Bollettino valanghe

Purcells

Apr 10 – 11, 2013Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 13 years ago

Pericolo valanghe

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

In sintesi

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–5
    New snow and wind have created storm slabs at high elevations. This problem is 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.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–4
    Loose wet avalanches and glide slabs may be especially prone to triggering at low elevations.

Avalanche Summary

Most of the recent avalanche activity has been on high elevation north aspects. Natural and human-triggered (including remotely triggered) slabs failed on surface hoar or storm snow weaknesses during and after last weekend’s storm. A natural avalanche cycle is expected to have occurred on Wednesday, but so far we have no reports from the field.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain for the entire period

Weather Forecast

Thursday: Light snow. Moderate to strong W winds. Freezing level around 1600 m. Friday: Moderate snow, mainly in the afternoon. Moderate to strong SW winds. Freezing level around 1500 m.Saturday: Light to moderate snow. Light W winds. Freezing level around 1700 m.

Snowpack Summary

Additional storm snow has added to an existing storm slab problem above about 2000 m. Winds from the SW through to NW are likely to have created new wind slabs and added to cornices. A buried 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. At lower elevations, rain-soaked snow may be weak when wet.Our stream of snowpack and avalanche observations is diminishing as operators are starting to shut up shop for the season. If you’re out and about, please let us know what you are seeing: [email protected] Thanks!

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