Bulletin d’avalanche

Kootenay Boundary

Mar 29 – 30, 2017Avalanche Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

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

Forecast warm weather and potential sunny periods on Thursday and Friday will keep the avalanche danger elevated

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Recent snow accumulations and wind have developed reactive storm slabs in the alpine and at tree line.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Warm spring days with high daytime freezing levels and potential sun may continue to result in loose wet avalanches on all aspects.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain

Weather Forecast

THURSDAY: Cloudy with sunny periods / Light north wind / Alpine temperature -4 / Freezing level 1500mFRIDAY: Mix of sun and cloud / Light west wind / Alpine temperature -3 / Freezing level 1600mSATURDAY: Cloudy with sunny periods and isolated flurries / Light to moderate southwest wind / Alpine temperature -1 / Freezing level 1700m

Avalanche Summary

On Wednesday there were reports of both natural and explosives controlled storm slab avalanches 20-40cm deep to size 2 on southerly and northwest aspects at tree line. There were also reports of skier controlled avalanches at tree line to size 1.5 on east an north aspects.

Snowpack Summary

Unsettled weather over the past week has brought roughly 50-80 cm of snow to the region. Periodic high freezing levels and solar exposure over the same period formed a variety crusts within the storm snow at both lower elevations and on solar aspects. This all overlies a rain crust that formed mid-March at all elevations. At upper elevations, above 2100m approximately, the late and mid-February persistent weak layers (100-150cm down) and basal facets in shallow snowpack areas may still exist.

Régions couvertes