Bulletin d’avalanche

Kootenay Boundary

Mar 28 – 29, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

The avalanche danger trends upward with the appearance of the sun and afternoon warming. Danger is rated for the warmest part of the day.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5
    Recent 5-10 cm of new snow combined with moderate to strong southwest winds has created thin wind slabs in the lee of terrain features which might still be triggered by skiers.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5
    Expect to see crusts that formed from overnight cooling break down quickly if the sun comes out and the surface snow sluff in steep terrain.

Confidence

High - The weather pattern is stable

Weather Forecast

THURSDAY NIGHT: Mainly cloudy, light easterly wind, alpine temperature -3 C, freezing level 1700 mFRIDAY: Mix of sun and cloud, light northerly wind, alpine temperature -1 C, freezing level 2100 mSATURDAY: Mix of sun and cloud, light westerly wind, alpine temperature -1 C, freezing level 2200 mSUNDAY: Mainly cloudy, light southwest wind, alpine temperature -2 C, freezing level 2100 m

Avalanche Summary

On Tuesday and Wednesday there were reports of skier triggered thin wind slabs to size 1.5. On Wednesday loose wet avalanches to size 1 were observed in the afternoon on solar aspects.

Snowpack Summary

At upper elevations, up to 15 cm of recent new snow sits on a melt-freeze crust or moist snow. Some of this has been redistributed by southwesterly winds which may have formed isolated thin wind slabs. At lower elevations, expect to see a supportive crust on or near the surface if there is a good overnight freeze. This crust sits above a largely moist or wet snowpack.

Régions couvertes