Bulletin d’avalanche

Kananaskis

Dec 30 – 31, 2013Alberta Parks
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Archivé · expiré 13 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible
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Points saillants

Forecasters have very little confidence in the snowpack due to the persistent basal weakness of facets and depth hoar. This winter is much different than last season. Conservative route selection is a must.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–3
    Wind slabs are found in open areas at Treeline and in the Alpine. These slabs will react differently to human-triggering, depending on what lies beneath them.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–4
    Avalanches could step down to the October layer and involve the entire winters snowpack, especially in shallow snowpack areas. In some areas a dense wind slab overlies this deeply buried weak layer. Large and destructive avalanches are possible.

Confidence

Good

Weather Forecast

Cloudy conditions will continue for the next day or two with light snow accumulations of up to 5cm. Winds remain in the strong to extreme range from the West. Alpine temperatures will be near -8 degrees on Tuesday.

Avalanche Summary

Several loose dry avalanches up to size 1.5 were observed today on steep North and East aspects in the Alpine.

Snowpack Summary

Recent HST has been redistributed to lee and cross-loaded features due to extreme West winds. Wind slabs are now prevalent in Alpine and open areas at treeline. The weak basal facets and depth hoar remain a major concern in the snowpack as this weak layer now has significant slabs overlying it.

Régions couvertes