Bollettino valanghe

South Columbia

Apr 11 – 12, 2013Avalanche Canada
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Archiviato · scaduto 13 years ago

Pericolo valanghe

Sat
Sun
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–5
    Storm slabs are of most concern on wind-loaded slopes, and on high-elevation northerly aspects, where a buried layer of surface hoar may create surprisingly large avalanches.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain on Friday

Weather Forecast

The timing and intensity of the next frontal system (Friday/Saturday) is uncertain.Friday: Mainly cloudy, with moderate snow starting in the evening. Moderate to strong SW winds. Freezing level around 1300 m.Saturday: Overnight snowfall tapering off to a cool and unsettled flow with light to moderate snow. Strong SW winds easing. Freezing level around 1300 m.Sunday: Cold and unstable weather, with light snow. Freezing level around 1000 m.

Avalanche Summary

A natural avalanche cycle occurred on Wednesday in response to storm loading. Observations were limited, but initial reports are of several size 1-2.5 avalanches at treeline and alpine elevations.

Snowpack Summary

25-40 cm recent storm snow and moderate to strong winds have created new storm slabs and wind slabs at alpine and treeline elevations. A surface hoar interface is now buried within the upper metre or so of the snowpack, mainly on high-elevation northerly aspects. It may be slowly gaining some strength, but these slopes should still be treated with suspicion. On other slopes, recent storm snow overlies a crust, with a variable bond. At low elevations, rain-soaked snow will become strong once refrozen.

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