Bulletin d’avalanche

Jasper

Jan 30 – 31, 2025Avalanche Canada
Voir sur la carte
Archivé · expiré 2 years ago

Danger d’avalanche

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

Points saillants

Extreme wind speeds from the west are creating new wind slabs and difficult skiing conditions.

Problèmes avalancheux

  • Wind Slabs

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

    Extreme wind speeds may have formed windslabs lower in the terrain than is typical.

  • 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

Several natural wind slab avalanches to size 2 as well as smaller loose dry avalanches were observed in the Icefields area on January 29th.

Snowpack Summary

A variety of surface conditions exist depending on location, including melt freeze crusts, sun crusts, hard wind slabs, and soft faceted snow. These overlie a generally weak and faceted mid-pack. At the bottom of the snowpack are the early season crusts, which are faceting and surrounded by large depth hoar. The snowpack is 70-130 cm in depth at tree line, and thins quickly below.

Weather Summary

Thursday

Mainly cloudy with isolated flurries.

Precipitation: Trace.

Alpine temperature: High -9 °C.

Ridge wind southwest: 15-30 km/h.

Freezing level at valley bottom.

Friday

Cloudy with scattered flurries.

Accumulation: 5 cm.

Alpine temperature: Low -10 °C, High -7 °C.

Ridge wind southwest: 15-35 km/h.

Freezing level at valley bottom.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present in the snowpack.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Régions couvertes