Bollettino valanghe

Banff Yoho Kootenay

Jan 16 – 17, 2013Parks Canada
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Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

Alpine lee areas are becoming loaded from recent strong wind. A small avalanche cycle has subsequently ensued. See photo of preserved surface hoar (Jan 6 layer).  en francais

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    Recent wind loading have created new wind slabs, predominantly in the alpine. They will certainly be reactive to riders and climbers.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3
    Beware of open areas at tree-line. Surface hoar is well preserved in sporadic locations. See picture from our Vermillion study plot.

Weather Forecast

Warm temps and strong winds from the NW will increase the danger rating to considerable tomorrow. The winds will subside and then pick up again on Thursday. However, at this time much of the snow will have already been transported.

Snowpack Summary

30 to 50cm of snow sit over the Jan 6th interface. Today, in Kootenay, the Jan 6 interface was well preserved surface hoar between 3 to 5mm in size. Snowpack tests provided easy shears. The slab characteristics were 'sudden planar', or rather, the column popped out like a cash register drawer. No other significant shears were noted.

Avalanche Summary

Several avalanches were observed in the alpine from recent wind loading from the NW. These observations included Mt. Hector, Observation Peak as well as other locations. The avalanches were between size 1.5 and 2.

Confidence

Regioni coperte