Bollettino valanghe

Northwest Coastal

Dec 7 – 8, 2013Avalanche Canada
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Archiviato · scaduto 13 years ago

Pericolo valanghe

Mon
Tue
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

Keep an eye on temperatures on Sunday. We could see an above freezing layer develop, which could unlock the snowpack and increase the potential for rider triggering.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–4
    Stubborn old wind or storm slabs could become more reactive on Sunday if an above freezing layer develops as forecast. Be especially cautious in exposed treeline terrain.

Confidence

Poor - Due to the number of field observations

Weather Forecast

Sunday: A mix of sun and cloud. Temperatures remain cold in the valley bottoms, but an above freezing layer could develop between 1200 and 1800 m. Winds should be moderate from the Northwest. Monday: Mainly cloudy with a chance of flurries. Freezing level remains at valley bottom and winds are moderate to strong from the Northwest. Tuesday: Mainly cloudy with a chance of flurries. Freezing level remains at valley bottom and winds are light to moderate from the W-NW.

Avalanche Summary

No recent avalanches have been reported, but reports are limited.

Snowpack Summary

Snowpack depths are highly variable across the region, with elevation, and in wind-exposed areas. Low-elevation and wind-affected areas have a shallow faceted snowpack. While in higher elevation sheltered areas the recent storm snow is settling and gaining strength; however, weaknesses at the old snow interface down approximately 40cm may still need time to heal. Recent reports suggest this interface is still giving easy compression test results and remains a concern with wind slabs. The lower snowpack is a series of crusts, some of which are laminated with facets, particularly in shallower areas. Facets under the uppermost crust, down approximately 50cm, gave hard sudden collapse compression test results in the Shames area on Sunday. Recent cold and clear weather is promoting surface hoar formation and near-surface faceting.

Regioni coperte