 to 10 cm of snow. 20 km/h south ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the crust.
  • Be careful as you transition into wind-affected terrain.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.