Bulletin d’avalanche

Waterton Lakes

Dec 20 – 23, 2018Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

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

An additional 20-30cm of snow has fallen, and more is forecast for Thursday. Choose conservative terrain and evaluate the lower layers in the snowpack carefully.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    New windslabs have formed with 20-30cm of new snow along the divide. Continued snow and wind Thursday night will continue to build slabs.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5
    New snow has increase the load on deep weak layers. This loading is likely to continue on Thursday Night with continued snowfall, increasing the potential for human triggering.

Weather Forecast

Thursday: 15cm of snow along the divide with moderate to strong windsFriday: Mainly cloudy with scattered flurries and cooling temperatures down to -15 overnight. Winds moderate gusting strong.Saturday: Mainly cloudy with isolated flurries.

Snowpack Summary

The snowpack in Waterton is highly variable, but you can count on a weaker structure along the divide where another 20-30cm of recent storm snow on Tuesday has formed windslabs on lee slopes which are sitting on a weak snowpack consisting of old windslabs, facets and crusts.

Avalanche Summary

As of Wednesday morning, one size 2 skier accidental was reported on Monday running on the basal facets.

Confidence

Forecast snowfall amounts are uncertain on Thursday

Régions couvertes