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 12th, 2025–Dec 13th, 2025

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

Regions

Lizard-Flathead, Akamina, Flathead, Lizard, Moyie, St. Mary.

Although a supportive surface crust reduces the likelihood of triggering an avalanche, use caution at higher elevations where the crust may be thinner, weaker, or absent.

Confidence

Moderate

Avalanche Summary

No new avalanche activity has been reported since the recent warm and wet storm.

A widespread avalanche cycle took place on Tuesday and Wednesday on all aspects and elevation bands. Avalanches have ranged from size 1 to 3, with some larger ones failing up to 100 cm deep.

Snowpack Summary

Trace amounts of new snow are accumulating over a widespread melt–freeze crust, which varies in thickness and strength with elevation. Beneath this crust, the snow remains moist due to the recent warm and wet weather. Some alpine areas may remain crust-free.

The mid-snowpack is generally well-settled and well-bonded, sitting above a thick melt-freeze crust that comprises most of the lower snowpack.

Snowpack depths at treeline range from 80 to 150 cm and thin rapidly at lower elevations. In many areas, especially below treeline, slopes lack enough snow to cover ground roughness and produce avalanches.

Weather Summary

Friday Night
Cloudy. 1 to 2 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -4 °C.

Saturday
Cloudy. 1 to 2 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -3 °C.

Sunday
Mix of sun and clouds. 2 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Monday
Mostly cloudy. 10 to 20 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.
  • Keep in mind that human triggering may persist as natural avalanches taper off.
  • 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.