Bulletin d’avalanche

Jasper

Jan 19 – 20, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

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

Great skiing can sill be found in sheltered areas. Avoid wind effected terrain for both safety, and quality.

Problèmes avalancheux

  • Wind Slabs

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

    Previous moderate to strong westerly winds in the alpine and exposed treeline have redistributed the snow well down into the terrain.

  • Persistent Slabs

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

    Use caution around thin to thick areas. Keep an eye out for surface hoar in isolated sheltered locations below treeline. A Dec weak layer exists in West facing alpine features and could be reactive to human traffic, wind loading and solar input.

Weather Forecast

Tuesday: Cloudy with sunny periods and isolated flurries. High -8 C. Ridge wind west: 25-65 km/h.

Wednesday: Cloudy with sunny periods and isolated flurries. Low -15 C, High -10 C. Wind west: 15 km/h gusting to 45 km/h.

Snowpack Summary

30cm of unconsolidated surface snow continues to settle. The alpine and wind prone tree line areas have seen a lot of moderate to strong winds promoting wind effect, wind slab formation and cornice growth. The midpack is supportive. Spotty buried surface hoar can be found down 30cm and 70cm in sheltered and shaded locations below treeline

Avalanche Summary

No new avalanches observed on field patrol Sunday, but significant whoomphing was observed in low angle wind effected terrain.

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Confidence

Due to the quality of field observations

Régions couvertes