Boletín de aludes

Kootenay Boundary

Dec 22 – 23, 2018Avalanche Canada
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Archivado · caducó 8 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Lo esencial

A weak layer exists in our snowpack at a depth where humans can still trigger it. It is a good time to remain conservative with your terrain selection.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    Recent strong winds from variable directions have produced touchy wind slabs in lee terrain features. Be cautious near ridges on all aspects.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3
    A weak layer buried around 50 to 100 cm is the primary concern. Expect to find it on all aspects and all elevations, except for the most exposed of terrain where wind or sun may have altered it. This weak layer has recently produced large avalanches.

Confidence

High -

Weather Forecast

SATURDAY NIGHT: Cloudy with light snowfall, accumulation 5 to 10 cm, moderate to strong southwest winds, freezing level below valley bottom.SUNDAY: Cloudy with light snowfall, accumulation 5 cm, moderate southwest winds, alpine temperature -6 C, freezing level below valley bottom.MONDAY: Mostly cloudy, light southwest winds, alpine temperature -7 C, freezing level below valley bottom.TUESDAY: Mostly cloudy, light northwest winds, alpine temperature -9 C, freezing level below valley bottom.

Avalanche Summary

Large (size 2 to 3) slab avalanches were triggered by explosives on Friday. The avalanches were generally 10 to 40 cm deep and within recent storm snow. There was also further evidence of the natural avalanche cycle from Thursday.

Snowpack Summary

Strong winds from variable directions have redistributed the recent storm snow, producing wind slabs in lee terrain features on all aspects.Beneath this, around 50 to 100 cm of snow is poorly bonded to a rain crust and a weak layer of feathery surface hoar and sugary facets. Avalanche activity, remote triggering, and snowpack test results tell us that it is a critical layer. It is best to travel extremely cautiously with this layer in the snowpack.The lower snowpack is well-settled.

Regiones cubiertas