Bulletin d’avalanche

Kananaskis

Feb 22 – 23, 2013Alberta Parks
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Archivé · expiré 14 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

New snow and strong winds forecast to arrive overnight on Friday evening.  Watch for decreasing stability. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4
    Pockets of soft slab are present in lee and cross-loaded features in the alpine. These recent slabs sit on an old smooth layer of hard slab - this was the failure plane for an avalanche involvement on Thursday in the Hero's Knob area.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Numerous loose dry sluffs up to size 1 were observed on lee aspects throughout the day again on Friday due to wind action.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–4
    Fresh storm slabs are building in open wind affected terrain.  Be aware of these new slabs as you transition into open wind affected terrain. 

Confidence

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

Weather Forecast

The storm that was forecast to arrive on Friday afternoon has now been pushed back to Friday night.  We expect snow to begin falling around 19:00 and continue into the morning with total accumulations of 15-20cm.  Winds will be STRONG out of the SW so new slabs will be quick to develop.

Avalanche Summary

No new avalanches were observed but conditions were obscured throughout the day.  Likely there was loose dry sluffs up to sz 1 from steep unskiable terrain throughout the day.

Snowpack Summary

5cm new snow overnight in the core areas of the forecast area with strong westerly winds.  Touchy slabs building in Alpine terrain and in steep unsupported area at treeline.  Watch for pockets of unstable snow along ridge crests, along moraines, and in gullied terrain features, especially along lee aspects.

Régions couvertes