Bulletin d’avalanche

Little Yoho

Mar 13 – 14, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

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

Points saillants

Increasing wind and more snow on the way will create fresh wind slabs in the alpine and possibly into tree line on Monday.

Problèmes avalancheux

  • Wind Slabs

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

    Up to 20cm of low density snow is available for transport. The winds is expected to increase Sunday night into Monday to the strong range from the West. The wind is expected to redistribute the available snow creating fresh wind slabs on Monday.

  • Persistent Slabs

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

    Buried crust/facet layers exist in the upper snowpack on steep solar aspects and have resulted in a few large avalanches over the past week. These persistent layers can be tricky to assess so use caution on slopes where they are present.

Weather Forecast

A slow but steady stream of precipitation is expected between Sunday evening and Wednesday morning. Up to 25cm is expected throughout that period. Also, the wind is expected to be strong from the West on Monday. Temperatures will generally be seasonal, with valleys warming to zero in the afternoons and the high alpine ridges remaining about -10.

Snowpack Summary

15-30cm of very low density snow over a buried sun crust on steep solar aspects. Very little wind or wind effect observed today. Feb 16 sun crust down 30-40 cm on steep solar aspects. Jan 30 sun crust or facet interface down 50-80 cm. The lower snow pack is generally well settled with typical weak facets found in shallow areas.

Avalanche Summary

A large avalanche was heard near theTakakkaw Falls study plot above above the Iceline trail in Little Yoho this afternoon. Both ski areas reported very small windslabs less than size 1 in immediate alpine lee areas. No other avalanches were observed or reported.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

Régions couvertes