Boletín de aludes

Kananaskis

Dec 30 – 31, 2017Alberta Parks
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Archivado · caducó 9 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

Great skiing right now with the new snow. Sluffing is a real hazard and watch for localized wind slab development at higher elevations.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    Both recently formed and recently buried wind slabs are present in the Alpine on all aspects, and in isolated spots at Treeline. With the increased snow load, these slabs are now more sensitive to triggering.

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely
    Tamaño
    1–2
    Lots of recent snow is leading to sluffing in steep terrain at all elevations. Some of these slides are running surprisingly far. Ice climbers should be particularly cautious with this problem.

Confidence

Moderate -

Weather Forecast

Sunday will be sunny with cloudy periods and no new snow. Temperatures are finally beginning to moderate, and after another cold night the daytime high should be a comparably pleasant -13 °C at higher elevations. Ridge top winds will be out of the west at 15 km/h. As the week progresses temperatures will continue to moderate with highs near 0°C by Wednesday or Thursday.

Avalanche Summary

Loose dry avalanches continue to occur in steep terrain at all elevations and on all aspects. These slides are generally size 1.5 or smaller, but are running a far distance in some terrain features.

Snowpack Summary

Another 10 to 15cm of new snow overnight brings the storm snow total to 40 to 50cm. This snow is mostly still low density in nature except in the high Alpine and in wind prone areas. Expect to find slabs on all aspects in the Alpine that have either been recently formed, or formed earlier in the storm and are now buried. At Treeline and below the Dec 15th surface hoar layer is buried between 40 and 60cm deep and is failing in loose dry avalanches, but not yet as a slab due the lack of an overlying cohesive layer. With increased winds this could change. Recent snowpits are showing that the November crusts are faceting, but these layers have not been active as an avalanche problem.

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