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Avalanche Forecast

Archived

Dec 17th, 2025–Dec 18th, 2025

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 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, human triggered possible.

Regions

South Coast, Powell River, North Shore, Sasquatch, Sky Pilot, Tetrahedron.

Hard to imagine an avalanche with the current state of the coastal ranges, but 70+ cm is enough to bring a LOT of avalanche terrain online. Stick to simple or non-avalanche terrain and enjoy!

Confidence

Avalanche Summary

No recent avalanches have been reported and, as of Wednesday, they would be quite unlikely. Observations are limited in this area, but so is the snowpack, for now..

Big changes are coming in the next storm with up to 70 + cm forecast, so expect a spike in avalanche activity, even in previously below-threshold terrain.

If you head out into the backcountry, do so cautiously and consider sharing your observations on the MIN.

Snowpack Summary

Heavy forecast snowfall promises positive snowpack growth and lively avalanche conditions through the end of the week.

Otherwise, as of Wednesday, a dusting of dry new snow may be found at treeline, more so in the alpine, the product of cooling temperatures at the end of another bout of heavy rain. Below this, the saturated, cooling snowpack is locking in place.

Before the atmospheric river, higher treeline areas held an estimated 20 to 50 cm of snow. It's likely similar now after melt from rainfall and subsequent light snowfall. Coverage diminishes rapidly below 1500 m.

Weather Summary

Wednesday Night
Cloudy with increasing snowfall bringing 15 to 25 cm of new snow. 40 to 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 900 to 1100 m.

Thursday
Cloudy with continuing snowfall bringing 40 to 50 cm of new snow. 50 to 60 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1100 m.

Friday
Mostly cloudy with scattered flurries bringing 10 cm of new snow, including overnight amounts. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 800 m.

Saturday
Cloudy with increasing flurries bringing 15 to 25 cm of new snow, including overnight amounts. 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use increased caution at all elevations. Storm snow is forming touchy slabs.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Don't let storm day fever lure you into consequential terrain.

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.