Bulletin d’avalanche

Jasper

Jan 26 – 27, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Rising freezing levels and wet flurries on the weekend will increase the hazard. Not expecting this to be a widespread issue through the region but you need to stay aware to changing conditions locally, especially over head!

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2.5
    Moderate to strong winds have created new windslabs over a mix of surface conditions (facets, surface hoar, crust).

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Pay attention to sluffing off cliffs and steep solar terrain, signs of a warming snowpack

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Use caution in shallow uneven snowpack areas where deep weakness would be more reactive to a human trigger. An avalanche of this nature would be large with severe consequences.

Weather Forecast

Cloudy with sunny periods. Precipitation: Nil. Alpine temperature: High -4 °C. Ridge wind west: 20 km/h. Freezing level: 1700 metres. A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Warming in the region Saturday will create isolated moist surface snow, snowballing, and likely wet loose slides. Wind effect well pronounced in the alpine and exposed TL areas. 10cm of low density snow overlies a mix of old facets and/or surface hoar and sun crust. A strong mid-pack sits over a deep persistent weaknesses of facets and depth-hoar.

Avalanche Summary

Older (-72hrs) size 1.5 triggered by a cornice in the Parkers Ridge Area from steep rocky terrain. Main area of concern is where overhead cornices threaten unevenly distributed snowpack areas, increasing the probability of triggering a deep weakness. Report, and read about riding conditions on Avalanche Canada's Mountain Information Network.

Confidence

Freezing levels are uncertain on Saturday

Régions couvertes