Bulletin d’avalanche

Waterton Lakes

Mar 2 – 5, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

High freezing levels have heightened avalanche hazard terrain at all elevations.  Avoid traveling in avalanche terrain until things cool down.  Things should improve with the cooling trend and new snow forecast for Sunday.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    The warm, mild conditions with additional precipitation have increased the likelyhood of cornices failures and wind slab avalanches. These should start to stabilize with cooler temperatures on Sunday but should still be treated with caution.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Loose wet avalanches or moist storm slabs in steep terrain are likely over the next 36hours.  Until things cool down travel in avalanche terrain is not recommended.  Things should improve quickly with the cool temperatures forecast for Sunday.

Weather Forecast

Continued Chinook conditions with warm temperatures with light precipitation are forecast for Saturday.  Sunday morning winds ease off and switch to the North, temperatures should drop considerably to more seasonal values and we may see moderate accumulations of snow before a clearing trend on Monday.

Snowpack Summary

Moist surface snow below 1900m on all aspects and up to 2100m on solar aspects. Wind slabs present near ridge crests and open areas above tree line. In deep snow areas there are no other persistent weak layers. In thin snow areas facets are present in the snow pack which could be activated by the warm wet weather we are experiencing.

Avalanche Summary

Loose wet slides up to size 1.5 out of steep terrain below tree line were observed today.  As things continue to warm up over the next 36hours we may see more avalanches as the combination of wind, warm temperatures and new snow and/or rain, over load cornices, wind slabs and surface snow.  As temperatures drop the hazard will also lower.

Confidence

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

Régions couvertes