Bulletin d’avalanche

Kootenay Boundary

Mar 8 – 9, 2026Avalanche Canada
Voir sur la carte
Archivé · expiré 7 months ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
Ouvrir la carte complète

Points saillants

Buried persistent weak layers continue to drive the hazard. Stick to conservative terrain and avoid slopes with overhead exposure.

Fresh wind slabs may be reactive at higher elevations.

Problèmes avalancheux

  • Wind Slabs

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

    Fresh and reactive wind slabs may continue to form. Small wind slabs may step down to deeper weak layers.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    Weak layers in the upper snowpack continue to be reactive and surprise riders with wide propagation. Recent large avalanches have involved the 3rd or 4th rider. Remote-triggering and large avalanches remain possible.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.
  • We are uncertain due to the variability of wind effect on the snowpack.

Avalanche Summary

On Saturday, small wind-affected pockets remained reactive to rider traffic.

A natural size 2.5 persistent slab occurred on a southeast-facing treeline slope during Saturday's warm temperatures. On Thursday, a snowcat remotely triggered a large persistent slab on an east-facing treeline slope. While reports of persistent slab activity are tapering, human-triggered avalanches are still expected.

Snowpack Summary

Strong west winds have likely formed wind slabs at treeline and above over a new surface hoar or crust layer. At lower elevations, rain has likely created a supportive surface crust.

In the top 100 cm of the snowpack, there are multiple persistent weak layers of surface hoar and/or facets/crusts. The majority of the recent large and destructive avalanches occurred on well-preserved surface hoar in sheltered areas at treeline and below.

The remaining snowpack has no current layers of concern.

Weather Summary

Sunday Night
Mostly clear skies. 1 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -7 °C.

Monday
Mostly cloudy. 1 to 2 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -10 °C.

Tuesday
Mix of sun and clouds. 1 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -10 °C.

Wednesday
Mostly cloudy. 5 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -9 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Régions couvertes