Boletín de aludes

South Coast

Mar 29 – 30, 2014Avalanche Canada
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Archivado · caducó 13 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Lo esencial

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–4
    Watch for fresh sensitive wind slabs, which should be most problematic immediately lee of ridge crest and mid slope features. The new snow will need another day or two to settle before we start to think about more committing objectives.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    3–6
    Two deep weak layers exist in the snowpack. These weak layers could be activated by cornice fall, a surface avalanche in motion, or a rider finding the sweet spot, likely near a rock outcropping, or anywhere the snowpack goes from thick to thin.

Confidence

Fair - Forecast snowfall amounts are uncertain on Saturday

Weather Forecast

Synopsis: A weakening upper trough stalled off the southern BC coast should continue to deliver light snowfall Saturday night and scattered very light snowfall on Sunday. Look for gradual clearing on Monday.Saturday Night: Precipitation: 1 - 6mm | 2 - 10cm; Wind: Treeline: Light, SW | Ridgetop: Moderate, SWSunday: Freezing Level: 1100m - 1200m; Precipitation: 0-2mm | Trace; Wind: Treeline: Light, SW | Ridgetop: Light, SWMonday: Freezing Level: 1300 - 1600m; Precipitation: Nil; Wind: Treeline: Light, SW | Ridgetop: Light, WTuesday: Freezing Level: 1200 - 1700m Precipitation: Nil; Wind: Treeline: Light, Variable | Ridgetop: Light, NW

Avalanche Summary

Avalanche activity on Friday was limited to point releases out of north facing terrain at treeline which resulted in loose snow avalanches to size 1.

Snowpack Summary

On Friday night 10 - 25cm of new snow fell accompanied by strong southerly winds. There may be some areas where the recent snow does not bond well to melt-freeze crusts on solar aspects. The persistent weak layers from early March and early February continue to be a concern. The March weak layer of wind-scoured crusts, melt-freeze crusts, and/or surface hoar is reported to be down 60 - 100cm. The February crust/facet/surface hoar layer is now deeply buried down 150 - 250cm and may still be triggered by heavy loads like cornice falls or storm slab avalanches in motion. Long fracture propagations resulting in very large avalanches are possible with this layer. Avalanches releasing on these layers may step down to the ground during periods of strong solar radiation or warm spring rain.

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