Boletín de aludes

Banff Yoho Kootenay

Dec 29 – 30, 2014Parks Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

We are in a holding pattern and have little confidence in our snowpack at tree line and above. Continue to avoid steep or convex terrain especially if there are terrain traps below, and enjoy the good skiing on lower angled well supported slopes.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    10 to 25cm's of snow from last week is bonding poorly to previous surfaces and remains reactive to skier triggering in areas where there is some wind loading and slab development. This is more of a problem in the western areas of the park

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    A weak and facetted basal layer exists at the bottom of the snowpack. It is still possible to trigger this in many areas at tree line and above. Areas with more wind loading or a stiffer slab above the weak basal facets are of the greatest concern.

Weather Forecast

Cloudy overnight then clearing skies with cold temperatures and NE winds are forecast for Monday. A warming trend with continued clear skies is forecast for Tuesday and Wednesday.

Snowpack Summary

Recent winds have created small wind slabs in the alpine which sit over the Dec 18 layer of crust, facets and/or surface hoar depending on the location. A poor bond exists at this interface. At the base of the snowpack weak crusts and facets exist which are also a concern. Overall the snowpack is quite weak and does not inspire much confidence.

Avalanche Summary

A skier triggered size 1.5-2 avalanche was reported today in the Wizard Chutes near Healy Creek at approximately 1900m. It started as a small wind slab near tree line and then stepped down to the basal facets. Other small skier and explosive triggered wind slabs have been reported by the local ski areas in the last 48hrs.

Confidence

Regiones cubiertas