Bollettino valanghe

South Coast

Dec 21, 2016Avalanche Canada
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Archiviato · scaduto 10 years ago

Pericolo valanghe

Wed
Thu
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato

In sintesi

The last few days' new snow sits on a variety of potential weak sliding layers. As the storm snow settles in the coming days, it will be critical to evaluate the bond between new and old snow layers.

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Moist new snow combined with moderate to strong southwest winds have created slabs on top of a variety of potential weak sliding layers.

Confidence

Moderate - Track of incoming weather systems is uncertain

Weather Forecast

Wednesday: Isolated flurries/ Moderate to strong southwest wind / Alpine temperature 0Thursday: Flurries, accumulation 10-15cm / Moderate southwest wind / Alpine temperature 1Friday: Cloudy with some sunny periods / Light north wind / Alpine temperature -3

Avalanche Summary

There are no new recent reports of avalanche activity, however I would suspect there to be continued potential for skier and rider triggering with the recent new snow, strong winds at upper elevations and a possible weak bond at the storm/old snow interface. There was natural avalanche cycle Sunday night into Monday morning with avalanche releases up to size 2. Reports indicated that avalanches to size 1.5 were being easily triggered with ski cuts.

Snowpack Summary

Up to 60cm new moist or wet new snow overlies the variable old snow surface from late last week, which includes well settled snow on southerly aspects, loose snow on shaded aspects, isolated pockets of surface hoar, and sun crusts on steep southerly aspects. With the potential for buried surface hoar means storm snow weaknesses from this latest storm will take longer than normal to stabilize. An old rain crust is reported to be down 150 cm in the North Shore mountains. This layer is still failing on snowpack tests, but is likely difficult to trigger in most places now.

Regioni coperte