Bulletin d’avalanche

Jasper

Jan 27 – 28, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

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

Expect strong Westerly Alpine winds Sunday.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2.5
    Strong winds last week left widely scoured surfaces with pockets of hard windslab. These appear to be stubborn to human triggering. Strong alpine winds expected Sunday maintaining this problem.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3.5
    Despite lack of natural activity, it would be wise to assess the strength of the interfaces above & below the October 25 crust before entering committing lines. This layer exists in most skiable slopes and would be severe consequences if triggered.

Weather Forecast

Sunday will be isolated flurries, -7, and 15 gusting 65 km/hr NW winds. Monday will be a mix of sun and cloud, no new snow, -16 to -8, and light NW winds.  A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Warming in the region has created isolated moist surface snow conditions up to 2200m. Wind effect is 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

Saturday's patrol noted a couple of size 1 moist loose avalanches on steep alpine terrain.

Confidence

Régions couvertes