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Avalanche Forecast

Archived

Dec 21st, 2025–Dec 22nd, 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.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland, Kitimat, Nass, Rupert, Seven Sisters, Shames, Howson.

Conditions vary across the region.

Keep an eye out for reactive wind slabs in unusual places and buried surface hoar in sheltered areas.

Confidence

Moderate

  • Uncertainty is due to extremely variable snowpack conditions reported through the region.

Avalanche Summary

On Saturday, backcountry users found touchy wind slabs on south through westerly slopes in the Shames backcountry. They reported shooting cracks and triggering many slabs during the day.

The same day, people at Anderson also found shooting cracks and propagating slabs between 1000 - 1200 m. These slabs however, failed on surface hoar buried 15 - 20 cm.

Conditions are variable throughout the region. t’s a good idea to continually verify conditions and adjust as you travel.

Snowpack Summary

Many alpine and open treeline areas have seen significant wind effect and wind slabs building from outflow northeasterly winds. You can read more about wind slabs near Shames in this MIN. Other parts of the region however, report only minor wind effect.

This MIN describes touchy buried surface hoar conditions near Anderson that are unique in the region.

New surface hoar has been reported growing in sheltered areas. Several layers of weak surface hoar can be found between 70 to 200 cm deep. Triggering these layers is considered unlikely at this time.

Snowpack depths in excess of 350 cm can be found at treeline elevations.

Weather Summary

Sunday Night
Partly cloudy. 0 to 2 cm of snow. 30 km/h northeast ridgetop wind. Treeline temperature -16 °C.

Monday
Mix of sun and clouds. 35 km/h northeast ridgetop wind. Treeline temperature -15 °C. Possible temperature inversion forming in the alpine.

Tuesday
Mostly cloudy. 1 to 4 cm of snow. 40 km/h variable ridgetop wind. Treeline temperature -14 °C.

Wednesday
Mix of sun and clouds. 0 to 3 cm of snow. 35 km/h northeast ridgetop wind. Treeline temperature -13°C.


More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Be especially cautious as you transition into wind-affected terrain.
  • Use ridges or ribs to avoid areas of wind-loaded snow.
  • Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.

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.