Bollettino valanghe

Northwest Inland

Feb 21 – 22, 2016Avalanche Canada
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Archiviato · scaduto 11 years ago

Pericolo valanghe

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

In sintesi

A couple of recent deep slab avalanches in the north of the region are keeping Alpine danger ratings elevated.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Reactive slabs may be found on freshly wind loaded alpine features. Smaller avalanches have the potential to step down to buried week layers.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    3–6
    Several buried weak layers remain a concern. Surface hoar can be found in many areas while several large avalanches have recently released on facets near the ground further north.

Avalanche Summary

A couple skier triggered wind slab avalanches were reported on Saturday. In the north of the region, deeply buried persistent weak layers in the alpine have recently woken up with several large avalanches releasing on basal facets in the last week. This weak layer has be reactive to skier triggering from a thin spots or heavy triggers such as a smaller avalanches and cornice failure.

Confidence

Moderate

Weather Forecast

MONDAY: light flurries overnight becoming mainly cloudy through the day, moderate westerly winds, freezing level 1000m. TUEDSAY: partly cloudy, moderate southerly winds, freezing level 800m. WEDNESDAY: partly cloudy, moderate westerly winds, freezing level 1200m.

Snowpack Summary

Settling storm snow overlies a melt freeze crust buried on February 12th that extends up to around 2000m elevation. This snow is reported to be bonding well to the crust. Moist snow can be found at lower elevations and on slopes that see direct sun. Recent winds have redistributed the surface snow at higher elevations. Older wind slabs can be found on east aspects while reverse loading may have loaded lee features on the west.  The early January surface hoar/facet layer can be found between 50cm and 1m down and remains a concern. This layer seems the most reactive in the north of the region but may still be a problem in the south as well. Shallow snowpack areas in the east and north of the region have a weak base layer of facetted snow on or just above the ground.

Regioni coperte