Bollettino valanghe

South Coast Inland

Dec 20, 2016Avalanche Canada
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Archiviato · scaduto 10 years ago

Pericolo valanghe

Tue
Wed
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
3 · Marcato

In sintesi

There is a wide variation between forecast snowfall amounts and temperatures in the north and south of the region. Danger ratings as seen here are for anticipated higher snowfall and warmer temperatures  anticipated in the south.

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    Continued new snow accumulation over the past 2 days combined with moderate to strong southwest winds have created slabs on top of a variety of potential weak sliding layers.

Confidence

Moderate - Forecast snowfall amounts are uncertain on Tuesday

Weather Forecast

Tuesday: Snow Monday night into Tuesday, accumulation in the north 10-20cm and in the south 20-30cm / Moderate to strong southwest wind / Alpine temperature -4 in the north and -1 in the southWednesday: Mainly cloudy with flurries / Moderate to strong southwest wind / Alpine temperature -8 in the north and -4 in the southThursday: Periods of snow / Moderate to strong southwest wind / Alpine temperature -5

Avalanche Summary

Expect avalanche activity to stay on the rise with continued new snowfall accumulating Monday night through into Tuesday combined with moderate to strong wind and warming temperatures.

Snowpack Summary

30-50cm new snow overlies the previous variable snow surface from last week, which includes hard wind pressed or scoured areas, old wind slabs, weak faceted snow, or surface hoar. New wind slabs that have formed in response to southwest winds. In the Duffey Lake area, recent snowpack tests gave moderate sudden planar results down 36 cm on buried surface hoar. The widespread mid-November crust is typically down approximately 1 metre. Recent snowpack tests have shown the crust to be unreactive, but it could become a problem in shallow alpine start zones.

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