Boletín de aludes

Banff Yoho Kootenay

Jan 4 – 5, 2022
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Archivado · caducó 5 years ago

Peligro de aludes

Wed
Thu
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado

Lo esencial

Forecasters are still uncertain about the Dec 2 crust layer and how/if it will react, especially in Kootenay. Dig down and test this layer locally before committing to a line. Ski quality is excellent in sheltered areas.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2

    Previous strong SW winds have created wind slabs in alpine and exposed treeline lee areas. These have been a bit more stubborn than expected but could still be triggered by skiers in steep terrain, especially in the alpine.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    The Dec. 2 crust/facet layer down 50-70 cm has not been a widespread problem, but uncertainty remains with the layer. Monitor carefully if you are looking at steep committing terrain.

Weather Forecast

Only a few cm's of snow overnight accompanied by a drop in temperature once again. Expect valley temps in the -15 range and at the ridge closer to -20. Wind is forecasted to remain in the strong range from the SW but it will subside to light by midday tomorrow.

Snowpack Summary

Up to 20cm storm snow in the last 2 days. The wind has eased however, wind slabs are present in lee areas of the alpine and some treeline locations. 50-70 cm over the Dec 2 crust/facet combo which exists below 2200 m. Shallow snowpack areas (<100cm) have weaker basal facets. Snowpack depths at treeline are from 120-160 cm.

Avalanche Summary

Both Sunshine and Lake Louise ski patrol reported ski cutting very small windslabs that might not even amount to a size 1. Otherwise no avalanches observed or reported.

Confidence

Due to the number and quality of field observations on Monday

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