Bulletin d’avalanche

Jasper

Mar 5 – 6, 2016Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Expect slab development immediate to lee ridge lines and cross loaded features. Bonding should be suspect, progress cautiously into steeper terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    Persistent weak layers of decomposed surface hoar, facets, and depth hoar are in many locations. These layers have been stubborn to trigger underfoot but could be triggered by cornice failure or from shallow spot and release to ground.

Weather Forecast

Light scattered flurries throughout the weekend, amounting to 10cm by Sunday evening. Temperatures to remain cool above treeline, with good overnight recovery. Winds expected to be in the moderate range from the Southwest, gusting to strong. Freezing levels will creep up to 2100m during the heat of the day.

Snowpack Summary

New thin wind slab on lee and crossloaded terrain above 2000m. Persistent weak layer down 40-70cm remains a concern but has been dormant of late. Snowpack is facetted at lower elevations, making for difficult travel. Depth hoar is widespread and is a potential sliding layer with large triggers such as cornice fall or other avalanches.

Avalanche Summary

Several reports of remotely triggered slab avalanches in the alpine in wind loaded areas up to size 2 over the past 72 hours. These slides went on old snow and are especially prevalent in areas that have not seen skier traffic this winter.

Confidence

Régions couvertes