Bulletin d’avalanche

Jasper

Apr 22 – 23, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré

Points saillants

Forecast freezing levels and snowfall amounts are uncertain for the next 48 hours.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2

    Rising winds monday redistributed recent storm snow to lee features combined with new snow, wind and warm temperatures on Tuesday

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3

    New load with warm temps could increase the likelihood of triggering.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Some forecasts are calling for up to 12mm of rain up to treeline (freezing levels uncertain) in the Columbia Ice fields area on Tuesday

Weather Forecast

Tuesday up to 15cm of snow (rain below treeline) with moderate-strong SW wind and freezing levels to rising to 2200M. Wednesday, Cloudy with an additional 5-10cm throughout the day along with moderate west winds. 2200M freezing levels. Thursday, clear skies cooler temps -10 with light winds from the west and freezing levels in the valley bottom.

Snowpack Summary

20cm of recent settled snow now overlies several crusts / facet layers in the upper 40cm, and a faceted layer down 70cm on shady aspects. Expect isothermal snow at lower elevations (below treeline).

Avalanche Summary

Recent whumfing in low angle alpine terrain.

Natural and controlled avalanche cycle last friday produced persistent slabs, wind slabs and loose dry avalanches to mainly size 2 max size 3 in the alpine.

Confidence

Freezing levels are uncertain on Tuesday

Régions couvertes