Bulletin d’avalanche

Jasper

Jan 8 – 9, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Strong to extreme winds expected to build hard slabs throughout the weekend.

Sheltered areas still have plenty of turns to offer. Alpine might not be the most pleasant place to be.

"It's windy, but at least it's cold"

Problèmes avalancheux

  • Wind Slabs

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

    Approximately 10 cm of new snow in the parkway area and steadily increasing winds shifting from SW to NW will contribute to wind slab development. Due to a shift in direction of the wind, expect wind slabs in unusual spots.

  • Persistent Slabs

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

    This layer is a rain crust up to 1950m and reactive to large loads. Typically this layer is down around 40cm.If you find this layer on your adventure, a MIN report would be helpful for us to track it.

  • Deep Persistent Slabs

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

    Natural deep avalanches have not been reported in a while, yet it remains a low probability and high consequence event if you push your luck.

Weather Forecast

Saturday: Precipitation: Trace. Alpine temperature: High -18 °C. Ridge wind southwest: 20 km/h.

Sunday: Precipitation: Trace. Alpine temperature: Low -17 °C, High -8 °C. Ridge wind west: 35 km/h.

Alpine temperature inversion. Monday: Precipitation: Trace. Alpine temperature: Low -11 °C, High -7 °C. Ridge wind southwest: 30 km/h. Freezing level at VB.

Snowpack Summary

Up to 10 cm of new snow and increasing winds contributing to wind slabs building in deposition zones. The mid-pack is supportive with a questionable interface (Dec 1st layer ) down close to 40cm, which has questionable reactivity below 1900m. Basal faceting continues near or on the ground.

Avalanche Summary

No new avalanches observed or reported today.

Confidence

Régions couvertes