Bulletin d’avalanche

Jasper

Apr 7 – 8, 2025Avalanche Canada
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Archivé · expiré last year

Danger d’avalanche

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

Start and end your day early. A cooling trend should improve the travel condtions.

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.

Confidence

Moderate

Avalanche Summary

Size 2 and 3 avalanches have been observed consistently through the spring transition. Avalanches are being triggered by cornice failures, sun, and/or loose wet slides that trigger deeper layers.

Snowpack Summary

Moist snowpack treeline and below where spring temperatures are penetrating well into the snowpack on all but north aspects in the alpine and treeline. Near-surface crusts on solar aspects are unsupportive and may have small, preserved surface hoar. A 50-100 cm settled mid-pack rests on top of weak facets, depth hoar, and weak old crusts. Tree line snow depth is 100-150 cm.

Weather Summary

Overnight: Isolated flurries. Low -3 °C. Ridge wind SW: 15-30 km/h.

Tuesday: Cloudy with sunny periods and isolated flurries. High -3 °C. Ridge wind W: 15-35 km/h. Freezing level: 1800 metres.

Wednesday: Cloudy with sunny periods and isolated flurries. Low -5 °C, High -4 °C. Ridge wind SW: 15-25 km/h. Freezing level: 1900 metres.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.

Régions couvertes