Bulletin d’avalanche

Kananaskis

Feb 23 – 24, 2017Alberta Parks
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Archivé · expiré 10 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Localized flurries are gradually building the snowpack. Good skiing can be found in sheltered, moderate angle terrain. We're still not recommending big terrain because of the unpredictable nature of the basal layers.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    These slabs are now lightly buried under the new snow from the last few days. So far these have been an issue in steep convex terrain and below cliffs. Crossloaded areas at treeline also have the slabs, however these are a bit more stubborn.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    Triggering this layer is still a possibility in thin areas. Expect large propagations.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–4
    We are approaching the "low probability, high consequence" phase of the winter. Respect the potential for this layer to react to large triggers, or weak shallow areas.

Confidence

High -

Weather Forecast

Light winds overnight tonight with trace amounts of snow. Tomorrow  will see some light convective flurries, hopefully bringing 4cm of snow. Winds will stay light at all elevations and the daytime high will hit -14°.

Avalanche Summary

Some small loose dry avalanches were noted today. They did not travel far and did not trigger any slabs.

Snowpack Summary

Flurries have left us with 5-10cm of new snow on the Spray and as much as 15cm closer to the divide. This new snow is settling fast on solar aspects at all elevations. On steep solar aspects there is a buried suncrust (feb 17th) down 20-30cm. Beneath this snow, the upper pack remains well settled with denser slabs as the 50cm depth is reached. Immediately below this settled upper pack is the much weaker basal layers. This layer varies between 30-50cm and is a dog's breakfast of crusts, facets and depth hoar.

Régions couvertes