Bulletin d’avalanche

Banff Yoho Kootenay

Jan 15 – 16, 2015Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

A classic, weak Rockies snowpack exists and doesn't inspire much confidence. Enjoy the beautiful weather and let's hope for a little new snow to refresh the ski quality for Friday.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3
    This layer is more touchy in deeper snowpack areas where it is more deeply buried (30 - 50 cm down) and at lower elevations where it is a rain crust/ surface hoar combination.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    In shallower snowpack areas (most of the region) the weak base of the snowpack persists and can be triggered in steep, rocky terrain features. Patience is a virtue with this problem, as bigger terrain may not be available until later this winter.

Weather Forecast

A weak system will bring light snow starting Thurs PM. We should see 5-10 cm's by Friday night with a clearing trend for Saturday. With this system, we will also see strong alpine winds from the west. Temperatures will cool over the period but remain -5/-10 range at valley bottom.

Snowpack Summary

Wind slabs are present in many open areas above tree line. Below this, the snow pack is quite weak and facetted in most places. The Dec 18 crust/facet/surface hoar is facetting out but still a concern in deeper snowpack areas. The bottom half of the snow pack consists of facets and depth hoar with the early november crust facetting out.

Avalanche Summary

No new avalanche activity observed on a field trip to the Helen Shoulder area

Confidence

Intensity of incoming weather systems is uncertain on Thursday

Régions couvertes