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Avalanche Forecast

Archived

Dec 11th, 2025–Dec 12th, 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 and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Kitimat, Nass, Rupert, Seven Sisters, Shames, Howson, Microwave-Sinclair.

Recent storm snow (in excess of 1 m deep!) will take some time to settle and stabilize. Stick to conservative terrain in the meantime.

Confidence

Moderate

Avalanche Summary

During the storm earlier this week, a widespread storm slab avalanche cycle was reported to size 2 in most areas (size 3 in Bear Pass). Natural activity has tapered since Wednesday.

Snowpack Summary

Over 1 m of new snow fell earlier this week. Various temporary interfaces may exist within the storm snow due to wind and temperature changes through the storm.

In some areas, the recent snow may sit on a layer of small surface hoar crystals 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

Thursday night
Mostly cloudy. 10 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Friday
A mix of sun and cloud. 10 km/h northeast ridgetop wind. Treeline temperature -8 °C.

Saturday
Cloudy. 20 cm of snow. 100 km/h south ridgetop wind. Treeline temperature -4 °C.

Sunday
Cloudy. 20 cm of snow. 100 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level rising to 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't let the desire for deep powder pull you into high consequence terrain.
  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

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.