Bulletin d’avalanche

Kootenay Boundary

Dec 25 – 26, 2012Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–5
    Blowing winds from variable directions has redistributed recent storm snow on most aspects. Use extra caution on lee slopes, behind spines, and in wind exposed areas. Reverse loading may catch you by surprise on unsuspecting slopes.

Confidence

Good

Weather Forecast

A Pacific frontal system is expected to bring light snow accumulations starting later tonight into Wednesday. The weather pattern for the rest of the forecast period looks to be fairly benign.Wednesday: Snow amounts near 5 cm, with ridgetop winds 30 km/hr from the SW and alpine temperatures near -9.Thursday: Light flurries with ridgetop winds blowing light from the West and alpine temperatures near -10.Friday: Cloudy with few sunny breaks, ridgetop winds light from the West and alpine temperatures near -12.

Avalanche Summary

One size natural size 2.0 avalanche occurred from an East aspect at 1900 m from Record Mt. Explosive avalanche control initiated several size 1.0-1.5 loose snow avalanches from N-NW aspects.

Snowpack Summary

Around 110 cm new snow has fallen over the past week. The recent storm snow seems to be settling with moderate to hard resistant shears in the top meter of the snowpack.  In areas of wind effect, expect the storm slab to be stiffer, easy to trigger and more reactive. In sheltered places the slab is still relatively unconsolidated and soft and may not propagate far. In some areas through the region, people continue to monitor the late November buried surface hoar found down around 130 cm. Test results are in the hard to very hard range with sudden results. This layer may be difficult to trigger, but you can expect a consequential avalanche to occur if this layer fails. Deeper in the snowpack sits a well settled mid-pack.

Régions couvertes