Bulletin d’avalanche

Jasper

Dec 20 – 21, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

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

Avalanche hazard is decreasing, however, recent winds made looking for good skiing a little more difficult.

Problèmes avalancheux

  • Wind Slabs

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

    Recent avalanche control with minimal results, together with next to no natural activity proved this problem quite stubborn.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3

    Triggering this layer would be a high consequence event - cautious decisions and thorough investigation is necessary. More likely to trigger this layer in transitions from thin snowpack to deeper loaded pockets or terrain features.

Confidence

The weather pattern is stable

Weather Forecast

Monday: Sunny with cloudy periods. Precipitation: Nil. Alpine temperature: High -14 °C. Ridge wind west: 10-20 km/h.Tuesday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: Low -18 °C, High -13 °C. Ridge wind west: 20 km/h. Freezing level at valley bottom.

Snowpack Summary

Moderate SW winds and small amounts of new snow has formed sensitive wind slabs in alpine and treeline areas. Mid and lower snowpack are mostly well consolidated base on recent observations.

Avalanche Summary

Avalanche control with use of explosives produced no significant results other than 2 small thin wind slabs. 1 larger natural wind slab was observed right below ridge crest in steep alpine feature on NE aspect.

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