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Avalanche Forecast

Archived

Dec 9th, 2025–Dec 10th, 2025

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
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 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

Northwest Coastal, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson.

Heavy snowfall continues, combined with strong winds and warm temperatures it will keep the avalanche danger HIGH.

Avoid avalanche terrain.

Confidence

Moderate

Avalanche Summary

On Tuesday, explosive control and natural avalanches were reported up to size 2.
On Monday, a natural avalanche cycle up to size 3 was reported.
With more snow and strong forecast winds, you can expect this to be the story on Wednesday.

Snowpack Summary

Heavy snowfall continues to add to the upper snowpack with up 120 cm of recent storm snow in the alpine. Strong southwest winds have loaded leeward slopes and potentially scoured windward slopes down to an old melt-freeze crust.

Buried surface hoar crystals may linger in isolated sheltered areas.

The mid and lower snowpack is expected to be strong, with frozen crusts or dense, settled snow.

At treeline around Terrace we expect a snow depth of 200-250 cm. 250-350 cm around Stewart. Snowpack depth gradually thins as elevation decreases.

Weather Summary

Tuesday Night
Cloudy. 15 to 20 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Wednesday
Mostly cloudy. 10 to 15 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Thursday
Mix of sun and clouds. 2 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -9 °C.

Friday
Mostly sunny. 20 km/h west ridgetop wind. Treeline temperature -14 °C.







More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.

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.