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Avalanche Forecast

Archived

Dec 4th, 2025–Dec 5th, 2025

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

Regions

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

New snow throughout the day will increase the likelihood of avalanches.

Retreat to mellower terrain if you find signs of instability like shooting cracks.

Confidence

Low

Avalanche Summary

New snow is expected to cause an active storm slab avalanche cycle.

If you are getting out in the backcountry, consider making a post on the MIN (Mountain Information Network). You can share riding conditions, avalanche or snowpack observations, even just a photo or two.

Snowpack Summary

Heavy snowfall will add 25 cm to the upper snowpack, making 75 cm of snow that is sitting on a crust from recent high freezing levels and rain.

Spotty surface hoar crystals may still be present 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 100-150 cm. 200-300 cm around Stewart. Snowpack depth gradually thins as elevation decreases to be 50 cm at valley bottoms.

Many early season hazards are just below the surface below treeline.

Weather Summary

Thursday Night
Cloudy. up to 3 cm of snow. 20 km/h southwest ridgetop wind Treeline temperature -1 °C. Freezing level 1000 m.

Friday
Cloudy. 15 to 25 cm of snow. 10 km/h variable ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.

Saturday
Mostly cloudy. 4 to 12 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 900 m.

Sunday
Cloudy. 15 to 40 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1200 m.



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.
  • Investigate the bond of the recent snow before committing to your line.

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.