Bulletin d’avalanche

Jasper

Jan 10 – 11, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Be cautious as you transition into wind-affected terrain. Recent winds have redistributed available snow into wind slabs.

Problèmes avalancheux

  • Wind Slabs

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

    Watchout for reverse loading from NW winds as well as recent SW and W 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 on 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 NW-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 a decomposing melt freeze crust and depth hoar.

Weather Summary

Friday

Cloudy with sunny periods and isolated flurries (trace amounts). Alpine temperature High of -6 °C. Ridge wind from the west, 15 km/h gusting to 45 km/h. Freezing level at valley bottom.

Saturday

A mix of sun and cloud. Alpine Low -9 °C, and High -8 °C. Mostly light ridge wind occasionally gusting to 40 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