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Avalanche Forecast

Archived

Dec 28th, 2025–Dec 29th, 2025

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.
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 possible, human triggered probable.

Regions

Northwest Inland, Kitimat, Nass, Rupert, Seven Sisters, Shames, Howson.

New snow, strong winds and rising freezing levels will create dangerous avalanche conditions.

Avoid avalanche terrain.

Confidence

Moderate

  • Uncertainty is due to the timing, track, & intensity of the incoming weather system.
  • Uncertainty is due to the limited number of field observations.

Avalanche Summary

A natural avalanche cycle is expected to occur throughout the duration of this storm.

Large avalanches have been reported running from the alpine into below treeline elevations in the Skeena River corridor. Details are limited at this time.

Up to 50 cm of new snow, significant precipitation in the coming days, and rising freezing levels will keep avalanche danger elevated.

Snowpack Summary

30 to 50 cm of snow has fallen over the past 2 days, accompanied by strong southwest winds. This new snow has fallen on faceted snow from the recent cold weather. The new snow is not expected to bond well to the previous faceted surface.

Last week, more than 100 cm of heavy snow fell, strengthening the snowpack and reducing the likelihood of triggering older layers from early December (which include buried surface hoar and crusts).

Snowpack depth is up to 350 cm at treeline.

Weather Summary

Sunday Night
Cloudy. 10 to 30 cm of snow. 70 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Monday
Cloudy. 10 to 20 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Tuesday
Cloudy. 10 to 40 mm of precipitation as snow or rain at treeline. 60 km/h south ridgetop wind. Treeline temperature 0 °C.

Wednesday
Mostly cloudy. 5 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.