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Avalanche Forecast

Archived

Dec 27th, 2025–Dec 28th, 2025

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

Sea To Sky, Brandywine, Garibaldi, Homathko, Powell River, Spearhead, Tantalus.

Recent storm snow has buried various surfaces including a surface hoar layer in sheltered terrain features.

Watch for signs of instability and approach steep slopes with caution.

Confidence

Moderate

  • Uncertainty is due to how quickly the snowpack will recover and gain strength.

Avalanche Summary

Natural avalanches and touchy human triggered activity were reported in the region on Friday. Avalanche were size 1 to 1.5, and 15 to 20 cm deep, with wide propagation.

This MIN report from the Hanging Lake area on Friday shows a touchy storm slab, with several size 1 human triggered avalanches.

Reports of a Surface Hoar layer in the area at treeline could see this problem linger.

Snowpack Summary

Up to 25 cm of recent snow was accompanied by moderate southeast winds, forming storm slabs. This new snow is sitting on a mix of old surfaces, including a layer of surface hoar in sheltered treeline areas, pockets of recent wind slab, and hard melt-freeze crusts in previously exposed terrain.

Since the melt-freeze crust formed and then buried on December 16, a total of 150 cm of snow has accumulated and is settling.

Above 2200 m, this crust is absent and an old crust complex and faceted snow from November is found at the base of the snowpack instead.

Weather Summary

Saturday Night
Partly cloudy. 20 km/h west ridgetop wind. Treeline temperature -9 °C.


Sunday
Cloudy. 3 to 5 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -7 °C.

Monday
Mostly cloudy. 1 to 3 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Tuesday
Mix of sun and clouds. 1 to 2 cm snow above 1700 m, 20 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind-affected terrain.
  • Use small, low consequence slopes to test the bond of the new snow.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.