Boletín de aludes

Purcells

Jan 10 – 11, 2016Avalanche Canada
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Archivado · caducó 11 years ago

Peligro de aludes

Tue
Wed
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil

Lo esencial

Some snow in the forecast this week. Check back for updates as the storm progresses.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    Wind slabs may be lurking behind ridges and ribs.
  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    2–4
    A low probability/ high consequence persistent slab problem still exists. Investigate your local snowpack.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

Dry conditions persist on Monday, before a Pacific system brings light snow on Tuesday and Wednesday. Tues: 2-5 cm, Wed: 5-10 cm. Winds are expected to be moderate from the SW and the freezing level remains at valley floor. For more details check out https://avalanche.ca/weather.

Avalanche Summary

A cycle of naturally-triggered size 1-2 loose dry avalanches was reported on Friday. Most were on steep alpine shady aspects.

Snowpack Summary

Conditions are variable across the Purcells. Isolated wind slabs may be lurking behind ridges and ribs. Wind slabs or loose dry snow overlie old surfaces including surface hoar, near surface facets, and possible sun crusts on steep southerly aspects. Cold and dry weather is drying out the upper snowpack (through faceting). In parts of the Purcells, two prominent layers of surface hoar are reactive in snowpack tests. These are buried down 25-60 cm and may have a cohesive slab above. Shallow snowpack areas and moraine features may also have weak facetted snow near the ground that will require time and some warming to strengthen.

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