Boletín de aludes

Purcells

Feb 18 – 19, 2012Avalanche Canada
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Archivado · caducó 15 years ago

Peligro de aludes

Mon
Tue
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Fri/Sat winds were out of the S, SW. Winds should switch to the NW Sun. This combination has made for thin windslabs in wind exposed terrain features.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    3–7
    Although a deep persistent slab would most likely require a large trigger (such as cornice fall), they are still possible; especially in thin snowpack areas or in unsupported, rocky terrain.

Confidence

Good

Weather Forecast

We're entering a more active pattern which should persist through the middle of next week.Sun: A ridge of high pressure rebuilds during the day allowing temperatures to cool slightly while winds ease and switch from the SW to NW. A bit of instability from Saturday's storm will produce the odd flurry, but skies should clear in the afternoon. Look for 1500m temps to climb to -2 during the day.Mon/Tue: A few weak systems pass over the region favoring west slopes. Nothing in the flow is particularly well organized, it's the kind of setup that has the potential to bring 2-4 cm a day. Precip totals will be quite variable throughout the region, favoring the west slopes. 1500 m temps: High -3, Low -7

Avalanche Summary

No new avalanche activity reported Thursday or Friday.

Snowpack Summary

Widespread surface hoar has been buried by 5 - 10 cm of new snow in most of the region. The exception is terrain closer to the bugs where the interface is down 20-40cm. A melt-freeze crust has developed on southerly aspects at all elevations. North and east aspects continue to have dry snow and some surface sloughing in steep terrain. Basal facets have not been reactive, but operators continue to monitor this layer in tests. Triggering this deep persistent weak layer is unlikely, but shallow snowpack areas or shallow weak areas adjacent to deeper wind loaded slopes are suspect locations.

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