Bulletin d’avalanche

Banff Yoho Kootenay

Jan 10 – 11, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Human triggered avalanches are likely on the Oct .26 basal facets/depth hoar. Watch for wind loading Friday as this could trigger large natural avalanches.

Problèmes avalancheux

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–3.5
    The Oct. 26 layer is still very active. Some large natural avalanches are still occurring and human triggering is likely. This layer needs time to adjust to the load and this problem will be around for some time.

Weather Forecast

Warmer temperatures for the next couple of days (still below freezing) and no significant snow in the forecast. SW winds may increase Thursday in the alpine which is something to look out for.

Snowpack Summary

Up to 70 cm of snow of recent snow with variable wind effect has put a dense load over the persistent weak layers. In thicker snow pack areas, the Dec. 10th weak layer of facets is now down 100-150cm with a stronger snowpack below. In thin snowpack areas, the Dec.10th layer is mixed in with the October 26 basal facets and crust.

Avalanche Summary

We keep getting reports of large avalanches happening in various locations. Today we had a report of numerous size 2 - 3.5 avalanches initiating naturally in the Cirque Peak and Jimmy Simpson area along Highway 93N. They were reported to step down to the basal facets, and a localized increase in wind was the likely trigger.

Confidence

Régions couvertes