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Avalanche Forecast

Archived

Dec 31st, 2025–Jan 1st, 2026

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

Regions

Lizard-Flathead, Akamina, Flathead, Lizard, Crowsnest South.

A temperature inversion will keep alpine temperatures warm into Thursday morning, which could lead to an increase in avalanche likelihood until things cool below freezing.

Confidence

Moderate

  • The snowpack structure is generally well understood.
  • Uncertainty is due to difficult to forecast freezing levels.

Avalanche Summary

On Monday, a few large (size 2.5 to 3) explosive-triggered wind slab avalanches occurred in the Crowsnest area. While none of these avalnches propogated particualrly wide, they all ran very far (full path) on old firm, buried crusts.

Over the weekend, numerous explosive and naturally triggered storm or wind slab avalanches occurred, up to 2.5 on various aspects and elevations.

Snowpack Summary

In exposed alpine and treeline areas, wind-affected surfaces persist. On south-facing slopes, either moist snow or a thin crust is expected, depending on cloud cover and local temperatures.

Up to 50 cm of snow since Christmas continues to settle above a thin melt-freeze crust at elevations around 2000 m and below.

The mid and lower snowpack is characterized by multiple crusts, with moist snow persisting near the base in some areas.

Snow depths at treeline generally range from approximately 100 to 200 cm.

Weather Summary

Wednesday Night
Clear skies. 40 km/h west ridgetop wind. Treeline temperature -3 °C with a chance of above-freezing temperatures in the alpine.

Thursday
Mostly sunny. 40 km/h southwest ridgetop wind. Treeline temperature -3 °C, with a chance of above-freezing temperatures in the morning.
Friday
Mostly cloudy. 0 to 3 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Saturday
Mostly cloudy. 2 to 8 cm of snow at treeline. 50 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.