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Avalanche Forecast

Archived

Dec 10th, 2025–Dec 11th, 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 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, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Microwave-Sinclair.

A brief lull in the storm, but the the danger rating remains elevated.

This is not the time to let your guard down.

Seek simple avalanche terrain.

Confidence

Moderate

Avalanche Summary

On Wednesday avalanche activity began to ease as a few explosive and natural avalanches up to size 1.5 were reported.

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.

Snowpack Summary

Up to 120 cm of recent storm snow can be found 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

Wednesday Night
Mostly cloudy. 3 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -7 °C.

Thursday
Mix of sun and clouds. 10 km/h west ridgetop wind. Treeline temperature -10 °C.

Friday
Mix of sun and clouds. 1 to 3 cm of snow. 10 km/h east ridgetop wind. Treeline temperature -12 °C.

Saturday
Mostly cloudy. 10 to 25 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -12 °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.
  • Be aware of the potential for human triggerable storm slabs at lower elevations, even on small features.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

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.