Bulletin d’avalanche

Jasper

Feb 21 – 22, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

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

It's been a while, but a storm is coming!

Watch for signs of instability, and avoid overhead exposure during periods of rapid loading and rising temperatures.

Problèmes avalancheux

  • Wind Slabs

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

    Strong to extreme SW winds with new snow are likely to build wind slabs in the alpine and tree line areas.

  • Deep Persistent Slabs

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

    Caution in thin snowpack areas where triggering is more likely. This is a low probability but high consequence problem.

Weather Forecast

Sunday: Periods of snow. Accumulation: 17 cm. Alpine temperature: High -6 C. Ridge wind southwest: 35 km/h gusting to 90 km/h. Freezing level at valley bottom.

Monday: Flurries. Accumulation: 7 cm. Alpine temperature: Low -14 C, High -5 C. Ridge wind west: 25 km/h gusting to 80 km/h. Freezing level: 1400 metres.

Snowpack Summary

Moderate to strong ridge top winds from the SW have created wind slabs or hard surface conditions in alpine and tree line features. In sheltered areas the top 30-60cm is faceted snow over a supportive mid-pack where the snowpack is deeper. Thin snowpack areas are weak, un-supportive, and facetted.

Avalanche Summary

No new avalanches have been observed in the past couple days.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Régions couvertes