Bulletin d’avalanche

Banff Yoho Kootenay

Mar 17 – 18, 2015Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Pockets of good skiing can be found in sheltered locations. Otherwise, ski conditions remain challenging.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    These wind slabs are becoming less sensitive, however human triggering is still possible. Likely this will come in the form of a hard wind slab rather than a soft one, if tested.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    The lower half of the snowpack is weak due to the presence of basal facets and depth hoar. This layer has been dormant lately but may be more sensitive with the new load, especially in thin areas.

Weather Forecast

Cloudy skies and minimal precipitation is forecasted for the next few days. Most of the precip will arrive Friday (~10mm equivalent). Temps at valley bottom will be hovering around zero degrees, cooler up high. Given the warmish temperatures and late time of year, any unexpected burst of solar energy will change conditions for the worse.

Snowpack Summary

Recent strong wind has created hard slabs on the snow surface in the alpine. Below this expect to find a mix of facets and crusts. As ghastly as that combination sounds, generally it is well bonded.

Avalanche Summary

A natural size avalanche size 1.5 was observed near the Balfour Hut today. The observer describes the avalanche as a hard windslab. It was noted at 2300m on a North aspect. No other avalanches were observed or reported.

Confidence

Régions couvertes