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Avalanche Forecast

Archived

Jan 11th, 2025–Jan 12th, 2025

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, Ymir, Crawford, Moyie, St. Mary.

Assess steep lines for wind slabs before committing.

Small rider triggerable slabs may still be found near ridge crests.

Confidence

Moderate

Avalanche Summary

No new slab avalanches have been reported in the region since Monday.

If you are headed into the backcountry please consider sharing your observations via the Mountain Information Network.

Snowpack Summary

Ongoing westerly wind has impacted the snowpack . Isolated wind slabs could exist on leeward aspects in the alpine and treeline.

The upper snowpack contains a variety of layers including one or more surface hoar layers just below the surface in sheltered terrain and a crust on or near the surface on solar aspects. Soft snow can still be found in sheltered terrain at treeline and below.

Down 50 to 120 cm a weak layer of surface hoar or a facet/crust combo from early December can be found. Snowpack tests indicate it is gaining strength.

The lower snowpack is generally strong and well-bonded.

Weather Summary

Saturday Night

Mix of cloud and clear sky with trace amounts of snow possible. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -12 °C.

Sunday

Mix of sun and cloud with trace amounts of snow possible. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -7 °C.

Monday

Mix of sun and cloud with trace amounts of snow possible. 30 to 50 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Tuesday

Sunny. 20 to 30 km/h west ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are isolated, but may remain reactive.
  • 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.