Boletín de aludes

Northwest Coastal

Jan 19 – 20, 2014Avalanche Canada
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Archivado · caducó 13 years ago

Peligro de aludes

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

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–4
    Thin wind slabs that formed Saturday night and Sunday should be largely manageable. Be aware off the potential for deep hard wind slabs if you're sizing up bigger terrain in the alpine.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    4–7
    Two weaknesses have the potential to surprise folks: Surface Hoar one meter below the surface and very weak basal facets near the ground. Vigilant slope by slope evaluation and/or a modest terrain approach are appropriate at this time.

Weather Forecast

A strong ridge of high pressure continues to dominate with no sign of a breakdown in sight. The NW Coast should fair slightly better than the rest of the province with a few pulses of precip. Freezing levels are on the rise throughout the forecast period.Monday: Freezing Level: 1200m. Precip: 3/8mm; Wind: Lht S, Strong SW at ridgetop.Tuesday: Freezing Level: Inversion, Above Freezing Air from 1300 2100m; Precip: Nil; Wind: Mod, SW.Wednesday: Freezing Level: Inversion breaking down late in the day, Above Freezing Air from 1300 2000m; Precip: 1/3mm Wind: Mod, SW

Avalanche Summary

No new avalanche activity reported on Saturday. The last significant cycle tapered off Jan 15th. It featured natural avalanches to size 4 with releases on all aspects and elevations.

Confidence

Fair - Freezing levels are uncertain

Snowpack Summary

Previously strong winds have left widespread wind loading/wind damaged snow in their wake. Most of these wind slabs are probably growing old and tired but may still pose a problem in bigger terrain. Warming temps along with a bit of rain at lower elevations has formed a variety of crusts at and below treeline. The early January surface hoar is most active in the north of the region between 900m and 1400m. It was a player during the last cycle even in low angled terrain. Look for it 70 -100 cm below the surface. Professionals continue to keep an eye on the basal facets which can be found down around two meters below the snow surface.

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