Bulletin d’avalanche

Little Yoho

Jan 21 – 22, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

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Avalanche closures are in effect for Simpson Area (in Kootenay) and Sunshine Ski Area Access Road on Friday, Jan 21. Avalanche control planned, please no skiing of climbing in these areas.

Problèmes avalancheux

  • Wind Slabs

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

    Recent winds have produced fresh wind-slabs in the alpine and some tree-line locations.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3.5

    This problem represents both the Dec. 2nd crust/ facet layer (treeline and below) and layers of faceted snow that were formed during the late December cold snap (all elevations). This is primarily an issue in shallower snowpack areas.

Weather Forecast

A ridge of high pressure will move into the area on Friday. Scattered clouds and light snow are forecasted. There is potential for high freezing levels and lots of sunshine on the weekend.

Snowpack Summary

Recent wind and new snow have created fresh wind slabs in the alpine and some tree-line areas. New snow and windslabs overlie facets in many places resulting in wide propagations in recent avalanches. The Dec. 2 crust and facets are generally 100-150cm deep producing hard to no results. Snow depth at tree-line is around 200-250 cm.

Avalanche Summary

Sunshine reported fresh windslabs in the alpine that were easily triggered by skiers. Avalanche control in Yoho Tuesday produced slabs with every shot. Most were failing on a windslab or facet layer 40-60cm deep and then entraining facets in the track. One stepped down to the November facets ~ 180 cm deep.

Confidence

Freezing levels are uncertain on Saturday

Régions couvertes