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Avalanche Forecast

Archived

Dec 15th, 2025–Dec 16th, 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

North Rockies, East Kakwa, Kakwa, McGregor, Pine Pass, Tumbler.

Stick to simple terrain, free from overhead hazard. Storm snow is expected to remain sensitive to human triggers, and may produce larger avalanches than you expect.

Confidence

Low

Avalanche Summary

On Sunday, avalanche activity was observed to size 2 in wind affected terrain, limited to the recent storm snow. Observations are limited - a larger and more widespread cycle may have occurred.

Snowpack Summary

Storm totals are expected to reach 40 to 60 cm by Tuesday morning. This adds to the 50 to 80 cm of rapidly settling snow from last week. Upper elevations are likely heavily wind affected, while treeline and below may hold a surface crust from recent rain.

Around 100 cm deep, a layer of surface hoar, facets and/or a crust exists. Uncertainty exists over the reactivity of this layer. In thin snowpack areas, faceted grains or depth hoar may exist at the base of the snowpack.

Weather Summary

Monday Night
Mostly cloudy. 5 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 800 m.

Tuesday
Mostly cloudy. 3 to 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 600 m.

Wednesday
Mostly cloudy. 10 to 20 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -10 °C. Freezing level 300 m.

Thursday
Mix of sun and clouds. 1 to 5 mm of precipitation as snow or rain at treeline. 40 km/h south ridgetop wind. Treeline temperature -7 °C. Freezing level 300 m.

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.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep 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.