Boletín de aludes

Jasper

Jan 28 – 29, 2015Parks Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Wed
Thu
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

Cooling temperatures over the next 72 hours will reduce the avalanche danger as the freezing level drops.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Heavy snow sits on the December weak layer. Any additional load such as a small point release can step down to this weak layer. Once the slide is moving, it will step down further to ground from the weight of the snowpack.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    Strong SW winds over the past 48 hours has  built slabs up to 60cm thick. This extra load combined with a skier will likely initiate an avalanche. As the wind reduce and temperatures drop the condition will improve.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2
    Cooling temperature will help to stabilize the moist snow which will occur most rapidly near treeline as the freezing level falls over the next 24 hours. Until this happens the snowpack at lower elevations will remain unstable and avalanche prone.

Weather Forecast

A drier and colder air mass is forecast to arrive on Wednesday. Freezing levels will fall to the valley bottom resulting in overnight freezing. Winds will be moderate from the west and south west.  Snow is expected on Friday in townsite area.

Snowpack Summary

Over the past 24 hours precipitation has fallen as rain below 2,400m. At treeline, the heavier snow sits over a persistent weak layer dating to Dec 20th. Below treeline, isothermic conditions exist.

Avalanche Summary

Avalanche control, at and above treeline, produced numerous slab avalanches up to size 3 along the icefield parkway. At times the avalanche was triggered before the explosives detonated. Below 1,800m moist point release to size 2 are traveling to mid runout. and taking the snowpack to ground.

Confidence

Freezing levels are uncertain on Wednesday

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