Bulletin d’avalanche

Kananaskis

Mar 19 – 20, 2014Alberta Parks
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Archivé · expiré 13 years ago

Danger d’avalanche

Fri
Sat
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Heavy snowfall warning for the region could bring 20cm with NW winds by the end of Thursday. A very conservative approach to terrain is strongly recommended over the next couple of days.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–4
    Snow and wind on Thursday will add to already existing wind slabs in Alpine and Treeline areas. Avalanche activity related to this problem was observed Wednesday, and more slides are expected on Thusday. Reverse wind loading is also possible.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    3–5
    This persistent weak layer is buried 70 to 110cm in Alpine and Treeline areas and is sensitive to human triggering. The additional snow load on Thursday will make this layer more reactive and could trigger a natural avalanche cycle.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Watch for sluffing in steep terrain on all aspects at all elevations.

Confidence

Fair - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Snowy conditions are expected Thursday with as much as 20cm of new snow in the next 24hrs. Winds will become moderate from the NW with alpine temperatures climbing to -9 degrees. A further 5 to 10cm is possible on Friday.

Avalanche Summary

A few new naturally triggered slabs were observed today in steep Alpine and Treeline terrain. These slabs occurred on E and SE aspects and were of variable depth. Sizes ranged from 1.5 to 2.0 with one of the slides running to 3/4 fan.

Snowpack Summary

Recent storm snow is settling. Sun crusts are found on steep solar aspects at all elevations. Wind slab development continues in the Alpine and Treeline with persistent Westerly winds. The Feb 10th layer remains reactive and is buried between 80 and 110cm.

Régions couvertes