Bulletin d’avalanche

Waterton Lakes

Feb 25 – 28, 2020Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré

Points saillants

10-20cm of recent storm snow has fallen on a variety of surfaces, and slabs will become increasingly reactive with sun and strong winds on Tuesday.

Problèmes avalancheux

  • Storm Slabs

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

    15-25cm of new snow paired with increasing  SW-NW winds and through the forecast period will create reactive slabs in the alpine and treeline, especially in lee areas.

Weather Forecast

Tuesday: Sun and cloud with isolated flurries, and moderate SW ridgetop winds. Alpine high -9 with an inversion settling in overnight.

Wednesday: Similar to Tuesday with strong NW winds at ridgetop

Thursday: Mainly cloudy with flurries, continued strong NW winds and a high of -7.

Snowpack Summary

10-20cm of low density new snow sits on a variety of wind affected surfaces including previous windslab, suncrusts and the February 1 melt freeze crust, which exists up to approx 2100m. As winds increase this new snow will be blown into windslabs in lee areas. The midpack is strong, though weaker basal facets can be found in thin areas.

Avalanche Summary

Neighbouring operations reported skier triggered avalanches to size 1 in the new storm snow on Sunday.

Confidence

Régions couvertes