Bulletin d’avalanche

Jasper

Mar 28 – 29, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

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

Avalanche conditions are expected to improve in the short term with cooling temperatures.

High freezing levels are forecasted for Wednesday and may lead to an increase in avalanche hazard.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2.5

    Recently formed wind slabs can be found in lee features near ridge crests, and in cross-loaded gullies.

  • Storm Slabs

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

    The new snow along with warm temperatures may lead to the formation of storm slabs. The distribution BTL is dependant on the freezing levels Sunday afternoon / evening (elevations where it is raining and below will not have a storm slab problem).

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3

    New snowfall, warm temperatures and moderate to strong winds may be the triggers that wake up this layer.

Weather Forecast

The current storm is expected to end overnight Sunday with isolated flurries, light to moderate N-NW winds and freezing levels lowering to valley bottom on Monday and Tuesday. 

Snowpack Summary

10cm of HN with continued snowfall brings the recent HST up to 40cm. This new snow overlies previous surfaces such as hard windslab and variable crusts at TL/ALP elevations. The snow pack varies throughout the region from strong supportive snow in deeper areas to weak facetted snow in the shallow areas.

Avalanche Summary

Limited observations due to poor visibility. Avalanche control is planned for later today and this evening and results will be reported in tomorrow's bulletin.

Confidence

Intensity of incoming weather systems is uncertain

Régions couvertes