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Avalanche Forecast

Archived

Dec 22nd, 2025–Dec 23rd, 2025

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

Regions

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

Stick to sheltered, lower-angled terrain for the best and safest riding.

Treat the danger as HIGH if you see more than 25 cm of new snow from overnight.

Confidence

Moderate

  • Forecast snowfall amounts are uncertain.

Avalanche Summary

Riders near Tetrahydron on Sunday were able to trigger small but reactive slabs around 1000 to 1100 m. They also observed signs of instability, like shooting cracks, in their travels (see details here).

With ongoing snowfall and wind, we expect both natural and human-triggered storm slabs to remain likely on Tuesday.

Snowpack Summary

Stormy conditions continue to build a previously thin snowpack. A thin melt-freeze crust may be found below 40 to 50 cm of new snow. This covers an additional 50-120 cm of snow that accumulated last week.

Beneath the recent snowfall, the snowpack is generally well-settled, consisting of moist, dense snow. Snow depths at the treeline are estimated to range from 80 to 170 cm.

Weather Summary

Monday Night
Cloudy. 10 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -6 °C.


Tuesday
Mostly cloudy. 10 to 15 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -6 °C.

Wednesday
Mostly cloudy. 4 to 5 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -4 °C.

Thursday
Mix of sun and clouds. 1 to 2 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -1 °C. Freezing level 1100 m.

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.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.

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.