Bulletin d’avalanche

Jasper

Jan 1 – 2, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Cornices are becoming weaker with the current conditions - give them the respect they deserve by staying well back.  Enjoy the mid-winter sunshine and have a safe and Happy New Year!..

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Wind slabs can be found above treeline in exposed terrain. These slabs are generally unreactive to skier traffic, although it is still possible to trigger a slab in steep wind loaded features.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Numerous natural loose dry avalanches were observed in the past 48 hours. These slides originated from steep, rocky terrain in the alpine, as well as steep alpine gully features that are in the sun during the heat of the day.

Weather Forecast

Colder temps for Wednesday then a re-warming trend towards the end of the week. Clear skies, light westerly winds, and no precipitation for the rest of the week.  Winds moderate to strong at ridgetop from the North.

Snowpack Summary

Snowpack is faceting and losing strength in shallow areas. Midpack is still generally supportive above treeline, with wind slabs in lee features at upper elevations. New surface hoar is being observed on the surface and is quite widespread. Moderate Northerly winds at ridgetop elevation may be causing some reverse loading in exposed terrain.

Avalanche Summary

Near surface faceting and a sunny day produced numerous loose snow avalanches to size 1.5 in the Columbia Icefield Area yesterday. These slides originated from steep, shallow and rocky terrain in the alpine on solar aspects.  Cornice control yesterday at Marmot Basin did not trigger any slabs in slopes below.

Confidence

The weather pattern is stable

Régions couvertes