Bulletin d’avalanche

Banff Yoho Kootenay

Feb 11 – 12, 2025Avalanche Canada
Voir sur la carte
Archivé · expiré 2 years ago

Danger d’avalanche

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

Points saillants

We are pressed under a cold Arctic airmass with rock bottom temperatures. Consider the risk of prolonged exposure in the event of even a small incident and plan accordingly.

Problèmes avalancheux

  • Wind Slabs

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

    Winds have created a layer of hard windslab in many alpine lee features and moved snow in open areas at treeline. The wind transport has contributed to slab development with potential failure planes in the storm snow, at the January 30 facets, sun crusts, and isolated surface hoar.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported today.

Snowpack Summary

Storm snow from last week has been redistributed into wind slabs, which now sit on top of the Jan 30 interface. This layer is active, with recent avalanche activity. The mid-pack is generally weak with facets while depth hoar over a crust forms an even weaker base. The snowpack is the weakest in eastern areas where snow depths are low. In these areas the basal weaknesses should be carefully considered.

Weather Summary

Tomorrow's temperatures will remain as cold as today, with only a gradual warming trend through the coming week. The wind will stay light from the North, maintaining the influence of the Arctic air mass. No snow is expected, though some cloud cover may develop in the afternoon.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Closely monitor how the new snow is bonding to the old surface.
  • Be mindful that deep instabilities are still present in the snowpack.

Régions couvertes