Bulletin d’avalanche

South Rockies

Dec 6 – 7, 2012Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
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
    1–4
    Recent light to locally heavy snowfall and strong winds have created new wind slabs. With high wind values, loading may have taken place lower on the slope than normal.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–5
    We have not heard of any new releases on this early season rain crust; however, an avalanche at this interface could be surprisingly large and destructive.

Confidence

Poor - Due to variable snowpack conditions

Weather Forecast

Overnight and Friday: Light snowfall / moderate northwest winds / Freezing level at surfaceSaturday: No precipitation / Light northwest winds / Freezing level at surfaceSunday: Light snowfall / Light southwest winds / Freezing level at surface

Avalanche Summary

No recent avalanche observations.

Snowpack Summary

Recent storm accumulations have been highly variable throughout the region; however, some ares saw moderate to heavy snowfall a few days ago. In general winds have been strong creating widespread windslabs at higher elevations. Warmer temperatures and rain at lower elevations have created moist surfaces that will most likely form a temperature crust with dropping freezing levels. Cornices are also reported to be unseasonably large and potentially unstable.There have been reports of buried surface hoar up to a metre down. This layer, which was buried about a week ago, seems most prevalent on the west side of the region. Little is known about its current reactivity.At the base of the snowpack you may find the early November crust which is associated with a layer of facets either directly above or below.In general, snowpack data is sparse in this region and significant variations likely exist from one drainage to another. Digging down and making your own observations will be critical to safe slope selection. Any observations from the field are welcome at [email protected].

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