Bollettino valanghe

Kootenay Boundary

Apr 8 – 9, 2014Avalanche Canada
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Archiviato · scaduto 12 years ago

Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Problemi valanghivi

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Daytime warming may result in loose wet avalanches from steep terrain on solar aspects.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    3–6
    Forecast dropping freezing levels and cooler temperatures over the next few days may result in avalanches failing on this layer to be unlikely. Heavy triggers like cornice falls may result in avalanches stepping down the persistent weak layer.

Confidence

Fair - Freezing levels are uncertain

Weather Forecast

Overnight and Wednesday: Freezing level dropping overnight to 1500 metres. Precipitation starting Tuesday evening. The snow line should descend as the temperatures cool. 5-10 mm of precipitation should be a mix of snow and rain. Winds strong from the Southwest overnight, becoming light Northwest during the day. Mostly sunny with the freezing level rising during the day to 2000 metres.Thursday: Overnight freezing level dropping down to 1500 metres, and then rising up to 2200 metres during the day. Mostly sunny with strong solar radiation and light winds.Friday: Overcast with moderate Southwest winds and some light precipitation.

Avalanche Summary

Some loose wet avalanches up to size 1.5 were reported from Monday on all aspects and at all elevations.

Snowpack Summary

Very warm temperatures at alpine elevations created moist or wet snow on the surface. At treeline the snow is moist down 45 cm and "knife" resistance melt freeze crusts are reported to be breaking down. The late January/early February persistent weak layer is deeply buried and may have resulted in some large avalanches during the last few warm days. Forecast drop in freezing levels should develop new melt-freeze crusts on the surface over the next few days.

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