Boletín de aludes

Jasper

Feb 10 – 11, 2016Parks Canada
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Archivado · caducó 11 years ago

Peligro de aludes

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

Crazy warm temperatures on Tuesday. Give the snowpack a couple days to adjust. The cooling trend will help to stabilize.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Windslabs will persist on lee aspects and crossloaded features. Triggering one has potential to initiate a deep release. May be pockets of decomposed surface hoar lurking 30-60cm down.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Previously formed slabs now comprise the upper and mid-pack in many locations. They can rest on weak facets.

Weather Forecast

Now until Friday, freezing level will hover around 1800m, temperatures will be seasonal -3 to -6 with good overnight freeze Tuesday night. Expect freeze thaw conditions. Mixed clouds and trace of snow rest of the week. 

Snowpack Summary

Tuesday's warm temperatures softened alpine surface snow and weakened lower elevations snowpack making for moist/wet conditions. Slabs will persist at tree-line and above on North-Easterly aspects below ridge crests and cross-loaded terrain. The mid-pack is facetted, new snow interface is a concern along with a decomposed surface hoar down 40cm.

Avalanche Summary

Warm temperatures induced a natural avalanche cycle on Tuesday late afternoon. Size 3's noted in the alpine and size 2's at lower elevations. Highway 93 was subsequently closed in the late afternoon.

Confidence

Timing or intensity of solar radiation is uncertain

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