Bulletin d’avalanche

Banff Yoho Kootenay

Avalanche Canada
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Danger d’avalanche

Wed
Thu
Alpin
Conditions printanières
Limite forestière
Conditions printanières
Sous la limite
Conditions printanières
Périmé — ce bulletin a expiré 4 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Good coverage and excellent access to the alpine. Wind slabs are a daily occurrence. Even small wind slabs can push you into (or off of!) terrain traps where consequences are immediate and unforgiving. Loose wet avalanches are still active with daytime warming.

Problèmes avalancheux

  • Wind Slabs

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

    Lingering wind slabs remain at upper elevations. Heads up on exposed alpine features. The risk is getting taken for a ride in no fall terrain.

  • Loose Wet

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

    High freezing levels and lots of solar radiation will result in loose wet avalanches out of steeper terrain. A loose wet cycle was active up to size 2 on the Barbette Glacier on Monday.

Confidence

Moderate

  • We are uncertain about how the timing or intensity of solar radiation will affect the snowpack.

Avalanche Summary

Forecasters near the Barbette Glacier observed a natural loose wet cycle to size 2 on solar aspects, occurring midday. Wind slabs were also present on alpine lee features on polar aspects. Sunshine patrol reported several size 1 loose wet avalanches and a size 2 wind slab in the backcountry. Lake Louise patrol observed small loose wet avalanches on steep solar terrain.

Snowpack Summary

North aspects hold dry wind-affected snow. On solar aspects, a crust exist up to ridgetop. With continued daytime heating over the next few days, solar aspects and lower-elevation snowpack will weaken and break down. The lower snowpack is generally well settled.

Weather Summary

Models suggest another clear morning. A weak system arrives late Tuesday into Wednesday, bringing light alpine snow and possible valley rain. Alpine temps near zero with a chance of poor overnight recovery. Winds remain moderate to strong from the SW.

Terrain and Travel Advice

  • Limit exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
  • Wind slabs are isolated, but may remain reactive.

Régions couvertes