Bulletin d’avalanche

Jasper

Dec 12 – 13, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

Loading happening at all elevations and aspects. Remain cautious as you travel in the back-country. Great riding can be found throughout the region.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–2.5

    New snow and moderate to strong SW winds building new windslab in lee and crossloaded features. Watch for hollow sounds and cracking. Consider testing smaller slopes before committing to larger features; windslabs could initiate deep layers.

  • Loose Dry

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

    Heavy down flow observed in the Wilson region. Ice Climbers, avoid all overhead exposure.

  • Storm Slabs

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

    Most concerning BTL is at the transitions into open areas around Parkers Ridge, Sunwapta Pass. In the Maligne valley, the hazard will build with more snowfall over the week.

Weather Forecast

Overnight Saturday: Flurries. Accumulation: 7 cm. Alpine temperature: Low -15 °C. Ridge wind southwest: 20 km/h gusting to 55 km/h.

Sunday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: High -14 °C. Ridge wind southwest: 15 km/h gusting to 45 km/h.

Snowpack Summary

Parkway seeing between 10cm, and up to 20cm HST redistributed by mod SW winds at ridge top. Incremental loading at TL and BTL will create widespread variable soft slab. This will remain an active hazard and is most concerning as you transition into steep open areas, areas often paired with terrain traps. 

Avalanche Summary

Heavy snowfall and limited visibility reported by forecasting team in the Icefields today.

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Confidence

Régions couvertes