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Avalanche Forecast

Archived

Dec 12th, 2025–Dec 13th, 2025

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

Regions

Northwest Coastal, Boundary, Stewart, Ningunsaw, Ningunsaw, Ningunsaw.

Watch for fresh, reactive wind slabs forming at upper elevations as a new system arrives on Saturday.

Confidence

Moderate

Avalanche Summary

During the storm earlier this week, a widespread storm slab avalanche cycle was reported to size 3. Natural activity has tapered dramatically since the end of the storm on Wednesday.

Snowpack Summary

New snow begins to fall Saturday, over a hefty dose of storm snow from earlier this week. All of this snow will begin to settle as temperatures become milder over the weekend.

In some areas, the recent snow may have buried a layer of small surface hoar crystals over 1 m deep in sheltered terrain. A well-bonded crust may be found in the mid snowpack below 1400 m.

In general, this season's upper elevation snowpack is shaping up as the ideal coastal snowpack; deep, strong and uncomplicated. Snowpack depths in excess of 300 cm can be found at treeline elevations.

Weather Summary

Friday night
Clear. 20 km/h southeast ridgetop wind. Treeline temperature -23 °C.

Saturday
Cloudy. 5 to 10 cm of snow. 30 to 40 km/h southeast ridgetop wind. Treeline temperature -17 °C.

Sunday
Cloudy. 10 to 20 cm of snow. 50 km/h south ridgetop wind. Treeline temperature -10 °C.

Sunday
Cloudy. 20 to 30 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Pay attention to the wind; once it starts to blow, sensitive wind slabs are likely to form.
  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.

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.