Bulletin d’avalanche

Kootenay Boundary

Apr 11 – 12, 2015Avalanche Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Spring flurries and wind may combine to build fresh wind slabs in lee features. Also, loose wet slides are possible whenever the sun pokes out.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    New snow may get blown into fresh wind slabs on the immediate lee of ridge lines and other terrain breaks.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Sunday: A mix of sun and cloud with a chance of flurries. The freezing level is around 1500-1700 m and ridge winds are moderate from the West. Monday: Cloudy with light snow or showers (~5 cm). The freezing level bumps up to 2000 m. Winds are moderate gusting strong from the S-SW. Tuesday: Showers or flurries ending early then cloudy with sunny breaks. The freezing level lowers to 1600 m and wind shift to northwesterly.

Avalanche Summary

Loose wet avalanches to size 1.5 have been reported in this region recently. Observations are becoming more limited as we enter into spring. If you're out in the mountains, please consider posting your observations to our webpage using the Mountain Information Network.

Snowpack Summary

Melt-freeze surface conditions exist on sun-exposed slopes. On shaded slopes, 10-20cm of recent snow overlies a thick supportive melt-freeze crust. At higher elevations these accumulations may have been blown around by variable winds and thin wind slabs may exist on a variety of aspects. The mid-March crust/facet complex is buried around 50cm below the surface. This layer is generally considered dormant, although it could be reactivated in isolated terrain by prolonged warm temperatures. The mid and lower snowpack are strong and well settled.

Régions couvertes