Bulletin d’avalanche

Jasper

Nov 23 – 24, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

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

Points saillants

Warmer temperatures, high humidity, moderate to strong winds and new snow are a good recipe for new windslab development.

Problèmes avalancheux

  • Wind Slabs

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

    Watch for previous wind loading especially in cross-loaded features. Warmer temperatures, high RH, moderate to strong winds, and new snow will likely be creating new windslabs in the alpine and down into treeline.

  • Deep Persistent Slabs

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

    60-80cm of storm snow from Nov 13-15th has settled over a series of crusts and weak snow crystals at the base of the snowpack.

Weather Forecast

Tonight: Flurries.

Accumulation: 6 cm.

Alpine temperature: Low -7 C.

Ridge wind SW: 15 km/h gusting to 50 km/h.

Tuesday: Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -6 C.

Ridge wind W: 10-25 km/h.

Snowpack Summary

Strong SW winds stripped all aspects in the alpine. New snow with warm temperatures and moderate winds will likely create new wind slabs. Above freezing temperature to 1700m will likely result in a future crust. A 1-2cm thick crust 80cm down is found up to 2500m or higher. Below this crust are more crusts or facets depending on elevation.

Avalanche Summary

No new avalanches were observed on Monday.

Confidence

Due to the number and quality of field observations

Régions couvertes