Boletín de aludes

South Rockies

Jan 30 – 31, 2019Avalanche Canada
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Archivado · caducó 8 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Continue to use caution due to the weak layers buried in the snowpack.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–1.5
    Around 10 to 30 cm of snow sits above a weak layer of feathery surface hoar crystals. The surface hoar is likely best preserved in shaded and sheltered areas between 1500 m and 1900 m.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    The bottom of the snowpack consists of weak and sugary faceted snow. There is a relatively low likelihood of triggering this layer, but the consequences remain high, as avalanches on this layer will be large and destructive.

Confidence

High -

Weather Forecast

WEDNESDAY NIGHT: Mostly clear skies, freezing level below valley bottom.THURSDAY: Increasing clouds over the day, light to moderate southwest winds, alpine temperature -5 C, freezing level 1000 m.FRIDAY: Mostly cloudy with light snowfall, accumulation 1 to 3 cm, light to moderate southwest winds, alpine temperature -1 C, freezing level 1800 m.SATURDAY: Mostly cloudy with light snowfall, accumulation 1 to 3 cm, light southwest winds, alpine temperature -3 C, freezing level below valley bottom.

Avalanche Summary

Evidence of a small avalanche triggered by a snowmobile was observed on Tuesday, releasing on the surface hoar layer described in the Snowpack Summary. Shooting cracks were also observed, suggesting instability with that layer. Otherwise, no new avalanches were observed.

Snowpack Summary

Around 10 to 30 cm of snow overlies a weak layer of feathery surface hoar crystals, with the most snow found at higher elevations. The surface hoar is most prominent between 1500 and 1900 m. The middle of the snowpack is generally consolidated. The bottom half of the snowpack is unconsolidated and composed of weak and sugary faceted grains.

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