Bollettino valanghe

Northwest Coastal

Jan 12 – 13, 2015Avalanche Canada
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Archiviato · scaduto 12 years ago

Pericolo valanghe

Wed
Thu
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole

In sintesi

The December week may still be reactive to moderate loads. Continue to make conservative choices as the new snow with wind comes into the region.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–3
    Moderate to strong S-SW winds will build windslabs in lee features, especially N and NE facing terrain.
  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–5
    A small avalanche or cornice failure could produce enough force to trigger this buried weak layer.

Confidence

Good - Intensity of incoming weather systems is uncertain

Weather Forecast

A weak upper level trough will arrive on the coast on Monday bringing flurries to the region. As the trough moves inland on Tuesday, the North coast may see up to 25 cm of snow at higher elevations, and the possibility of rain up to 1500m. Winds will be light to moderate from the south throughout the forecast period. Wednesday will see a bit of clearing before the next pulse of moisture arrives later in the day. Freezing levels around 500m until Wednesday, when they will spike to 2000m before coming back down on Thursday.

Avalanche Summary

No avalanches reported yesterday.

Snowpack Summary

Strong winds have redistributed the recent storm snow, and rain in some areas has produced a surface crust layer that will be of concern with future snow loading. A buried surface hoar layer in the mid-snowpack is still on the radar in some northern sections , and the mid December crust can still be found in the middle of the snowpack. This layer has been reported to be sandwiched between facets and surface hoar in some places. The November crust near the bottom of the snowpack is generally well bonded but may still be reactive in areas with shallow snowpack.

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