Bulletin d’avalanche

Purcells

Dec 8 – 9, 2024Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

If triggered, wind slabs may slide on a crust buried at the base of the snowpack.

Watch for terrain traps, like creeks and trees, that could increase the consequence of an avalanche.

Problèmes avalancheux

  • Wind Slabs

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

    The new snow needs time to settle and bond. Avoid steep loaded pockets and avoid being under slopes that the wind is loading.

  • Deep Persistent Slabs

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

    Avalanches on weak faceted snow at the base of the snowpack are becoming less likely, but remain possible on steep, smooth slopes. This problem seems to be local to Invermere, but information is limited.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported, but small avalanches are expected to have occurred on Saturday with the new snow and wind.

Snowpack Summary

Around 10 cm of new snow sits on various layers including sun crusts, surface hoar in sheltered areas, and wind-affected snow.

In the Invermere area, weak faceted snow at the base of the snowpack has caused several small but notable deep persistent slab avalanches. It's unknown if this problem extends to the wider region, so far it hasn't.

Treeline snow depths are generally 50 to 70 cm, with deeper wind-loaded pockets in the alpine.

Weather Summary

Saturday Night

Partly cloudy with 5 to 10 cm of snow. 30 to 40 km/h west ridgetop wind. Treeline temperature -7 °C.

Sunday

A mix of sun and cloud. 20 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Monday

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

Tuesday

Sunny. 10 to 15 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded terrain features.
  • Be mindful that deep instabilities are still present in the snowpack.

Régions couvertes