Boletín de aludes

Kananaskis

Mar 16 – 17, 2020Avalanche Canada
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Archivado · caducó 7 years ago

Peligro de aludes

Wed
Thu
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Avoid steep, shallow, rocky areas where the basal facets are more likely to be triggered. Wind slabs need a bit more time to heal.  

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3

    If large cornices release, they can trigger deeper instabilities.

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2.5

    Wind slabs are still a concern in the Alpine and Treeline elevation bands. Multiple layers of wind slab may be found in wind prone areas.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1.5–3

    This layer is still out there, and is most concerning in shallow, rocky areas.

Confidence

Moderate -

Weather Forecast

Tuesday is forecast to bring a mix of sun and cloud with light flurries developing in the late afternoon. The high is expected to reach -4c, along with light variable winds. The freezing level is shown to be near valley bottom.

Avalanche Summary

Several loose wet slides up to size 1.5 were observed on solar aspects.

Snowpack Summary

We still have a winter snow pack with widespread wind slabs dominating the alpine and open areas at treeline. Some of these slabs are soft slabs producing easy results within the top 10-20cm. The mid pack remains strong while the basal facets are weak.

Expect sun crust on solar aspects and some places at valley bottom from the clear skies from Monday.  

Terrain and Travel

  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Avoid shallow snowpack areas, rock outcroppings and steep convex terrain where triggering is most likely.
  • Caution around slopes that are exposed to cornices overhead.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.

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