Boletín de aludes

Kananaskis

Mar 18 – 19, 2020Avalanche Canada
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Archivado · caducó 7 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil

Lo esencial

Please make conservative choices. Now is not the time for an accident. The current pandemic is overloading the medical system and could affect backcountry rescue response.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1.5–2.5

    Wind slabs seem to be everywhere. They are most concerning for human triggering in steep, convex and unsupported terrain.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    1.5–3.5

    The deep persistent layer is still a concern, especially in shallow snowpack areas. A large cornice trigger could also be enough to weak up this layer.

Confidence

High -

Weather Forecast

A mix of sun and cloud on Thursday with occasional very light flurries. Winds will be light and variable.Temperatures should reach -7 in the Alpine. More of the same is expected Friday and Saturday.

Avalanche Summary

Several new naturally triggered avalanches occurred on the east side of the region (Mt Lawson, Mt Kidd) in the past 24 hours. These slides were up to size 2 and were in the alpine on east aspects.

Snowpack Summary

5cm of new snow fell overnight at treeline, but only a trace was recorded in valley bottoms. This new snow overlies a sun crust on solar aspects and previously formed wind slabs everywhere else. These buried wind slabs are found at all elevations and extend into open areas all the way to valley floor. The slabs are failing at a depth of about 20cm, which is making for generally poor quality skiing. Cornices are larger than normal. Although they haven't been active recently, any corniced area or slopes below should be avoided.

Terrain and Travel

  • Avoid convexities, steep unsupported terrain and rocky outcroppings.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Avoid exposure to slopes that have cornices overhead.
  • Be aware of the potential for large avalanches due to the presence of a deep persistent slab.

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