Bulletin d’avalanche

Jasper

Apr 23 – 24, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

The recent winds have left windslabs in immediate lee features in the alpine & upper treeline.

Problèmes avalancheux

  • Wind Slabs

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

    Continued winds Tuesday redistributed recent storm snow to lee features combined with new snow, and warm temperatures.

  • 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

    Cooling weather on Wednesday should keep the snow cold. Watch out for sunny periods and slopes catching the sun.

Weather Forecast

Wednesday: Broken skies and slightly cooler temps -10 in the alpine along with moderate west winds. Trace precip. Freezing Level 1700M

Thursday: The skies should clear and give a excellent overnight recovery with lows in the -15 range. Winds will be generally light westerly.

Friday: Warmer temps -6 and cloudy skis, Freezing level to rise to 2100M

Snowpack Summary

Previous moderate to strong south westerly winds have created Fresh wind slabs in immediate lee features in the southern part of the bulletin region. this 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.

1 size 1.5 Steep N aspect alpine, cornice triggered windslab that appears to have stepped down to a persistent layer.

Confidence

Régions couvertes