Bulletin d’avalanche

Banff Yoho Kootenay

Jan 10 – 11, 2015Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

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

Points saillants

The last storm has deposited 15-20 cm's of snow on the Dec 18th interface which is slowly becoming a stiffer slab, be cautious at treeline and in the alpine.  This layer and the basal facets remain persistent issues with our snowpack in the Rockies.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3

Weather Forecast

The weather outlook for the weekend is very light precipitation and rising freezing levels on Saturday evening and then temperatures cool off on Sunday and into next week.  The predominant pattern will be high pressure with little precipitation forecast until next weekend at the earliest.

Snowpack Summary

Windslabs on facets and crust can be found on most exposed solar aspects. Pay particular attention to lee slabs on north and east aspects near ridge top features, the winds from last night have created a measurable amount of tension in these slabs which if initiated, have the capacity to step into the deeper basal facets creating large avalanches.

Avalanche Summary

Avalanche control a few days ago produced a few large avalanches and some continued natural activity yesterday. Today's activity near Lake Louise included avalanches in the size 2 to size 3 range.  These avalanches are being initiated at the Dec 18th interface and in steep, large scale terrain features are stepping down to ground.

Confidence

Due to the number and quality of field observations on Saturday

Régions couvertes