Bulletin d’avalanche

Jasper

Dec 20 – 21, 2024Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

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

Keep your overhead hazard to a minimum. Large avalanches running to ground in the alpine have been observed in Jasper as a result of the new snow and winds.

Problèmes avalancheux

  • Wind Slabs

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

    New snow and strong winds have created new wind slabs. Avoid wind loaded large unsupported terrain.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    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 along time and pose a low probability, high consequence situation if triggered.

Confidence

Moderate

Avalanche Summary

Several avalanches were observed along the Churchill Range on east faces in alpine up to size 2.5 and running to ground. Some of these avalanches were caused by falling cornices.

Snowpack Summary

15-20 cm of snow fell on Wednesday at the Parker Ridge Area. The 7mm Surface Hoar that formed last week is likely flattened by winds but assume it could be preserved under new snow in sheltered locations. The mid and lower snow pack has multiple layers of surface hoar in sheltered terrain, melt freeze crusts and facets.

Weather Summary

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -4 °C.

Ridge wind southwest: 15-35 km/h.

Freezing level: 1600 metres.

Saturday

Mainly cloudy with isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -4 °C, High -3 °C.

Ridge wind southwest: 10-30 km/h.

Freezing level: 1800 metres.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present in the snowpack.
  • Be careful as you transition into wind-affected terrain.
  • Small avalanches may cause climbers to fall or bury belayers and gear.

Régions couvertes