Boletín de aludes

Jasper

Feb 25 – 26, 2016Parks Canada
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Archivado · caducó 11 years ago

Peligro de aludes

Thu
Fri
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Lo esencial

Danger has the potential to increase with intense sun especially on steep Southerly aspects in the afternoons.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2
    Wind slabs are bonding well, however caution is still warranted in immediate lees and cross loaded terrain above treeline.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Persistent weak layers of decomposed surface hoar, facets, and depth hoar are in many locations. These layers have been stubborn to trigger underfoot but could trigger with a cornice failure or from shallow spot.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Loose wet avalanches, especially in the later afternoon with warm sunny skies, are possible on south and westerly aspects. Probability increases with sun.

Weather Forecast

The next few nights will be cold and -3 to -6 during the day with scattered clouds, mainly sunny, and light west winds. No new snow is expected until Saturday.

Snowpack Summary

Approximately 20cms of soft surface snow in sheltered locations at TL over a supportive mid-pack. This is sitting on a weak basil facet layer. BTL, the HS is more inconsistent in depth and support. Solar aspects have a thin sun crust down 20cms and producing moderate to hard resistant compression test results. Recent sun may create surface crusts.

Avalanche Summary

No field trip Wednesday. Tuesday observed two new avalanches observed above the Maligne road which appeared to be solar triggered. Some cornice failures also noted in Icefields area which triggered the basal weakness.

Confidence

Timing or intensity of solar radiation is uncertain

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