Bulletin d’avalanche

Kananaskis

Feb 17 – 18, 2013Alberta Parks
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Archivé · expiré 14 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

A welcome addition of up to 25cm's of new snow AND light winds with it. Lots of sluffing today on anything over 40 degrees. Caution with terrain traps at all elevations. Clear skies tomorrow may be a trigger for even more loose dry avalanches.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–5
    Wind slabs are present in lee and cross loaded features in the alpine and open areas at treeline. These slabs are 30 to 70cm thick and are reactive to skier traffic. Spatial variability is a key point with these slabs.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–3
    Lots of activity within the storm snow. Widespread sluffing with the occasional slab pulling out in steep unsupported slopes. Sizes were mostly 1-1.5.

Confidence

Good

Weather Forecast

We are on the tail end of the system that has brought us up to 25cm. The snow came with very little wind. Forecasted wind speeds are expected to remain light to moderate for Monday. Monday will start clear with increasing cloud throughout the day. No more precip until Tuesday. Temps will remain steady at -12 in the alpine.

Avalanche Summary

Numerous loose dry out of steep alpine terrain, all aspects. Isolated SSL out of steep unsupported  alpine terrain, up to SZ 2.

Snowpack Summary

10-20cm in the last 24hrs. Low density with little cohesion.  CTM (SP), down 25 on old windslab. E asp. The new snow is hiding a variety of old surfaces. The slabs that sit below the storm snow are variable in thickness and hardness.

Régions couvertes