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Avalanche Forecast

Archived

Dec 23rd, 2023–Dec 24th, 2023

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, South Okanagan, Ymir, Crawford, Moyie, St. Mary, Kokanee, Retallack, Valhalla.

10-15 cm of new snow and moderate west wind have formed fresh wind slabs on lee features.

Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Confidence

High

Avalanche Summary

No new avalanches were reported on Friday.

Data in this region is limited. Please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

10-15 cm of new snow on Saturday and moderate west wind have formed fresh wind slabs on lee features at treeline and above.

The recent snow is sitting on a hard crust. Below this crust, a weak layer of surface hoar may exist in some areas.

A second crust layer is down 40-60 cm.

Average snowpack depths at treeline are 70-110 cm. Snow depth tapers rapidly below treeline.

Weather Summary

Saturday Night

Clear skies, west alpine wind 10 to 20 km/h, treeline temperature -10 °C.

Sunday

Sunny skies, south alpine wind 25 to 35 km/h, treeline temperature -7 °C.

Monday

Mix of sun and cloud, southwest alpine wind 25 to 35 km/h, treeline temperature -6 °C.

Tuesday

Mostly cloudy, southwest alpine wind 30 to 40 km/h, treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid slopes that sound hollow or drum-like.
  • Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.

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.