Bulletin d’avalanche

Jasper

Apr 11 – 12, 2025Avalanche Canada
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Archivé · expiré last year

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
Sans niveau
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Points saillants

Newly formed windslabs will remain sensitive to trigger going into the weekend. Be diligent in assessing exposure to overhead hazard before entering terrain.

Even with cooling temperatures in at upper elevations, spring conditions remain below treeline.

Problèmes avalancheux

  • Wind Slabs

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

    New windslabs are being formed from south winds and recent snow.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4

    Small avalanches have the potential to step down to this deeper problem layer, made up of buried weaker facets.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4

    This avalanche problem remains difficult to trigger, but will result in a large destructive avalanche if initiated.

Confidence

Moderate

Avalanche Summary

Large cornice failures and small windslabs have been observed at alpine elevations in the last 48 hours. Earlier this week a size 3 deep persistent slab avalanche was observed in the alpine on a N-NW aspect.

Snowpack Summary

Strong South winds and recent snow have formed new windslabs. The upper snowpack at treeline and below is a series of melt-freeze crusts and moist snow. The mid-pack and lower snowpack is dry, faceted and weak. The alpine and treeline snowpack on north aspects remains dry. Average treeline snow depth is around 100-150cm at the icefields area.

Weather Summary

Saturday

Mainly cloudy with scattered flurries.

Accumulation: 5 cm.

Alpine temperature: High -5 °C.

Ridge wind northwest: 15-30 km/h.

Freezing level: 1500 metres.

Sunday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -12 °C, High -5 °C.

Ridge wind west: 10-30 km/h.

Freezing level: 1600 metres.

Monday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -7 °C, High -1 °C.

Mostly light ridge wind occasionally gusting to 35 km/h.

Freezing level: 2200 metres.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Régions couvertes