Boletín de aludes

Northwest Inland

Mar 4 – 5, 2015Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

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

Avalanche danger is rising with incoming snow and strong winds.

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–3
    Incoming snow and strong winds are likely to build storm slabs and wind slabs. These may fail naturally or be triggered with the weight of a person. There's also a slim chance of a deeply buried weakness waking up, causing a very large avalanche.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    Rainfall below treeline may trigger loose wet avalanches in steep terrain.

Confidence

Fair - Due to the number of field observations

Weather Forecast

5-10 cm snow is expected on Thursday. This is followed by cloudy skies with possible flurries on Friday and Saturday. Strong to gale SW to W winds persist over the next three days. The freezing level is near 1000 m.

Avalanche Summary

A skier triggered an isolated size 1 wind slab in the alpine on Tuesday. Small loose moist avalanches were also observed on steep solar aspects over the last couple of days. Over the weekend, avalanches to size 3 were reported from steep un-skiable south through west facing terrain features and isolated cornice fall produced a few slabs out of extreme terrain. Very thin wind slabs on NE facing alpine features were also observed. Glide cracks are starting to open up too. New snow and wind are likely to create storm slabs and wind slabs which could be triggered naturally, or with the weight of a person.

Snowpack Summary

Incoming snow and strong winds are likely to build wind slabs on lee features, and storm slabs in more sheltered spots. Previous outflow winds created isolated stiff thin wind slabs, which may now be buried under new snow. A variety of other interfaces may be found under the new snow, including a sun crust, an old rain crust, surface hoar, and/or surface facets. At the base of the snowpack, weak facets may be found. Keep an eye out for cornices that could fail.

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