Bollettino valanghe

Kootenay Boundary

Dec 15 – 16, 2017Avalanche Canada
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Archiviato · scaduto 9 years ago

Pericolo valanghe

Sun
Mon
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole

In sintesi

A thin cover of new snow now overlies a variety of old surfaces depending on aspect and elevation. As more snow starts to accumulate, investigate how well it's bonding to the old surface before committing yourself.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    The new storm may be easily triggered especially in areas where there has been additional loading from wind.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

SATURDAY: Mix of sun and cloud, flurries. Accumulation trace. Ridge wind light from the northwest. Temperature -6. Freezing level 500 m.SUNDAY: Cloudy, flurries. Accumulation 5-10 cm. Ridge wind moderate from the southwest. Temperature -6. Freezing level 600 m.MONDAY: Mostly cloudy, flurries. Accumulation trace. Ridge wind moderate from the west. Temperature -3. Freezing level 900 m.

Avalanche Summary

There have been no reports of avalanche activity since last weekend when small, loose, dry avalanches were observed from skier traffic in steep terrain on Saturday.

Snowpack Summary

Approximately 5 cm of new snow has fallen on a variety of old snow surfaces dependent on aspect and elevation. On solar aspects a thin melt-freeze crust has been buried. On northerly aspects, feathery, surface hoar crystals (10-30 mm in length) have been buried below treeline as well as protected areas at treeline. In the alpine the old surface consisted of sugary snow (facets) and hard, wind scoured snow. Below the snow surface the upper snowpack is well settled and overlies a series of late-November crusts which is now buried 20-50 cm and is 15-25 cm thick. Recent snowpack tests have produced hard, resistant compression test results within the layers of this crust. Below the crust layer the lower snowpack is moist and well settled.

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