Bulletin d’avalanche

Kootenay Boundary

Mar 6 – 7, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué

Points saillants

⚠️Dangerous avalanche conditions⚠️

Stick to low-angle terrain and be mindful of overhead hazard. Human-triggered and remote-triggered avalanches remain likely.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2.5–3

    Buried weak layers remain sensitive to human triggering and could result in very large avalanches. It is possible to trigger these layers remotely and avalanches have the potential to run full path, so watch your overhead exposure.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Recent snow accumulation has formed touchy slabs, especially in wind-exposed terrain. These slabs remain reactive to human triggering and have the potential to travel full path.

Confidence

Moderate

Avalanche Summary

Natural, human, and remotely triggered avalanches have been reported throughout the region daily since early last week (many size 2 to 3 and some size 3.5). These avalanches failed on layers in the recent storm snow, the mid-February weak layer, and the early-February facet/crust layer.

This MIN report details a scary avalanche incident from Sunday west of Cranbrook that has similarities to numerous recent reports throughout the province.

Snowpack Summary

Low density storm snow is gradually settling. A prominent crust is found 100 to 150 cm below the surface, with several potential weak layers above it including facets, surface hoar and thin decomposing crusts. These layers continue to produce concerning avalanches across the region. The snow below the crust is generally strong and bonded.

Weather Summary

Tuesday Night

Clear skies. 15 km/h northwest ridgetop wind. Treeline temperature -15 °C.

Wednesday

Sunny. 10 km/h west ridgetop wind. Treeline temperature -8 °C.

Thursday

Sunny. 15 km/h west ridgetop wind. Treeline temperature -6 °C.

Friday

Mix of sun and cloud. 25 km/h southwest ridgetop wind. Treeline temperature -6°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use conservative route selection. Choose simple, low-angle, well-supported terrain with no overhead hazard.
  • Keep in mind that human triggering potential persists as natural avalanching tapers off.
  • Remote triggering is a concern, watch out for adjacent and overhead slopes.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

Régions couvertes