Boletín de aludes

Northwest Inland

Dec 7 – 8, 2012Avalanche Canada
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Archivado · caducó 14 years ago

Peligro de aludes

Sun
Mon
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–4
    New windslabs have formed in the lee of terrain features.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–6
    Deeply buried facet/crust weaknesses are often prone to remote triggering and step down avalanches. Typical trigger points include thin rocky areas. They may be difficult to trigger, but deep persistent slab avalanches are often very large.

Confidence

Poor - Due to limited field observations for the entire period

Weather Forecast

Saturday: The effects of a weak ridge of high pressure will be brief. Generally broken skies with little to no precipitation for most of the day with a warm front pushing in for the late afternoon. Light amounts of snow are expected for the overnight period into Sunday. Winds northwest 20 km/h for the daytime period changing to west 30-50km/h in the late afternoon. Alpine temperatures -8. Sunday: Light to moderate precipitation throughout the day with strong northwesterly winds. Alpine temperatures -4 degrees. Monday: Continued light to moderate precipitation with southwesterly winds 30km/h. Freezing levels expected at 800m with alpine temperatures -6 degrees.

Avalanche Summary

There is no new avalanche activity to report at this time. If you have been traveling in the backcountry recently, send us your observations. Every bit of information helps us to produce a better product. Email us at [email protected]

Snowpack Summary

Wind slab instabilities exist in the upper snowpack at treeline and in the alpine. Treeline snow depths range between 90-125 cm. Snow depths in the alpine are highly variable with deep wind drifts and heavily scoured slopes in exposed areas. A layer of small surface hoar crystals exists at tree-line in isolated sheltered areas. This is most likely buried down 15-20 cm under recent storm snow. A weak layer of facets sitting on a crust exists near the base of the snowpack down 80-130 cm. Test results on this layer earlier this week produced hard, sudden results.

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