Bulletin d’avalanche

Jasper

Apr 8 – 9, 2025Avalanche Canada
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Archivé · expiré last year

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
Sans niveau
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Points saillants

Start and end your day early, and stay flexible in your trip planning.

The cooling trend hasn't improved travel conditions below treeline.

Problèmes avalancheux

  • Wind Slabs

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

    Isolated windslabs on N asps where HST available for transport.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3

    Changing conditions (solar, new load) may result in cornice failure, acting as a large trigger on the slope below. Avoid overhead exposure containing overhanging cornices.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–3

    Small avalanches have the potential to step down to this deeper problem layer, made up of buried weaker facets below an crust formed earlier in the season.

    Still exists in the snowpack BTL; use caution on steep open slopes.

Confidence

High

Snowpack Summary

Moist snowpack treeline and below where spring temperatures are penetrating well into the snow on all but cold north aspects in the alpine and treeline. Near-surface crusts on solar aspects are unsupportive without a good overnight freeze. A 50-100 cm settled mid-pack rests on top of weak facets, depth hoar, and old crusts. Tree line snow depth is 80-130 cm.

Weather Summary

Overnight: Cloudy, isolated flurries. Low -6°C. Ridge wind SW: 20 km/h.

Wednesday: Cloudy with sunny periods and isolated flurries. High -3 °C. Ridge wind SW: 25 km/h. Freezing level: 1900 metres.

Thursday: Cloudy with sunny periods and isolated flurries. High 1 °C. Mostly light ridge winds with moderate gusts, freezing level: 2400 metres.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.

Régions couvertes