Bulletin d’avalanche

Banff Yoho Kootenay

Dec 4 – 5, 2013Parks Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

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

Storm snow amounts in the forecast area were approximately 10-20 cm and  much less than those further east. Cold temperatures should help to stabilize this recent storm.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Reverse loading has also created new slabs on southerly aspects.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    The October melt freeze crust and basal depth hoar are a concern and avalanches may step down to basal layers.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    there is still a chance for significant sluffing with the new storm snow. Be aware of loading on S aspects with northerly winds.

Weather Forecast

Cold and clear with light north winds through till end of week at least.

Snowpack Summary

10-15 cm of Storm Snow has fallen over last 48 hrs. Strong Northerly winds caused some reverse loading and fresh wind slabs with the arrival of the Arctic front. Steep gullies and large open start zones at and above treeline should be treated as suspect until this storm snow settles. Cold temperatures should promote a stabilizing trend.

Avalanche Summary

No new avalanches have been observed.

Confidence

Due to the quality of field observations

Régions couvertes