Boletín de aludes

Jasper

Jan 14 – 15, 2014Parks Canada
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Archivado · caducó 13 years ago

Peligro de aludes

Tue
Wed
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Lo esencial

The natural cycle is tapering off now but the snowpack is proving very touchy to human triggering.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    A failure in this layer is likely to trigger the weak basal facet layer below.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2
    70cm of storm snow has fallen in the past 72hrs and has been redistributed by moderate to strong SW winds onto sheltered slopes in the alpine and treeline.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3
    This layer is proving very susceptible to human triggering as evidenced by the two remotely triggered slides today. Extensive whumphing and cracking experienced particularly at treeline elevations.

Weather Forecast

Winds will continue to redistribute snow in the alpine and treeline elevations. Light snow will turn to rain at lower elevations as we go into a warming cycle.

Snowpack Summary

Up to 70cm of storm snow has been redistributed by moderate to strong SW winds creating wind slab over a strong mid-pack in lee features on top of a weak basal facets layer at the ground.

Avalanche Summary

A field team in the Maligne Lake area remotely triggered a size 2.5 from a distance of 20m. In the Icefields area a group remotely triggered a size 1.5. Both avalanches were on open slopes at treeline and ran on the basal facet layer. Whumphing and shooting cracks were observed in both locations. Some natural activity to size 2.5 observed.

Confidence

Freezing levels are uncertain on Wednesday

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