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Avalanche Forecast

Archived

Dec 20th, 2025–Dec 21st, 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 avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Sasquatch, Coquihalla, Harrison-Fraser, Manning, Skagit.

Stormy weather continues, creating dangerous avalanche conditions at upper elevations.

Confidence

Moderate

  • We are confident the likelihood of avalanche will increase with the arrival of the forecast weather.

Avalanche Summary

No recent avalanche activity has been reported in the past several days.

Natural avalanche activity remains possible with continued snowfall.

Snowpack Summary

Higher elevations have accumulated upwards of 60 cm of storm snow over the last few days, with more forecast falling Sunday.

A melt-freeze crust buried earlier in the week is now located approximately 40 to 80 cm below the surface at higher elevations, with wet, dense snow beneath it.

Deeper in the snowpack, a crust with facets, formed in mid-November, may exist 100 to 160 cm below the surface.

Total snowpack depths range from roughly 100 to 200 cm at higher elevations, thinning rapidly below treeline.

Weather Summary

Saturday night
Cloudy. 15 to 20 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Sunday
Cloudy. 5 to 15 cm of snow. 50 km/h south ridgetop wind. Treeline temperature -3 °C.

Monday
Cloudy. 25 to 35 cm of snow. 50 km/h south ridgetop wind. Treeline temperature -4 °C.

Tuesday
Mostly cloudy. 10 to 30 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't let storm day fever lure you into consequential terrain.
  • Be especially cautious as you transition into wind-affected terrain.
  • Minimize exposure during periods of heavy loading from new snow and wind.

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.