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Avalanche Forecast

Archived

Dec 27th, 2025–Dec 28th, 2025

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 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

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

Storm slabs need more time to settle and bond to underlying layers.
Don't let blue skies and fresh powder lure you into consequential terrain!

Confidence

Moderate

  • Uncertainty is due to how quickly the snowpack will recover and gain strength.

Avalanche Summary

Saturday, numerous size 1-2.5 storm slabs were triggered by explosives in the Lizard Range.

Friday, several small wind slabs were triggered with explosives and ski cutting in the Castle Mtn area.

Thursday, natural and explosive triggered slabs up to size 2 were observed in the Lizard Range.

Wednesday, explosive control triggered small storm slabs in the Lizard Range and small wind slabs near Castle Mtn.

Snowpack Summary

Up to 75 mm of precipitation has fallen over the last few days, with the highest amounts in the Lizard Range. This has built widespread storm slabs that still need time to settle and bond. Around 35 cm of the storm snow is sitting on a rain crust that reaches up to 2000 m in parts of the region.

Otherwise, the snowpack is generally well settled. Some additional crusts are buried in the mid-snowpack, but are not concerning at this time.

Below 1500 m, the snowpack rapidly diminishes with elevation.

Weather Summary

Saturday Night
Mostly clear skies. 35 km/h northwest ridgetop wind. Treeline temperature -16 °C.

Sunday
Sunny. 40 km/h west ridgetop wind. Treeline temperature -14 °C.

Monday
Sunny. 50 km/h west ridgetop wind. Treeline temperature -10 °C.

Tuesday
Sunny. 50 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Closely monitor how the new snow is bonding to the crust.
  • Avoid freshly wind-loaded terrain features.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

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.