Bollettino valanghe

Kootenay Boundary

Feb 20 – 21, 2014Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 13 years ago

Pericolo valanghe

Sat
Sun
Alta quota
4 · Forte
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato
Apri la mappa completa

In sintesi

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    3–6
    Expect the deeply buried weak layer to continue to produce very large and destructive avalanches. Each load of new snow adds to the storm slab above the weak layer.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    3–5
    Storm slab avalanches are expected to continue to release naturally at higher elevations and where the wind has transported snow. The storm snow may be very sensitive to human triggers at all elevations. Remote triggering is a concern.

Confidence

Fair - Forecast snowfall amounts are uncertain on Friday

Weather Forecast

Overnight and Friday: Light to moderate snowfall overnight bringing 5-10 cm of snow by morning. Freezing level dropping to valley bottoms overnight. Strong Westerly winds overnight becoming moderate Northwest during the day.Saturday: Broken skies with sunny periods and a chance of light flurries. Light Northwest winds.Sunday: Mostly cloudy with light snow and moderate Northwest winds. Alpine temperatures around -15.

Avalanche Summary

Widespread natural slab avalanche activity up to size 3.0 on all aspects and elevations. Remote triggering and long fracture propagations continue. Endless settlements and whumphing experienced while traveling on low angle terrain. Low elevation cut-blocks are releasing naturally at the February 10th interface.

Snowpack Summary

There is over a metre of recent storm snow that is sitting on a weak layer that is a mixture of facets, surface hoar, and melt-freeze crusts. The weak layer is widespread at all elevations and aspects. The storm slab continues to settle and become more cohesive allowing for longer fracture propagations and remote triggering. This persistent weak layer is expected to be a concern for some time; at least through the weekend.

Regioni coperte