Bulletin d’avalanche

Jasper

Jan 17 – 18, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Avoid the alpine entirely as well as treeline features with wind effect and overhead hazard. The safest and best skiing will be found in sheltered locations.

Problèmes avalancheux

  • Wind Slabs

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

    Continued light and moderate 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 where buried deeper weak layers could be triggered.

  • Loose Dry

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

    Ice climbers be wary of this problem as even small avalanches can quickly gain volume and have serious consequences. The storm snow remains loose and unconsolidated. Watch for triggers that would wake this up such as rising temperatures and wind.

Weather Forecast

Sunday: Cloudy with sunny periods and isolated flurries. Low -11, High -7. Wind W: 20 km/h gusting to 55 km/h.

Monday: A mix of sun and cloud. Low -14 C, High -9 C. Mostly light ridge wind occasionally gusting to 35 km/h.

Tuesday: Cloudy with sunny periods and isolated flurries. Low -14 °C, High -9 °C. Ridge wind west: 20-40 km/h.

Snowpack Summary

Jan 13th brought upwards of 55cm of new snow to the region and it continues to settle with mild temperatures. The alpine and wind prone treeline has had and will continue to have strong winds promoting wind effect, wind slab formation and cornice growth. The midpack is supportive. Near the ground it is weak facets and depth hoar.

Avalanche Summary

Several size 1 wind slab avalanches from the last 24 hours out steep alpine terrain were observed on road patrol on highway 93N today. No other avalanches observed.

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Confidence

Wind speed and direction is uncertain on Tuesday

Régions couvertes