Boletín de aludes

Lizard-Flathead

Mar 5, 2019Avalanche Canada
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Archivado · caducó 8 years ago

Peligro de aludes

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

Persistent slab avalanches continue to pose a low likelihood, high consequence problem at lower elevations.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–1.5
    Wind slabs could be reactive to human triggering at upper elevations.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1.5–2.5
    Buried surface hoar layers have been a problem at lower elevations over the past month. Although the likelihood of triggering these layers has decreased, this problem still warrants conservative travel in steep open terrain.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

MONDAY NIGHT: Clear, light northeast wind, alpine temperatures drop to -15 C.TUESDAY: Sunny, light southeast wind, alpine high temperatures near -8 C.WEDNESDAY: Cloudy with isolated flurries, trace accumulations, light southeast wind with moderate gusts, alpine high temperatures near -10 C.THURSDAY: Scattered flurries with 5-12 cm of snow, 30-50 km/h southwest wind, alpine high temperatures near -4 C.

Avalanche Summary

On Monday, one small (size 1) skier triggered slab avalanche was reported on an east aspect at 1850 m. A few small (size 1) wind slab avalanches and loose dry sluffs were reported over the weekend.

Snowpack Summary

Sheltered areas have 20-40 cm of low density snow on the surface while exposed terrain has been wind affected. Sun crusts can be found on the surface on south-facing slopes. There are potentially three layers of surface hoar in the upper snowpack. One is down 30-50 cm, another is down 40-80 cm, and the last one is down 80-120 cm. These layers have been most prominent and reactive between 1600 and 1900 m over the past month. The lower portion of the snowpack is generally strong.

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