Bollettino valanghe

South Coast Inland

Jan 26 – 27, 2019Avalanche Canada
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Archiviato · scaduto 8 years ago

Pericolo valanghe

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

In sintesi

Continue to think about and observe for signs of the lingering weak layer buried in our snowpack.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Around 30 to 60 cm of snow sits above a weak layer of surface hoar. This layer is likely best preserved in shaded and sheltered areas between 1700 m and 2100 m. Where it exists, it could still be triggered by humans.

Confidence

High -

Weather Forecast

SATURDAY NIGHT: Partly cloudy, freezing level dropping to 1500 m.SUNDAY: Mostly clear skies, moderate northwest winds, alpine temperature near -2 C, freezing level 1400 m.MONDAY: Increasing clouds over the day, light northwest winds, alpine temperature -3 C, freezing level below valley bottom.TUESDAY: Mostly clear skies, light northwest winds, alpine temperature -1 C, freezing level below valley bottom with inversion conditions possible.

Avalanche Summary

On Friday, One small slab avalanche was triggered by a skier on the surface hoar described in the Snowpack Summary was triggered by a skier. Otherwise, small loose wet avalanches were observed. Check out the following MIN reports for other recent reports of avalanches on the surface hoar: here and here.

Snowpack Summary

On the snow surface, you will likely find a sun crust on south aspects but still dry snow on northerly aspects. Beneath this, around 30 to 60 cm of snow sits on a sun crust on southerly aspects, a temperature crust below around 1700 m on all aspects, and feathery surface hoar in areas sheltered by the wind at all elevation bands. The surface hoar may be most pronounced on west, north, and east aspects below 2100 m.Below this, the snowpack is generally well-settled. In certain parts of the region, you may still find a weak layer of surface hoar buried about 60 to 120 cm in sheltered areas around treeline. There haven't been any recent avalanches on this layer but the likelihood of triggering it may increase this weekend with warm air temperatures.

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