Boletín de aludes

Sea To Sky

Apr 1 – 2, 2012Avalanche Canada
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Archivado · caducó 15 years ago

Peligro de aludes

Tue
Wed
Alta montaña
4 · Fuerte
Límite del bosque
4 · Fuerte
Bajo el límite
3 · Notable
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Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely
    Tamaño
    1–5
    Forecast strong to extreme winds and heavy snowfall will form reactive and potentially destructive new wind slabs.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–6
    Cornices are very large, potentially unstable and will continue to grow with forecast weather.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–6
    Forecast heavy snowfall will add to an ongoing storm slab problem. Storm slabs may be more destructive than usual, especially if they fail on weak layers buried on March 26th.

Confidence

Good

Weather Forecast

Monday: heavy snowfall continuing overnight into Tuesday - strong to extreme southwest winds - freezing level at 1300m Tuesday: continued heavy snowfall - strong southwest winds decreasing throughout the day- freezing level at 1000m Wednesday: a mix of sun and cloud as a clearing trend develops - light and variable winds - freezing level at 900m

Avalanche Summary

Explosives control on Saturday produced numerous size 1.5-2 avalanches that ran on the March 26th interface. Some of these avalanches ran sympathetically with other slides, or remotely at distances of up to 300m. On the same day, a size 2 skier-triggered windslab avalanche occurred on a southwest aspect at treeline in the Fitzsimmons Range. On Sunday, ski cutting produced numerous size 1-1.5 windslab avalanches that ran within snow that fell over the previous 24hrs. Expect widespread wind and storm slab avalanche activity with potential to step down to the deeper March 26 interface with weather forecast for Monday.

Snowpack Summary

10-15cm of new snow has added to the 75-100cm that overlies surfaces that were buried on March 26. This interface consists of a crust which exists on all aspects except true north facing slopes at treeline and in the alpine, where small surface hoar may be present in sheltered places . This week's snow continues to be redistributed by consistently moderate to strong variable winds, forming windslabs in unsuspecting locations. Below the March 26 interface, the snowpack is well settled and bonded, with further strength gains deeper in the pack. Cornices are huge, and will continue to grow with the forecast weather pattern.

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