Boletín de aludes

Jasper

Jan 11 – 12, 2019Parks Canada
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Archivado · caducó 8 years ago

Peligro de aludes

Sat
Sun
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

Watch out for building wind slabs and cornices.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2.5
    Moderate - strong W winds, snow available for transport, and warming temps continue to add to the wind slab problem.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–3.5
    The Dec. 11th layer of facets and surface hoar is buried more than a meter deep. This layer is strengthening but was active during the recent storm.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–4
    The base of the snowpack is weak and facetted in shallow areas and will likely be for some time. The Jan 2-4th 85cm of new snow in combination with a skier has the potential to overload this weakness.

Weather Forecast

Friday will be cloudy, no precipitation, Alpine High -7 C, and ridge wind southwest 15 km/h. Saturday will be sun, Alpine temperature low -3 C high -1 C, wind southwest 10 km/h, and freezing level 1900 metres. Temperatures may be warmer than forecasted on Saturday. A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Moderate to strong winds and allot of snow available for transport from Jan 2-4th 85cm storm continues to build ridge top wind slabs. Last week's snow is settling into a cohesive layer and is overlying; previous widespread wind effect; the Dec. 11th layer in the mid-snowpack; and a weak facet layer on the ground (particularly weak where shallow).

Avalanche Summary

No new naturals observed on Thursday and visibility was good. To the South of Saskatchewan crossing there continues to be consistent reports of large avalanches. Jan 5th helicopter control produced numerous large avalanches with one on Sunset peak destroying 14 hectares of mature timber.

Confidence

Freezing levels are uncertain on Saturday

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