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Avalanche Forecast

Archived

Dec 28th, 2025–Dec 29th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

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

Human-triggered wind slabs are possible and may be more reactive where they have formed over a surface hoar layer or temperature crust.

Don't commit to steep slopes if the snow feels dense.

Confidence

Moderate

  • Uncertainty is due to rapidly fluctuating freezing levels.

Avalanche Summary

A mix of human triggered size 1 to 1.5 wind slab and storm slab avalanches were reported on Saturday throughout the region.

This MIN report near Decker Mountain from Saturday shows a heavily wind affected surface and human-triggered size 1.

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

Snowpack Summary

Up to 25 cm of wind affected 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 was 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

Sunday Night
Cloudy. 1 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -4 °C.

Monday
Mix of sun and clouds. 20 km/h west ridgetop wind. Treeline temperature -2 °C. Freezing level rising through the day.

Tuesday
Mostly sunny. 20 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 2100 m.

Wednesday
Mostly cloudy. 5 to 10 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1500 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.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Wind slabs are isolated, but may remain reactive.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.