Boletín de aludes

Jasper

Feb 18 – 19, 2013Parks Canada
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Archivado · caducó 14 years ago

Peligro de aludes

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

Solar triggering of the storm snow is possible with prolonged periods of sun.

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Up to 20 cm of new snow fell in the last storm. Moderate NW winds are pressing the new snow into soft slabs and building thin soft windslab on immediate lee features. These new storm slabs are sitting on smooth hard slab and sastrugi. 

Weather Forecast

Monday will be mainly dry, variable clouds and light North winds with cold air.  Tuesday, a weak pulse of 2-4 of new snow, the freezing level will rise to 1100 m and winds will remain light from the North.

Snowpack Summary

20 cm of storm snow are developing soft windslab on SE alpine and treeline slopes from moderate NW winds.  These new slabs are sitting on previous hard slab and sastrugi.  They appear to be bonding well.  The now buried hard slab is bridging weak basal facets.  15 cm of storm snow is sitting on sun crusts and facets below treeline.

Avalanche Summary

A couple of small slab avalanches (size 1.5) involving the new storm snow were observe Sunday morning on steep NE facing treeline slopes in the Parkers Ridge area.  No other avalanches were observed along the Icefields Parkway.  Visibility was excellent.

Confidence

The weather pattern is stable on Monday

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