Bulletin d’avalanche

Lizard-Flathead

Feb 20, 2017Avalanche Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Give the new snow time to settle and stabilize before stepping into bigger terrain.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    New snow is forming reactive storm slabs that will be thicker and more reactive in wind affected terrain.

Confidence

Moderate - Wind speed and direction is uncertain

Weather Forecast

SUNDAY NIGHT: Isolated flurries with accumulations up to 5 cm, moderate southwest winds, freezing level dropping to 700 m.MONDAY: Isolated flurries with another 5 cm, moderate southwest winds, freezing level up to 1400 m.TUESDAY: Flurries with 5-15 cm of new snow, strong southwest winds, freezing level up to 1600 m.WENESDAY: Isolated flurries, moderate southwest winds, cooling trend with alpine temperatures around -6 C.

Avalanche Summary

On Sunday, reactive storm slabs produced a few size 1.5 naturally triggered avalanches in alpine terrain, several size 1.5 skier triggered avalanches at treeline, and numerous size 2-2.5 explosive triggered avalanches in alpine terrain. Small loose wet avalanches were reported at lower elevations as well. On Monday, storm slabs will likely remain reactive to human triggers at higher elevations.

Snowpack Summary

Light flurries will add to 20 cm of recent snow that is settling into a thin but reactive storm slab. This slab sits above a thick rain crust below 1900 m and a generally well settled snowpack. Isolated basal weaknesses may still exist in shallow snowpack areas.

Régions couvertes