Bulletin d’avalanche

Little Yoho

Jan 3 – 4, 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

Good skiing can be found in sheltered areas, and conditions are improving. Use caution in wind loaded areas, and stay prepared for the continued cool temperatures!

Problèmes avalancheux

  • Wind Slabs

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

    Previous strong SW winds have created wind slabs in alpine and exposed treeline lee areas. These have been a bit more stubborn than expected but could still be triggered by skiers in steep terrain, especially in the alpine.

Weather Forecast

Moderate gusting to strong SW winds in the alpine on Sunday night, dropping into the moderate range on Monday with treeline temperatures steady in the -15 C range. A few flurries are expected with up to 5 cm of accumulation and a generally cloudy day on Monday.

Snowpack Summary

5-10 cm of snow overnight with strong SW winds up high. Wind slabs are present in lee areas of the alpine and some treeline locations with wind effect in open alpine areas. 90-110 cm over the Dec 2 crust/facet combo which exists below 2200 m. Shallow snowpack areas (<100cm) have weaker basal facets. Snowpack depths at treeline are from 150-250 cm.

Avalanche Summary

Some size 1-2 wind slab avalanches triggered by explosives and ski cutting at the local ski areas Sunday. A couple cornice failures creating small avalanches in steep terrain but very little natural activity overall. Still keeping in mind the skier triggered size 2 avalanche Thursday in Kootenay on the Dec 2 crust/facet interface at about 2000 m.

Confidence

Due to the number and quality of field observations

Régions couvertes