Bulletin d’avalanche

Banff Yoho Kootenay

Mar 4 – 5, 2012Parks Canada
Voir sur la carte
Archivé · expiré 15 years ago

Danger d’avalanche

Sun
Mon
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
Ouvrir la carte complète

Points saillants

Snowfalls and strong winds on the Divide are forecasted to continue for the 24 hours. Widespread natural activity is expected in those areas. This is a good time to pull back the reins until conditions improve.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Moderate winds this week have also created thin, but stiffer wind slab conditions 25-35 cm deep on ridgetop lee terrain. These have been seen to step down to the Valentine layer and are now buried by further snowfalls.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    2–3
    Snow depths over the Valentines surface hoar and sun crust on steep solar aspects range from 20cm E of the Divide, to 50+cm at Sunshine and Yoho. Continuing snowfalls and strog winds will increase natural activity on this layer.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Recent trips east of the Divide have found a shallow, weak snowpack. Tests done showed sudden collapse results on the basal facets. It is still possible to trigger the entire slope from shallow, thinly covered areas.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Régions couvertes