Bulletin d’avalanche

Jasper

Apr 5 – 6, 2022
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Archivé · expiré 4 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Strong winds have created fresh wind slabs in the alpine. On Wednesday watch out if the sun comes out -  wet loose avalanche down low and cornices up high could wake up.

Problèmes avalancheux

  • Wind Slabs

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

    Strong SW winds created fresh wind slabs. These new wind slabs sit over a variety of firm surfaces including wind effected snow and sun/temperature crusts.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3.5

    Fresh cornices might become reactive with strong solar input

  • Loose Wet

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

    Main concern during the heat of the day and solar input.

Avalanche Summary

A few small, size 1 wind slabs have been observed in higher elevation leeward features.

Confidence

Timing or intensity of solar radiation is uncertain on Tuesday

Snowpack Summary

Strong SW winds are redistributing the recent snow into lee features in the alpine and down into treeline. The freezing level is around 2200m. There is a sun crust high into the alpine on solar aspects and and melt freeze crust up to 2200m. There is a well settled mid-pack.

Weather Forecast

Wednesday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -8 C.

Ridge wind west: 10-25 km/h.

Freezing level: 1400 metres.

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -8 C, High -3 C.

Ridge wind southwest: 15 km/h.

Freezing level: 2000 metres.

Régions couvertes