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Avalanche Forecast

Archived

Dec 24th, 2025–Dec 25th, 2025

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

Regions

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

New snow & wind may build reactive storm slabs overnight.

If you see more than 20 cm of new snow in your area, hazard is CONSIDERABLE and storm slabs may be more reactive than expected.

Confidence

Moderate

  • Forecast snowfall amounts are uncertain.
  • The snowpack structure is generally well understood.

Avalanche Summary

Wednesday, explosives triggered small storm slabs in the Lizard Range.

Tuesday, two size 1.5 naturally triggered storm slabs occurred in steep wind loaded alpine terrain in the Lizard range, along with some loose dry sluffing. Explosive control also triggered size 1 to 1.5 storm slabs in wind loaded north through east-facing slopes.

With continued snowfall and wind in the forecast, we expect both human and naturally triggered storm slabs to be possible on Thursday.

Snowpack Summary

Up to 15 cm of new snow accompanied by moderate to strong southwesterly wind is expected to accumulate by Thursday afternoon. This adds to over 50 to 80 cm of wind-affected, settling snow that is generally bonding well to the mid December crust.

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

Below 1500 m, the snowpack drastically diminishes with elevation, making travel difficult, with many early-season hazards.

Weather Summary

Wednesday Night

Cloudy with 5 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m dropping to 1700 m.

Thursday

Mostly cloudy with 0 to 5 cm of snow. 35 km/h southwest ridgetop wind. Treeline temperature -1°C. Freezing level 1500 m.

Friday

Cloudy with 5 to 20 cm of snow. 35 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1400 m.

Saturday

Cloudy with 10 to 30 cm of snow. 30 km/h variable ridgetop wind. Treeline temperature -16 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Use ridges or ribs to avoid areas of wind-loaded snow.

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.