Bulletin d’avalanche

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Apr 11 – 12, 2025Avalanche Canada
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Archivé · expiré last year

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Forecasted snowfall amounts are highly variable, assess your local field conditions and if new snowfall accumulations exceed 20 cm bump your danger rating to CONSIDERABLE.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3

    Facets and/or surface hoar buried 40 to 80 cm deep are most prominent at upper elevations where no surface crust has formed. Surface instabilities or large triggers may step down to these deeper layers.

  • Storm Slabs

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

    Expect new wind slab formation on north aspect terrain, near and below ridge crests.

Confidence

Moderate

Avalanche Summary

A natural wet slab avalanche was reported in the seton area at 1500 m that was likely triggered over the last weekend. The avalanche pulled out all the snow to the ground. Check out the MIN report here.

If you do observe an avalanche, please share your observations on the Mountain Information Network.

Snowpack Summary

Up to 20 cm of new snow covers variably wind-affected snow in open terrain at upper elevations. A crust is found up to 2000 m and higher on solar slopes.

Below 1100 m the snowpack is wet and unconsolidated.

Two layers of concern currently exist in the upper-mid snowpack.

  • A layer of surface hoar that formed in early March can be found at a depth of 60 to 100 cm.

  • A layer of facets, surface hoar, and/or a crust from mid-February is buried 120 to 200 cm deep.

The remainder of the snowpack is well consolidated, and there are no current concerns.

Weather Summary

Friday Night

Cloudy with flurries. 40 to 60 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1000 m.

Saturday

Mix of sun and cloud with flurries. 10 to 30 km/h northwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1100 m.

Sunday

Cloudy with up to 10 cm snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -1°C. Freezing level 1100 m..

Monday

Cloudy with up to 10 cm snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -1°C. Freezing level 1100 m..

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.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Régions couvertes