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Avalanche Forecast

Archived

Dec 23rd, 2025–Dec 24th, 2025

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
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 Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

The snowpack needs time to adjust to significant new snow and wind this week.

Stormy conditions on Wednesday will continue to build slabs that could be surprisingly deep and reactive.

Confidence

Moderate

  • Uncertainty is due to the limited number of field observations.

Avalanche Summary

No new avalanches have been reported at the time of publishing, but observations have been limited by stormy weather.

Looking forward to Wednesday, recently formed storm slabs are expected to remain reactive to human-triggering, especially in wind-loaded terrain.

Snowpack Summary

Up to 15 cm of new snow by end of day Wednesday overlies 50 to 70 cm of recent storm snow. Strong southerly wind has left a variety of surfaces - wind slabs and loaded pockets in lee features, scoured rock in open terrain, and storm slabs and softer snow in sheltered areas.

This new snow covers a crust that becomes increasingly supportive above 1700 m.

A deeper crust with associated facets, formed in mid-November, exists 50 to 150 cm below the surface.

Weather Summary

Tuesday Night
Mostly cloudy. 1 cm of snow. 10 km/h southeast ridgetop wind. Treeline temperature -7 °C.

Wednesday
Cloudy. 10 to 15 cm of snow. 10 km/h southeast ridgetop wind. Treeline temperature -7 °C.

Thursday
Mix of sun and clouds. 1 cm of snow. 10 km/h south ridgetop wind. Treeline temperature -7 °C.

Friday
Mix of sun and clouds. 1 to 2 cm of snow. 10 km/h southwest ridgetop wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't let the desire for deep powder pull you into high consequence terrain.
  • Be especially cautious as you transition into wind-affected terrain.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.