Bulletin d’avalanche

Waterton Lakes

Dec 22 – 25, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

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

Points saillants

Sunday afternoon will bring an end to the storm, but continued overnight wind and snowfall will keep the hazard elevated until freezing levels descend and the snowpack has had time to adjust to the load.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3

    Recent Rain, snow and warm temperatures has begun to overload melt freeze crusts and facets from early season snowfalls causing large avalanches.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–2

    Continued snowfall accompanied by 120km/h southwest winds has formed touchy slabs

Weather Forecast

Weather models are conflicted on snowfall amounts for Saturday night with amounts between 8 to 20cm expected. Strong winds will continue overnight with a lull on Sunday where we may even see some sun. Freezing level is expected to remain around 1700m descending to valley bottom by Monday night.

Snowpack Summary

60cm+ of wet snow and rain in the Cameron Lake area has arrived with extreme northwest winds and a freezing level around 1900m, continuing to load the snowpack. A weak crust facet combo formed in November is down 60cm, and additional crust/facet layers formed in October form the bottom of the snowpack.

Avalanche Summary

A widespread natural cycle was observed on Saturday along the Red Rock and Akamina parkways, with avalanches to size 2 in the storm snow and some larger ones failing on deep persistent weak layers

Confidence

Forecast snowfall amounts are uncertain

Régions couvertes