Boletín de aludes

South Columbia

Feb 10 – 11, 2016Avalanche Canada
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Archivado · caducó 11 years ago

Peligro de aludes

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

Triggering large avalanches remains possible. Carefully evaluate conditions before venturing into bigger terrain.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–4
    Recently formed wind slabs lurking below ridgecrests and behind terrain features remain sensitive to human triggers.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    3–5
    A deeply buried weak layer can still be triggered in some places, creating very large avalanches.

Confidence

High

Weather Forecast

THURSDAY: Clearing throughout the day with freezing levels around 1800m and light variable winds. FRIDAY: Mainly cloudy with light snow bringing as much as 5-10cm. Freezing levels reaching 1800m and light southwesterly winds. SATURDAY: Mainly cloudy with continued light snowfall totalling 5-10cm of accumulation. Freezing levels should drop to 1600m and winds are expected to be moderate from the southwest.

Avalanche Summary

Reports from Tuesday include several natural 40-60cm thick storm and wind slab avalanche up to Size 3. Recent natural persistent slab avalanche activity was also observed, with a report of a 1-2 day old Size 2, which released well below the top of the south facing start zone, suspected to have run on the early January surface hoar sitting on a crust. A continued cycle of natural loose wet sluffs reaching Size 2 on sun-exposed slopes, as well as cornice collapses, were also reported.

Snowpack Summary

Wet surface snow has refrozen into a supportive crust in most places; however, dry soft snow with new surface hoar growth may be found at treeline elevations on shaded aspects. Storm snow weaknesses down 40-60cm remain sensitive. Avalanche professionals are still monitoring the persistent weakness buried early January, which is now down 80-120 cm. In most places it is no longer sensitive to light triggers. However, in specific locations it still produces hard, but sudden results in snowpack tests.

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