Boletín de aludes

South Rockies

Dec 31, 2011 – Jan 1, 2012Avalanche Canada
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Archivado · caducó 15 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    2–4
    Wind slabs can be found on North-Southeast aspects. Cross-loading is possible on open slopes oriented parallel to the wind. You may find wind slabs further down the slope or on open wind exposed areas below treeline.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    3–5
    Warm temperatures may consolidate the snow above the surface hoar into a slab that may propagate wide avalanches.

Confidence

Fair - Forecast snowfall amounts are uncertain on Tuesday

Weather Forecast

The weak ridge that brought cooler and drier conditions on Saturday is expected to be pushed out of the region by Sunday morning. Warm moist air should bring cloud and rising freezing levels to about 1000 metres on Sunday. The winds are expected to build from the southwest on Monday, and moderate precipitation should start to accumulate snow by late afternoon. A trailing cold front is forecast for Tuesday. Snowfall amounts are un-certain and will depend on how much moisture is in the area when the cooler air arrives.

Avalanche Summary

Skiers remotely triggered a size 2.0 slide from 10 metres away, that was 60 cm deep, 70 metres wide, and 75 metres in length. Natural avalanche activity reported today was limited to a natural wind slab release size 2.5 from an North-East aspect. We continue to get reports of old activity that occurred during the recent storm.

Snowpack Summary

Tests in Hartly Creek today showed easy results down 20 cm on a layer of stellar crystals. Height of snow in the Koko Claims area is 120 cm at 200 metres. The mid-december surface hoar is down about 30 cm. The mid-pack is generally well consolidated, and there is a 20 cm layer of 4F facets and depth hoar at the ground. The surface hoar is producing easy to moderate shear test results.

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