Bulletin d’avalanche

Jasper

Feb 10 – 11, 2017Parks Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

Fri
Sat
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Avalanche Control along the Icefields Parkway is planned for Friday 1100 - 1700, expect delays.Strong winds and 20cm+ of snow have created dangerous avalanche conditions.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–3
    Moderate SW winds building windslab with recent storm snow and expected to bond poorly.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The Jan 17 interface or deeper layers might be woken up with the forecasted heavy snowfall and would result in large avalanches.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Forecasted storm snow (~30cm) will fall over a poorly bonded, weak snow pack. Small sluffs have potential to entrain a lot of mass and grow in size quickly.

Weather Forecast

12cm of storm snow has fallen today with another 20cm forecasted by the end of Friday. Winds will be moderate from the SW, gusting to strong. Alpine temps to reach a high of -8.

Snowpack Summary

Light to moderate SW winds are building soft slab at treeline and above. The upper pack has several surface hoar and facet layers which will be layers of concern with the incoming storm. The mid-pack is facetted and weak, with depth hoar at its base.

Avalanche Summary

No road patrol today. Snowfall amounts adding up throughout the day.

Confidence

Intensity of incoming weather systems is uncertain on Friday

Régions couvertes