Bulletin d’avalanche

Kootenay Boundary

Dec 15 – 16, 2014Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Danger ratings trending down due to low freezing levels after the recent rain.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Pockets of windslab may be lurking above the rain line from the last storm. They are especially sensitive to triggers and where overlying surface hoar and other persistent weakness form earlier in the month.

Confidence

Fair - Due to the number of field observations

Weather Forecast

A mix of sun and cloud with a slight possibility of light flurries for the forecast period. freezing levels will remain in valley bottoms with alpine temperatures reaching -5C. Alpine winds should remain light southerlies.

Avalanche Summary

There we no new reports of avalanches on Sunday or Monday morning.

Snowpack Summary

Surface hoar is growing on a thick hard supportive rain crust that extends as high as 2100 m. Sun-exposed slopes are undergoing daily surface melt-freeze cycles, while shady slopes have a skiff of dry snow on the crust. Critical slopes are high elevation north aspects where preserved facets or buried surface hoar from earlier in the month may be lurking under dense storm slabs, and a facet/crust combination near the base of the snowpack may be persisting. Recent snowpack tests gave easy sudden planer results on well preserved surface hoar in the Southern Purcells where it was found down 30 cm on high north aspects.

Régions couvertes