Bulletin d’avalanche

Jasper

Dec 19 – 20, 2025Avalanche Canada
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Archivé · expiré 9 months ago

Danger d’avalanche

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

Points saillants

Along the icefields parkway has seen large amounts of recent snow that has been redistributed by strong winds. Carefully evaluate all terrain for wind slab and overhead hazard.

Highway 93 will remain closed with further avalanche control planned for December 19th. Check 511 for updates.

Problèmes avalancheux

  • Wind Slabs

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

    Winds have been in the strong values and have considerably loaded lee features from a variety of directions. Local terrain influences and changing wind directions may load non-typical locations.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–3.5

    Weak interface where newer snow transitions to facet layers are now buried up to 100cm below the surface of the snowpack.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2.5

    Up to 30 cm of snow over the past 48h arrived with cooler temperatures and sits above the significant accumulation of Tuesday's storm.

Confidence

Avalanche Summary

Avalanche control from December 16th produced numerous size 1.5 to 2.5 wind slab and persistent slab avalanches. Natural avalanches up to size 4 have been reported along the closed section of highway 93N in the last 28 hours. Natural activity is expected to continue with snow and wind forecasted to continue.

Snowpack Summary

Continuous snow since Sunday has accumulated to up to 100cm in the Parker's area. Strong to extreme winds have significantly loaded lee features. The height of snow is up to 140-180 cm in wind protected areas for this zone. Snow depth is up to 100 cm in the Maligne area. Weaker facet layers are now buried deep within the snowpack.

Weather Summary

Friday

Cloudy with sunny periods and isolated flurries. Precipitation: Trace.Alpine temperature: High -11 °C. Ridge wind west: 25 km/h gusting to 65 km/h.

Saturday

Snow accumulating to 9 cm. Alpine temperature: Low -15 °C, High -11 °C. Ridge wind southwest: 20 km/h gusting to 65 km/h.

Sunday

Snow accumulating to 11 cm. Alpine temperature: Low -11 °C, High -8 °C. Ridge wind southwest: 15 km/h gusting to 50 km/h.

Terrain and Travel Advice

  • Avoid areas with overhead hazard.
  • Avoid freshly wind-loaded terrain features.
  • Don't let the desire for deep powder pull you into high consequence terrain.

Régions couvertes