Bulletin d’avalanche

Jasper

Jan 9 – 10, 2025Avalanche Canada
Voir sur la carte
Archivé · expiré 2 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Watch for fresh wind slabs. Rapid loading from wind could overload our weak and shallow snowpack.

Problèmes avalancheux

  • Wind Slabs

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

    Watchout for possible reverse loading from forecasted NW winds.

  • Deep Persistent Slabs

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

    A variety of crusts with facets above and below exist at the bottom of the snowpack. These layers are going to be with us for a long time and pose a low probability, high consequence situation if triggered.

Confidence

Moderate

Avalanche Summary

Natural windslabs avalanches have been observed around the icefields area to size 1 from east aspects in the alpine. Also, there have been several loose dry avalanches from steep rocky terrain across the region.

Snowpack Summary

Windslabs have formed from moderate, gusting strong W-SW winds. Currently, the snowpack is averaging 60-120cm in depth at the treeline. 10-30cm sits atop a weakening melt freeze curst and surface hoar layer from early December. The middle of the snowpack is facetted and there is a deep persistent layer at the base of the snowpack consisting of an decomposing melt freeze crust and depth hoar.

Weather Summary

Thursday

Cloudy with sunny periods.

Precipitation: Nil.

Alpine temperature: High -7 °C.

Ridge wind west: 15 km/h.

Freezing level at valley bottom.

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -11 °C, High -7 °C.

Ridge wind west: 20 km/h gusting to 45 km/h.

Freezing level at valley bottom.

Terrain and Travel Advice

  • Approach lee and cross-loaded slopes with caution.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.

Régions couvertes