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Avalanche Forecast

Archived

Dec 28th, 2025–Dec 29th, 2025

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Snow is available for transport. Moderate winds will build wind slabs at upper elevations.

Actively look for signs of instability and don't commit to steep slopes if the snow feels dense.

Confidence

Moderate

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

Avalanche Summary

No new avalanches reported.

Low density snow is available for transport, we suspect that small wind slabs may build with the forecasted moderate west winds. Human triggering is possible.

Snowpack Summary

Cold, low-density snow has been redistributed by moderate westerly wind, developing wind slabs at upper elevations.

Consecutive storms have accumulated up to 130 cm of settling snow over a crust formed during the warm-up and buried on December 16th.

Snow depths at treeline range widely, from 100 to 300 cm as a result of wind redistribution.

Weather Summary

Sunday Night
Mostly cloudy. 30 km/h west ridgetop wind. Treeline temperature -5 °C.

Monday
Mix of sun and clouds. 30 km/h west ridgetop wind. Treeline temperature -3 °C.

Tuesday
Mix of sun and clouds. 30 km/h southwest ridgetop wind. Treeline temperature 3 °C.

Wednesday
Mostly sunny. 30 km/h southwest ridgetop wind. Treeline temperature 2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Carefully evaluate steep lines for wind slabs.

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.