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Avalanche Forecast

Archived

Dec 30th, 2025–Dec 31st, 2025

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

Regions

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

A temperature inversion could increase the likelihood of avalanche activity at higher elevations.

Reactive wind slabs linger in steep, exposed terrain.

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

20 to 50 cm of recent snow has buried a thin melt-freeze crust at elevations around 2000 m and below. Variable winds have redistributed this snow, creating wind-affected surfaces in exposed, high-elevation terrain.

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

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

Weather Summary

Tuesday Night
Clear skies. 30 to 50 km/h west ridgetop wind. Treeline temperature -4 °C, with a chance of above freezing temperatures in the alpine.

Wednesday
Sunny. 40 to 60 km/h west ridgetop wind. Treeline temperature -3 °C, with a chance of above freezing temperatures in the alpine.

Thursday
Sunny. 20 to 40 km/h west ridgetop wind. Treeline temperature -3 °C.

Friday
Mostly cloudy. 0 to 3 cm of snow. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -4 °C.

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.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.
  • 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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.