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Avalanche Forecast

Archived

Dec 8th, 2025–Dec 9th, 2025

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

Regions

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

A substantial amount of new snow is loading buried weak layers, likely causing natural avalanches. Travel in avalanche terrain is not recommended.

Confidence

High

Avalanche Summary

The only reported avalanche on the weekend was a large storm slab on a southwest slope, that may have released on the weak layer of faceted grains described in the Snowpack Summary. However, we anticipate that a widespread avalanche cycle occurred on Monday and will continue to occur into Tuesday with rapid loading from stormy weather.

Snowpack Summary

The region is undergoing heavy snow loading. Up to 40 cm of snow accumulated on Monday and another 20 to 30 cm of snow could accumulate by Tuesday afternoon. This snow is falling with strong southwest wind.

All this snow is loading a weak layer of surface hoar and/or faceted grains found in the middle of the snowpack. The layer of facets may be associated with a hard melt-freeze crust. In thin snowpack areas, faceted grains may extend to the ground.

Average snow depths at treeline range from 70 to 120 cm and decrease rapidly at lower elevations.

Weather Summary

Monday Night
Cloudy. 10 to 20 cm of snow with local amounts up to 30 cm possible. 50 km/h west ridgetop wind. Treeline temperature -7 °C.

Tuesday
Cloudy. 5 to 10 cm of snow with local areas up to 20 cm possible. 40 km/h west ridgetop wind. Treeline temperature -8 °C.

Wednesday
Cloudy. 15 to 25 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Thursday

Morning clouds then clearing. 2 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -18 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Travel in alpine terrain is not recommended.
  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Be cautious of buried obstacles, especially below treeline.

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.