Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Dec 20th, 2025–Dec 21st, 2025

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

Regions

South Columbia, Esplanade, Jordan, North Selkirk, Dogtooth, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold.

Human-triggered avalanches remain likely, especially in freshly wind-loaded features.

Stick to conservative terrain while the snowpack settles and stabilizes.

Confidence

Moderate

  • Uncertainty is due to how quickly the snowpack will recover and gain strength.
  • Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Avalanche Summary

On Friday, storm/wind slabs were running naturally size 2-2.5, with a few size 1-1.5 triggered accidentally by riders. These were on north to east aspects, mostly at alpine and treeline elevations.

Many operations throughout the region conducted explosive control work on Friday as well, producing storm/wind slabs size 1.5-2.5, with one larger instance in the West Purcells of a step-down to the November crust on a southeast aspect in the alpine.

Snowpack Summary

Ongoing flurries continue to add to 60 to 90 cm of recent storm snow sitting over a hard crust that extends up to 2300 m. Wind is redistributing the recent snow in exposed terrain.

Where the crust is thick and supportive, it effectively caps a couple of mid snowpack instabilities, making them difficult to trigger. These layers, now over 150 cm deep, may still be a concern in the high alpine where the crust is thin or nonexistent.

Weather Summary

Saturday Night
Cloudy. 5 to 10 cm of snow, 15+ cm in high terrain in the central Selkirks and west Purcells. 40 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Sunday
Mostly cloudy. 5 to 10 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -7 °C.

Monday
Mostly cloudy. 5 to 15 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Tuesday
Mix of sun and clouds. 5 to 10 cm of snow. 20 km/h south ridgetop wind. Treeline temperature -6 °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.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Don't let the desire for deep powder pull you into high consequence terrain.

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.