Boletín de aludes

Kananaskis

Feb 8 – 9, 2016Alberta Parks
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Archivado · caducó 11 years ago

Peligro de aludes

Wed
Thu
Alta montaña
4 · Fuerte
Límite del bosque
4 · Fuerte
Bajo el límite
4 · Fuerte
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Lo esencial

3500 meter freezing levels on Tuesday means avalanche control on EEOR and a good day to hit the ski hill and give back country avalanche terrain a miss!

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Wind slabs are prevalent in any open features at treeline and above and will require avoidance during the warm air event on Tuesday.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    1–5
    With the forecast freezing levels, it is highly likely we will see cornice failures, particularly at alpine ridge and treeline ridge features on northeast aspects.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–5
    The January 6th facets are widespread at all elevations and aspects and will very likely become highly reactive to the extreme day time heating on Tuesday and the rest of the week.

Confidence

High

Weather Forecast

A mix of sun and cloud.  No new precipitation for Tuesday.  Alpine temperature 3.0 C.  Winds light to moderate 30km/h West.  Freezing levels up to 3500 meters.

Avalanche Summary

Very little to no avalanche activity observed today along the Smith Dorrien and Spray Lakes highway.

Snowpack Summary

Windslabs and storm slab interfaces are bonding and tightening up. The critical weakness in the snowpack at the moment is the January 6th facet layer.  In some sheltered locations at treeline and below the layer can be found 30-40 cm below the surface.  At higher elevations where the Jan 6th  is present, compression tests and other mechanical tests are widely variable.  The long and the short of it is that the layer is widespread and giving mixed results, therefore my confidence in the snowpack is low right now.  Therefore its a great time to keep terrain choices fairly straightforward and keeping exposure time to big features like head walls, big snow faces and cornices to a minimum.  The warmer air is here and will be around all week peaking on Tuesday.

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