Bulletin d’avalanche

Microwave-Sinclair

Mar 10 – 11, 2026Avalanche Canada
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Archivé · expiré 7 months ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Wind slabs remain possible to human trigger.

Continually assess as you travel. If the snow looks wind-affected or feels dense or stiff, back off.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5

    Dry snow at upper elevations is being redistributed by moderate to strong winds. New wind slabs are likely developing over a previous surfaces of old wind slab, hard wind pressed snow and/or a crust.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5

    A buried layer of facets in the snowpack is expected to be more reactive in wind-affected thin rocky terrain features. Triggering of this layer is less likely where a supportive crust is present.

Confidence

Avalanche Summary

No new avalanches have been reported.

Numerous size 2 to 2.5 wind slab avalanches occured over the weekend.

Going forward, wind slab avalanches are still possible to human trigger.

Snowpack Summary

Roughly 15 to 30 cm of recent storm snow is wind affected at upper elevations and remains soft in sheltered terrain. This overlies heavily wind affected surfaces of hard wind slab, and wind pressed snow.

Below this, a layer of facets from early February and a thick crust from late January are at a similar depth between 70 and 110 cm deep. These layers are less likely to be triggered where a supportive crust is present.

This MIN from the Sinclair area on Monday describes soft snow with limited crust felt.

Weather Summary

Tuesday Night
Partly cloudy. 1 to 4 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -9 °C.

Wednesday
Mix of sun and clouds. 1 to 2 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Thursday
Mostly sunny. 1 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -9 °C.

Friday
Mostly sunny. 20 km/h west ridgetop wind. Treeline temperature -9 °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.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Régions couvertes