Boletín de aludes

Jasper

Apr 14 – 15, 2013Parks Canada
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Archivado · caducó 13 years ago

Peligro de aludes

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

Observations and cool temperatures are supporting a relatively stable snowpack but evaluate each slope as local variations exist. 

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–3
    Winds continue forming windslabs on lee aspects below ridgecrests. These slabs sit on previous crusts. Suspect it remains possible for a skier to initiate this slab where it bonds poorly to the underlying crust. N winds reverse loading pockets.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–3
    Cornices are large being a hazard by their sheer mass. They can also trigger deeper layers if failure occurs. Several cornice failures were observed last week. Some initiated storm slabs and a few deeper releases. 

Weather Forecast

Weather will be stable the next few days. Monday into Tuesday evening will be scattered flurries, minimal snow, light N and E winds, cool nighttime and daytime temperatures, and afternoon freezing level rising to 1100m. Wind direction will shift W Tuesday night with no significant weather change indicated other than a gradual temperature increase. 

Snowpack Summary

Windslabs exist on the lee aspects of exposed ridgecrests above treeline with a dusting of snow overtop. Buried temperature crusts exist below 2100m and sun crusts on steep solar aspects at various elevations. Cornices are big and looming. Gusting 105km/hr N winds last night reverse loaded pockets with the limited snow available.

Avalanche Summary

No new avalanches reported. Several cornice failures occurred last week. A few triggered deep persistent slabs with crowns up to 1m and some initiated wind slabs with a depth of 10-40cm.

Confidence

Wind speed and direction is uncertain

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