Bollettino valanghe

Northwest Coastal

Dec 27 – 28, 2012Avalanche Canada
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Archiviato · scaduto 14 years ago

Pericolo valanghe

Sat
Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–4
    Wind slabs have formed in response to down-valley winds. These may be hard to spot where they are buried with new snow.

Confidence

Fair - Intensity of incoming weather is uncertain for the entire period

Weather Forecast

Friday: Moderate SW winds. Alpine temp around -6. Light snow. Saturday: Light to moderate NW winds. Freezing level at valley bottom. Very light snow.Sunday: Moderate SW winds. Freezing level at valley bottom. Light snow starting late in the day.

Avalanche Summary

A skier triggered a small hard wind slab on a steep north-facing roll near treeline on Tuesday. No avalanches have been reported since then.

Snowpack Summary

Light new snow is landing on variable surfaces including wind slabs and surface facets. Some alpine slopes are heavily scoured. Cornices are fragile. A layer of surface hoar buried in the upper metre of the pack has been observed in the Shames backcountry. The mid-pack is generally well settled. Near the base of the snowpack, a crust/facet layer sometimes gives hard, sudden results in snowpack tests. This weakness is unlikely to be triggered by a single person, but it remains possible with a very heavy load (e.g. cornice fall) or from a thin-spot trigger point.

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