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Avalanche Forecast

Archived

Dec 13th, 2025–Dec 14th, 2025

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 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.

Regions

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

Although a strong surface or near-surface crust has reduced the likelihood of triggering an avalanche, use caution anywhere the crust is absent or thin and weak.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported since the warm, wet storm earlier this week.

If you've been out in the backcountry, please consider sharing your observations on the MIN.

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

Saturday Night
Partly cloudy. 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1700 m.

Sunday
Mostly cloudy. Trace amounts of snow at treeline. 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 m.

Monday
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 2200 m.

Tuesday
Cloudy. 15 to 25 cm of snow at treeline. 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 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.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Keep in mind that human triggering may persist as natural avalanches taper off.

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.