Bulletin d’avalanche

Banff Yoho Kootenay

Jan 30 – 31, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

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

Step out slowly and purposefully. Avoid shallow faceted areas. Seek out deep snowpack areas.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5
    Soft wind slabs can likely be located in high elevation lee areas. Forecasters don't expect them to be more than 20cm thick.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The weak Oct.26 facets and depth hoar at the base of the snowpack have a significant slab (50-130cm thick) sitting above them. The likelihood of triggering this layer has decreased, but if it does get triggered, the avalanche will be large in size.

Weather Forecast

Warmer than seasonal temperatures will persist through until the end of the week. A weak system will bring snow to the region starting late Wednesday. By the end of Friday there could be up to 20cm in the alpine. The wind will potentially climb to the strong range from the West, the windiest period being late on Thursday.

Snowpack Summary

10-20cm of snow sits on top of isolated sun-crusts and surface hoar. Possible soft wind slabs in lee alpine areas. Of greatest concern are the weak facets and depth hoar at the base of the snowpack. Triggering a slab is more likely in thin snowpack areas.

Avalanche Summary

No avalanches observed or reported.

Confidence

Intensity of incoming weather systems is uncertain on Thursday

Régions couvertes