Bulletin d’avalanche

Banff Yoho Kootenay

Nov 20 – 21, 2025Avalanche Canada
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Archivé · expiré 10 months ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
Début de saison

Points saillants

Watch for fresh windslab development on Thursday as SW winds increase through the day, redistributing the 5 -15 cm of recent snow

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    5 - 15 cm of recent snow is available for transport into fresh windslabs, as the wind increases on Thursday. Look for isolated small windslab development in the lees of features in the alpine.

Confidence

Moderate

Avalanche Summary

No new natural avalanches observed or reported on Wednesday.

Snowpack Summary

Limited early-season observations indicate a generally well-settled Rockies snowpack with no significant weak layers. Last week's wet snow and rain left a rain crust (Nov 13) to 2300 m. In the short term, this adds stability to the snowpack and with 5-10 cm of dry snow on top, only isolated windslabs have been reported along with good early-season travel conditions. Treeline snow depths range from 40-70 cm.

Weather Summary

SW winds are forecasted to increase through Thursday and be strong to extreme on Friday. Alpine highs for Thursday will be around -5C with increasing cloud.

Terrain and Travel Advice

  • Pay attention to the wind; once it starts to blow, sensitive wind slabs are likely to form.

Régions couvertes