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Avalanche Forecast

Archived

Dec 19th, 2025–Dec 20th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

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

A dusting of new snow may overlay wind slabs in the alpine and open treeline areas.

Assess the area you are in to see if the wind has made the snow more dense.

Confidence

Moderate

  • Uncertainty is due to how quickly the snowpack will recover and gain strength.

Avalanche Summary

Reports of a natural avalanche cycle up to size 2.5 on Monday and Tuesday consisting of storm slabs at upper elevations, with wet loose avalanches at lower elevations.

A few small (size 1) human triggered avalanches were reported on Tuesday, not running far or fast.

Snowpack Summary

up to 50 cm of snow is on the surface in sheltered areas and is wind affected in the alpine and open areas at treeline.

A crust is present at elevations lower than 1300 m and is buried 30cm deep.

A few layers of weak, feathery surface hoar crystals can be found between 50 to 150 cm deep.

Snowpack depths in excess of 300 cm can be found at treeline elevations.

Have a read of this MIN for details specific to the Shames area

Weather Summary

Friday Night
Mostly cloudy. 5 cm of snow. 10 km/h southeast ridgetop wind. Treeline temperature -12 °C.

Saturday
Mostly cloudy. 2 cm of snow. 10 km/h southwest ridgetop wind. Treeline temperature -12 °C.

Sunday
Mix of sun and clouds. 3 cm of snow. 30 km/h southeast ridgetop wind. Treeline temperature -12 °C.

Monday
Mix of sun and clouds. 3 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -16 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep in mind that human triggering may persist as natural avalanches taper off.
  • Make observations and continually assess conditions as you travel.

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.