Bulletin d’avalanche

Banff Yoho Kootenay

Dec 30 – 31, 2018Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Mon
Tue
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
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Points saillants

An avalanche cycle is expected from this weekend's storm. Avalanches are expected to be touchy for a while. Avoid avalanche terrain.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely
    Taille
    1–2.5

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3
    This problem dominates the central and eastern part of the forecast region and will continue to do so for some time. Natural activity on this layer has decreased but human triggered avalanches on this layer are still possible.

Weather Forecast

The storm should taper by Sunday but some residual avalanche activity is expected. Cooler incoming air is expected to squeeze the last humidity out of the air giving us light flurries on Sunday. Colder conditions on Monday.

Snowpack Summary

The majority of the BYK region is a 40-60cm slab of stiff snow or new windslab overlying 40cm of weak facets and depth hoar. This nasty combination continues to produce whumphing and easy test results. Deeper snowpack areas are stronger, but have a 60-80cm slab over top of the Dec10 surface hoar/facet layer.

Avalanche Summary

Several avalanches were noted on Friday but their extent and size was obscured.

Confidence

Régions couvertes