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Avalanche Forecast

Archived

Dec 22nd, 2025–Dec 23rd, 2025

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

Regions

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

Conditions will change with elevation and wind exposure. Reactive slabs remain a concern in wind-loaded features, but sheltered terrain holds great riding conditions.

Confidence

Moderate

  • Uncertainty is due to the limited number of field observations.
  • Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Avalanche Summary

On Sunday, evidence of a previous natural avalanche cycle was observed. Explosive control and human triggered avalanches were reported to size 1.5 in wind affected features. Loose dry sluffing was observed in sheltered terrain.

Moving forward, we expect reactivity of this nature to continue.

Snowpack Summary

Light accumulations of fresh snow are expected to fall by Tuesday morning, over 50-70 cm of wind affected, settling snow. A crust sits below, which is generally considered to be bonding well to the snow around it.

Below the crust, the snowpack is generally well settled and moist to the ground in most areas.

Weather Summary

Monday Night
Cloudy. 2 to 4 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level 1100 m.

Tuesday
Cloudy. 1 to 2 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1300 m.

Wednesday
Mostly cloudy. 5 to 15 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 900 m.

Thursday
Mostly cloudy. 2 to 5 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.

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.