Bulletin d’avalanche

Banff Yoho Kootenay

Mar 18 – 19, 2012Parks Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

It is getting harder to trigger an avalanche on the Valentines surface hoar, but the consequence of triggering one is huge. Areas West of the Divide have more bridging strength overall. Watch for triggering from thinner areas.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Isolated wind slabs up to 50cm thick can be still triggered in steeper terrain, especially around ridge crests.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3
    Down 70-120cm, the Valentines surface hoar is producing harder shears, and Field teams in Yoho, the Wapta, and Kootenay today had similar results. A size 3 triggered by seracs in the bow hut area remote triggered moraines on this layer yesterday.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    Numerous steep solar slopes were reported to slide today up to size 2.5 in the Emerald Lake area. Tomorrow we may see the same occurring. Failing cornices in the sun may provide a large trigger.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number and quality of field observations on Sunday

Régions couvertes