Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Dec 10th, 2025–Dec 11th, 2025

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

Regions

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

Precipitation is expected to end Wednesday night, but it’s still unclear how much will fall as rain versus snow. If you're heading out, please share your post-storm observations on the MIN.

Confidence

Moderate

Avalanche Summary

Several explosive and human-controlled avalanches were reported in the Whistler/ Blackcomb area on Tuesday. These slabs failed within the new storm snow and ranged from size 1 to 2, with one larger one stepping down to deeper buried layers like the Mid-November crust up to 1 m deep.

If you're heading out into the backcountry, please consider sharing your observations on the MIN.

Snowpack Summary

30 to 45 cm of new snow can be found above 1800 m, which was redistributed by southerly winds in alpine and upper treeline terrain. This adds to previous storm and wind slabs that overlie older layers such as surface hoar, facets, and crusts.

A new breakable, melt-freeze crust, formed earlier this week, is found near the surface at mid-elevation. The mid-November hard crust currently sits 60 to 120 cm deep with facets above and below. Some recent storm slabs have recently stepped down to this layer.

The snowpack is moist at lower elevations, and its height rapidly diminishes below 1100 m.

Weather Summary

Wednesday Night
Cloudy. 10 to 20 mm of precipitation as snow or rain at treeline. 60 km/h west ridgetop wind. Treeline temperature -2°C. Freezing level falling to 1500 m.

Thursday
Mostly cloudy. 40 km/h northwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

Friday
Cloudy. 5 to 10 cm of snow at treeline. 40 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

Saturday
Cloudy. 15 to 20 mm of precipitation as snow or rain at treeline. 40 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 1900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to rapidly changing conditions.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Loose avalanches may start small, but they can grow and push you into dangerous terrain.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.