Boletín de aludes

Northwest Inland

Dec 7 – 8, 2016Avalanche Canada
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Archivado · caducó 10 years ago

Peligro de aludes

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

Watch for wind blowing snow around at ridgetop that indicates wind slabs are forming on exposed downwind slopes.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    New wind slabs may exist in the alpine and on exposed features at treeline. Wind slabs may be touchy in areas with buried surface hoar.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

Thursday: Dry, some high cloud and cold. Treeline temperatures around -23 C. Winds easterly 50-70 km/h.Friday: Increasing cloud, but staying dry. Treeline temperatures around -22 C. Winds easterly 60 km/h, diminishing during the day.Saturday: Flurries. Temperatures around -25 C. Light or moderate easterly winds.

Avalanche Summary

Wind slabs avalanches are a concern where wind is being blown around. No new avalanche reports on Tuesday or Wednesday; however; check out the new MIN report for the Miller Ck/ Crater Lk area. That report indicated a natural size 2 slab avalanche which appeared to be a cornice failure in steep complex terrain. The avalanche was noted from a southeast aspect at 1850 m. The crown was 20-30 cm thick, 60 m wide and running up to 300 m in length.

Snowpack Summary

Recent winds have blown from many directions, most recently from the east. As a result, expect wind slabs to exist on a wide variety of exposed slopes. A layer of surface hoar was reported around Hudson Bay Mountain last week, which now sits beneath 40-50 cm of settling snow. A thick rain crust that formed in early November is now buried 50-60 cm deep, and recent snowpack tests produced sudden results on facets (sugary snow) above this crust. Early season snowpack observations are still very limited in the region, but reports suggest the average snowpack depth is 50-90 cm at treeline and 120 cm or greater in the alpine.

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