Bulletin d’avalanche

Banff Yoho Kootenay

Feb 22 – 23, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Little change until the wind picks up on Friday, and snow on Saturday. Small isolated wind slabs are still present.

Problèmes avalancheux

  • Wind Slabs

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

    Isolated wind-slabs exist in high alpine lee areas. Increased winds forecast for Friday may increase windslab development in the alpine.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1.5–2.5

    Several persistent weak facet layers exist in the mid-pack and at the bottom of the snowpack. Sporadic avalanche activity continues on these layers and the theme seems to be rocky, steep, thin snowpack areas in the alpine.

Confidence

Moderate

Avalanche Summary

Sunshine patrol reported triggering very small wind-slabs that were 10cm deep.

A skier triggered a size 1 slab on the far skiers right on the Surprise Pass ski run. It was 30cm deep and 8m wide and ran for 30m.

Snowpack Summary

Suncrust on steep solar aspects and moist snow below 2000m. Isolated wind slabs in the alpine. 10-25 cm of facetted snow over the Feb 3 crust. Persistent weak facet layers remain present in the mid and bottom of the snowpack.

Weather Summary

On Thursday, a mix of sun and cloud across the forecast region as moderate to strong moist, westerly flow continues. Trace accumulations are expected, except up to 2 cm for western-facing aspects. Freezing levels will rise to between 1600 and 1800m in the afternoon. Up to 15cm of snow is expected on the weekend.

For more information be sure to check AvCan's Mountain Weather.

Terrain and Travel Advice

  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.

Régions couvertes