Bulletin d’avalanche

Kootenay Boundary

Mar 27 – 28, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

The avalanche danger trends upward with the appearance of the sun and afternoon warming. The 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
    5-10 cm of new snow combined with moderate to strong southwest winds has created thin wind slabs in the lee of terrain features.

  • 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

WEDNESDAY Night: Mainly cloudy with isolated flurries, accumulation up to 5 cm / moderate east wind / alpine temperature -6 C / freezing level 1000 mTHURSDAY: Cloudy with sunny periods / light southeast wind / alpine temperature -2 C / freezing level 1700 mFRIDAY: Mix of sun and cloud / light to moderate north wind / alpine temperature -1 C / freezing level 2000 mSATURDAY: Mainly cloudy with isolated flurries / light southwest wind / alpine temperature 3 C / freezing level 2100 m

Avalanche Summary

On Tuesday and Wednesday there were reports of skier triggered thin wind slabs to size 1.

Snowpack Summary

At upper elevations, up to 10 cm of 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.There are two crusts of note in the upper snowpack. The first crust is down 20 to 30 cm and loose wet avalanches have recently slid on this interface. The deeper one down 60 to 95 cm has produced easy shears in test profiles. Avalanches on this interface are unlikely, but possible.

Régions couvertes