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Avalanche Forecast

Archived

Apr 5th, 2024–Apr 6th, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
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, South Okanagan, Ymir, Crawford, Moyie, St. Mary, Kokanee, Retallack, Valhalla.

Wind slabs, formed by northerly winds, can be found on lee features in the alpine and may not bond well to a recently formed crust. Use caution as you transition into wind-affected areas.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported.

Isolated wind slabs may be possible to human-trigger. The most likely terrain is directly lee of high spots and ridge features.

Snowpack Summary

10 to 15 cm of new snow has accumulated and may become moist with rising freezing levels and periods of sun. This new snow sits over a surface crust on all aspects and elevations.

A persistent weak layer of facets sits on top of a second buried crust down 80 to 180 cm. This layer is unlikely to be human-triggered in areas where a thick crust above the weak layer is present.

Weather Summary

Friday Night

Mostly cloudy with isolated flurries, 1 to 2 cm of snow. 10 to 15 km/h east ridgetop wind. Treeline temperature -2° C.

Saturday

Cloudy with flurries, 5 to 10 cm. 15 to 20 km/h northwest ridgetop wind. Treeline temperature -2° C. Freezing level 2000 m.

Sunday

Partly cloudy with isolated flurries 1 to 2 cm, 10 to 15 km/h ridgetop wind. Treeline temperature 0° C. Freezing level 2000 m.

Monday

Mostly clear skies, 20 to 30 km/h southwest wind. Treeline temperature 0° C. Freezing level 2000 m.

Check out the Mountain Weather Forecast for additional weather information.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs may be poorly bonded to the underlying crust.
  • 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.