Bulletin d’avalanche

Jasper

Mar 10 – 11, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Tue
Wed
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
    Likely
    Taille
    1–3
    Moderate to strong Westerly winds continue to form wind slabs below lee ridgelines  and terrain features through Sunday night.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    If the sun peaks out, loose avalanches with significant mass may occur. They are initiating out of steep West or South facing high elevation rocks or gullies.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    The storm slabs remain soft where the wind has not firmed them up. Soft slab conditions also exist on gully sidewalls and some large alpine slopes.

Weather Forecast

Monday will be mostly clouds and moderate Northwest winds with only light snow flurries.  A system will begin to enter the area from the South by Tuesday afternoon and may bring some significant snowfall by Wednesday afternoon. Temperatures will warm during the storm and be accompanied by moderate to strong Southwesterly winds.

Snowpack Summary

Wind slabs are developing below alpine lee ridge lines with steady moderate to strong Westerly winds.  In sheltered areas, the recent storm snow has settled and bonded well.  Expect a suncrust on southerly alpine and treeline aspects.

Avalanche Summary

One new size 2 slab on steep non- skiable rock slabs was seen on an easterly aspect. Of note were two previous size 3 avalanches on the same range that must have occurred earlier in the week directly following the storm. Saturday's heli bombing had good results on the settled pockets of storm slabs above the Maligne Road on the Medicine Slabs. 

Confidence

Intensity of incoming weather systems is uncertain on Wednesday

Régions couvertes