Bulletin d’avalanche

Banff Yoho Kootenay

Dec 21 – 22, 2022Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

The snowpack is shallow, weak and faceted. Human triggering remains possible. Extreme cold temperatures will exacerbate the consequences of being caught in an avalanche, an injury, or a gear malfunction.

Problèmes avalancheux

  • Deep Persistent Slabs

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

    A 20-60 cm slab overlies weak basal facets which continue to get weaker each day. No recent natural avalanches have been observed, but we expect human triggering to remain possible on large slopes. This problem will be around for the foreseeable future.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported on Tuesday.

Snowpack Summary

The snowpack is shallow and weak with a base of facets and depth hoar. A 20-60 cm slab overlies this weak base and could easily be triggered in some locations. Loose, faceted sluffs are being triggered below treeline in some locations and any avalanches that do release will run further than expected with the cohesion-less snow.

Weather Summary

Bitter cold with lows close to -40 on Wednesday. Thankfully the wind will remain light and variable. A warming trend with some snow is expected over the weekend.

Terrain and Travel Advice

  • Uncertainty is best managed through conservative terrain choices at this time.

Régions couvertes