Bulletin d’avalanche

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Mar 11 – 12, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

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

Points saillants

Recent southerly winds have created fresh wind slabs in the alpine. As the temperature gradually warms over the next few days persistent slabs may become more reactive.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Light new snow and southerly winds are keeping wind slabs reactive in lee terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2.5

    A buried weak layer of facets and/or surface hoar buried mid-February is still capable of producing large avalanches.

Confidence

Moderate

Avalanche Summary

There has been little avalanche activity reported in the previous few days. If you do observe an avalanche, consider posting a MIN.

Snowpack Summary

Light new snow amounts are beginning to bury a widespread layer of surface hoar crystals, which sit over a crust on solar aspects and low elevations.

A layer of facets, surface hoar and/or a crust buried mid February, are 30 to 50 cm below the snow surface and has been reactive in snowpack tests.

Deeper in the snowpack, a weak layer of facets and a crust from early December can be found. This layer appears to be dormant but is still worth keeping in mind in thin snowpack areas in the alpine.

Weather Summary

Tuesday Night

Mostly clear. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Wednesday

Mostly cloudy with 1 to 2 cm of snow. 20 to 40 km/h east ridgetop wind. Treeline temperature -7 °C.

Thursday

Cloudy with isolated flurries. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Friday

Mix of sun and cloud. 10 to 20 km/h southwest wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Régions couvertes