Bulletin d’avalanche

Jasper

Feb 12 – 13, 2015Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Warm temperatures below treeline will create isothermal conditions resulting in increasing possibility of loose snow avalanches.  These temperatures will also increase the hazard at treeline and above.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    The 1 meter of storm snow has transitioned into a persistent slab. This slab is sitting on a raincrust/surface hoar weakness.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    This layer remains a concern in isolated areas above treeline and may be triggered by large loads.

Weather Forecast

The freezing level will rise to 2000 m Thursday.  Light precipitation will continue with sunny breaks through to Saturday.  Forecast models are uncertain for the weekend but another large pulse of  precipitation is possible on Saturday.

Snowpack Summary

There is a wide variation in the snowpack across the forecast region.  In the Icefields Area, there is significant snow available for transport.  SW winds will be forming wind slabs below ridge lines and along gulley features. Up to 1 meter of storm slab is sitting over the Jan 29 rain crust on all aspects at treeline and above.

Avalanche Summary

Minor sluffing continues out of steep terrain.

Confidence

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

Régions couvertes