Bollettino valanghe

Waterton Lakes

Jan 30 – Feb 2, 2016Parks Canada
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Archiviato · scaduto 11 years ago

Pericolo valanghe

Sat
Sun
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole

In sintesi

Last weeks Chinooks decimated the snowpack in much of our forecast area. The new snow is being accompanied by strong westerly winds, but should provide for some good skiing in sheltered areas near the divide.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–3
  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–3

Weather Forecast

A couple of weak fronts (warm followed by cold) will bring snowfall of up to 10cm Friday night into Saturday morning accompanied by cooling temperatures.  Unsettled conditions will persist through the weekend in the wake of these fronts, with cloudy skies, cool temps, variable light to moderate winds and scattered flurries through Monday.

Snowpack Summary

Up to 12mm of precip fell Thursday, accompanied by freezing levels dropping from 2200m to valley bottom and strong westerly winds.  This over firm surfaces previously affected by Strong to Extreme Chinook winds and warm temperatures.  Two PWLs linger as a concern; a layer of crust or surface hoar down 40-70cm, and a crust facet layer down 70-120cm.

Avalanche Summary

Several loose wet avalanches up to size 1.5 were observed on Thursday below 2200m.  An isolated size 2.0 natural slab avalanche (likely a fresh windslab) was observed Friday morning from a steep Easterly alpine slope.  Neighboring ski operations have reported isolated large deep persistent slab avalanches failing on the Dec. 9th crust recently.

Confidence

Regioni coperte