Bollettino valanghe

Banff Yoho Kootenay

Nov 26 – 27, 2012Parks Canada
Vedi sulla mappa
Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

There is still a chance of triggering a large slide in the right terrain feature as wind loading and settling stiffen up the slab. Stick to moderate terrain and travel is good. JBW

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    20-40 cm thick soft and hard slabs, reactive to explosives and ski cuts and restricted mostly to immediate lee of ridge crests or in open areas Somewhat isolated and stubborn to trigger

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    The load on this layer is in the critical range. Open areas at treeline have just enough stiffness in the slab to have the potential for deep triggering and propagation. Several Na, skier and explosive avalanches up to size 2.5 in the last 36 hrs.

Weather Forecast

Little in the way of precipitation for Monday. Skies become cloudy and then a chance of flurries and some moderate accumulations through midweek with a westerly flow. Artic front and some upslope by Thursday.

Snowpack Summary

Still very little wind effect in last weeks storm. Storm snow is approx. 40 cm. Stellar layer under Hst down approx 30-50 and Noc Cr down 60-80 are major layers. Relatively well settled snowpack for end of November.

Avalanche Summary

Avalanche control in Yoho on Bosworth and Stephen produced thin storm snow slabs up to size 2 none stepping down. Wind loading on NE face of Rundle produced a size three natural likely on Nov crust.

Confidence

Intensity of incoming weather systems is uncertain

Regioni coperte