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Avalanche Forecast

Archived

Dec 26th, 2025–Dec 27th, 2025

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

Regions

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

Don't let blue skies and fresh powder lure you into consequential terrain.

Validate conditions and gather information about the snowpack before committing to slopes.

Confidence

Avalanche Summary

On Thursday

  • Several naturally triggered storm slabs were reported near Whitewater.

On Wednesday

  • Numerous storm slabs up to size 2 were triggered by explosive control near Kootenay Pass.

  • Several naturally triggered avalanches up to size 1.5 were observed near Whitewater.

  • A widespread natural avalanche cycle occurred in the Kokanee Glacier Park area.

Snowpack Summary

10 to 20 mm of rain on Wednesday created a rain crust that goes as high as 1700 to 2100 m in the region, with snow falling at upper elevations.

10 to 20 cm of snow from Thursday, combined with an additional 5 to 15 cm in the forecast for Friday night, will continue to build reactive storm slabs. The slabs may be poorly bonded to the new rain crust.

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

Weather Summary

Friday Night
Mostly cloudy. 5 to 15 cm of snow. 35 km/h variable ridgetop wind. Treeline temperature -10 °C.

Saturday
Sunny. 35 km/h northwest ridgetop wind. Treeline temperature -17 °C.

Sunday
Sunny. 20 km/h northwest ridgetop wind. Treeline temperature -10 °C.

Monday
Mostly sunny. 30 km/h west ridgetop wind. Treeline temperature -8 °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.
  • Be especially cautious as you transition into wind-affected terrain.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.
  • Closely monitor how the new snow is bonding to the crust.

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.