Boletín de aludes

South Rockies

Feb 21, 2017Avalanche Canada
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Archivado · caducó 10 years ago

Peligro de aludes

Tue
Wed
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Lo esencial

Forecast new snow and wind will elevate the avalanche danger on Tuesday.

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2
    Forecast new snow and wind are expected to develop new storm slabs on all aspects. These thin new slabs may be easy to trigger and may slide fast and far due to the underlying crust.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    A weak layer near the base of the snowpack has the potential for large avalanches, especially in areas with minimal rider compaction or thin variable snow cover.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Tuesday

Avalanche Summary

Forecast new snow and wind may develop new storm slabs at treeline and above. These new storm slabs may not bond well to the old surface crust. Also keep in mind that the deep persistent slab problem is a low probability/high consequence scenario that warrants extra caution around large open slopes, especially in shallow snowpack areas.

Weather Forecast

Tonight: 5-8 cm of new snow combined with strong southwest winds and overnight freezing down to valley bottoms. Tuesday: 3-5 cm of new snow with moderate westerly winds and daytime freezing up to 1500 metres. Wednesday: Chance of flurries with moderate southwest winds and alpine temperatures around -8. Thursday: 3-5 cm of new snow with light northeast winds and alpine temperatures around -15.

Snowpack Summary

Forecast new snow and wind may develop new storm slabs. These new storm slabs may add to the recent snow that sits above a thick rain crust below 1900 m. A stiff midpack sits above weak sugary snow near the ground. This deep persistent weakness is primarily a concern in shallow snowpack areas. Watch this video from the South Rockies field team for some recent test results on this layer.

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