Bulletin d’avalanche

Kananaskis

Mar 19 – 20, 2013Alberta Parks
Voir sur la carte
Archivé · expiré 14 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
Ouvrir la carte complète

Points saillants

Light snow on Wed will do little to change the danger rating, but 10 to 15cm of snow on Wed night with strong SW winds will push the avalanche hazard up. Natural avalanche activity continues. Check Facebook for a couple of photos.

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Significant cornice growth has occurred recently and several cornice failures have occurred in the past couple of days. These cornice failures are triggering avalanches on the underlying slopes.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4
    Several crust layers are found in the upper snowpack. These crusts reach as high as 3000m on S aspects and between 22-2400m on other aspects. Carefully evaluate the bond at these interfaces and be cautious during times of solar radiation.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–5
    Storm slabs averaging 40cm thick are present on all aspects in the Alpine and open areas at Treeline. In some cases the slabs sit on a crust layer. These slabs have produced a few recent large avalanches and are still sensitive to human triggering.

Confidence

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

Weather Forecast

Light flurries expected Wednesday with rising freezing levels and strong to extreme SW winds. A more vigorous precipitation event is possible Wednesday night.

Avalanche Summary

An isolated natural avalanche cycle continues, including cornice triggered slides. Observations today observed a few large avalanches in the alpine, primarily on solar aspects. Many of these slides have been running fairly far, and avalanches in shallow snowpack regions have stepped down to ground.

Snowpack Summary

3 to 5cm of new snow overnight. Moist snow on solar asp in the afternoon. Previous storm snow is settling rapidly. Storm slabs exist on all aspects in the alpine and open areas at treeline. Cornices have grown significantly. Several layers of crust exist in the upper snowpack, especially on solar aspects. These remain layers of concern during periods of warming and/or solar radiation.

Régions couvertes