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Avalanche Forecast

Archived

Jan 10th, 2025–Jan 11th, 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

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

Keep an eye on changing conditions.

Small wind slabs have likely formed near ridge crests.

Confidence

Moderate

Avalanche Summary

There have been no new reports of avalanches since Monday when explosive avalanche control produced several storm slabs up to size 2. Notably, these avalanches did not step down to the December persistent weak layer.

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

Snowpack Summary

Throughout the day on Friday new wind slabs formed as a result of moderate southwest winds and light snowfall. In areas protected from the wind, expect surface hoar to be buried.

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.

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 slowly gaining strength.

The lower snowpack is generally strong and well-bonded.

Weather Summary

Friday Night

Cloudy with snowfall 5 to 10 cm. 40 to 80 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Saturday

Cloudy with around light snowfall 1 to 3 cm . 40 to 60 km/h northwest ridgetop wind. Treeline temperature -4 °C.

Sunday

Clearing throughout the day. 30 to 50 km/h northwest ridgetop wind. Treeline temperature -7 °C.

Monday

Mix of sun and cloud. 30 to 60 km/h northwest ridgetop wind. Treeline temperature -7 °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.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.

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.