Bollettino valanghe

Lizard-Flathead

Mar 14 – 15, 2018Avalanche Canada
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Archiviato · scaduto 9 years ago

Pericolo valanghe

Fri
Sat
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

Variable amounts of new snow are expected across the region, mostly at treeline and alpine elevations.  Treat the hazard as higher if local snow amounts are substantially more than forecasted.

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Forecasted snowfall amounts are variable across the region. Assess the snow accumulation and treat the hazard as higher if local amounts exceed 20 cm.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

THURSDAY:  Cloudy with light snowfall, accumulation 5 to 15 cm, light northwesterly winds, alpine temperature -1 C, freezing level 1400 m.FRIDAY:  Cloudy with light snowfall, accumulation 1 to 3 cm, light southwesterly winds, alpine temperature 0 C, freezing level 1400 m.SATURDAY: Cloudy with light snowfall, accumulation 5 to 10 cm, light to moderate northeasterly winds, alpine temperature -1 C, freezing level 1200 m.

Avalanche Summary

Widespread loose wet avalanche activity to size 1.5 was observed on southerly slopes on Tuesday.  Loose wet avalanche activity is expected to reduce with the cooling temperatures.

Snowpack Summary

New snow will fall on a melt-freeze crust produced with the recent warm air temperatures, sun, and rain.  On shady aspects at high elevations, new snow may fall on lingering wind slabs in lee features and loose dry snow in sheltered features.Deeper in the snowpack, the mid-December and late November weak layers are composed of crusts and sugary facets, which are down 200-300 cm. These layers have been dormant but may be awoken by a large trigger, such as a cornice fall.

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