Bulletin d’avalanche

Jasper

Jan 5 – 6, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible
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Points saillants

Look for sheltered terrain for the best skiing and avoid thin to thick areas in the alpine.

Problèmes avalancheux

  • Wind Slabs

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

    Wind slabs will need a few days to heal.

  • Persistent Slabs

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

    Use caution around thin to thick areas where buried weak layers could be triggered.

  • Loose Dry

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

    Steep rocky faces and slopes above gulleys hold enough snow to sluff off and bury you deeply if caught in a terrain trap.

Weather Forecast

Wednesday: Flurries. Accumulation: 6 cm. Alpine temperature: Low -10 C, High -8 C. Ridge wind southwest: 15-25 km/h.

Thursday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: Low -11 C, High -7 C. Ridge wind light to 15 km/h.

Snowpack Summary

45cm of new snow further buries the mid-December persistent layers, (surface hoar and facet combo) down 40-70cm. The mid-pack is supportive where snow is deeper than 60cm. The bottom of the snowpack consists of facets and depth hoar.

Avalanche Summary

During the storm on Jan 3. serval large natural avalanches were observed in the alpine on all aspects. Avalanche control had varied results from no results to several size 3 wind slabs stepping down to deep weakness on all aspects in the alpine.

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Confidence

Régions couvertes