Bulletin d’avalanche

Kootenay Boundary

Dec 9, 2017Avalanche Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

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

Warm alpine air is the continuing trend. Be cautious on steep slopes if the snow feels moist or wet.

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Warm air temperatures and clear skies have produced spring-like conditions on steep solar aspects. Loose wet avalanches may begin small but could step down to deeper crust layers.

Confidence

High - The weather pattern is stable

Weather Forecast

SATURDAY: Sunny with cloudy periods and valley clouds, light westerly winds, freezing level around 3400 m with below-freezing temperatures in the valleys.SUNDAY: Partly cloudy and valley clouds, light westerly winds, freezing level around 3000 m with below-freezing temperatures in the valleys.MONDAY: Mostly sunny and valley clouds, light westerly winds, freezing level around 3400 m with below-freezing temperatures in the valleys.

Avalanche Summary

Small loose wet avalanches were observed on steep south-facing slopes on Thursday.

Snowpack Summary

Warm air temperatures and clear skies have caused melting of the surface snow on south-facing slopes. Crusts may form overnight but should melt quickly in the mornings. The warm weather has settled the snowpack and may be improving the bond to the 30-50 cm deep rain crust from late November, but there are still limited observations of this layer. Lingering wind slabs may exist at higher elevations but are trending towards being unreactive. Cornices may be weakening with the warm air temperatures.

Régions couvertes