Bulletin d’avalanche

Jasper

Jan 7 – 8, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Winds have moderated but expect wind slabs have developed at tree line and above. Although natural avalanche activity has decreased, conservative terrain selection is advised and assess every slope.

Problèmes avalancheux

  • Wind Slabs

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

    Consistent strong SW winds continue to form wind slabs treeline and above. They appear to be stubborn but be vigilant.

  • Persistent Slabs

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

    Use caution around thin to thick areas where buried weak layers could be triggered.

  • Deep Persistent Slabs

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

Weather Forecast

Thursday will be clouds and sun, no new snow, -7C and light SW winds. Friday will be similar with 10-20km/hr SW winds. Saturday will be slightly cooler but very similar to previous days. No new snow is expected for the next 5 days. 

Snowpack Summary

40cm of new snow from Sunday is being redistributed by SW winds mainly at exposed ridge-tops. This new snow overlies a sporadically distributed surface hoar and facet layer down 40-70cm. The mid-pack is supportive except in shallow locations. The bottom is weak facets and depth hoar.

Avalanche Summary

No patrol on Wednesday and nothing reported. Tuesday's Hilda patrol had no new. Sunday-Monday, after the 40cm storm, several large avalanches were observed in the alpine. Sunday's explosive control had varied results with some several size 3 wind slabs. Some stepped down. Make your observations count by using Mountain Information Network.

Confidence

Due to the number of field observations

Régions couvertes