Bollettino valanghe

Banff Yoho Kootenay

Feb 22 – 23, 2014Parks Canada
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Archiviato · scaduto 13 years ago

Pericolo valanghe

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

In sintesi

We are strongly urging people to be very conservative this weekend with their terrain choices. This is due to the nature of the weak layer currently in the snowpack. SH

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    Wind slabs have been forming at higher elevations from SW winds over the last few days.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    2–3
    There is still a poor bond between the storm snow and the Feb.10 layer of facets and surface hoar. This interface is still very susceptible to human triggering.

Weather Forecast

Expect flurries with local amounts of 5cm on Saturday. Temperatures will be in the -15 to -20 range over the weekend. Light gusting moderate NW winds for Saturday.

Snowpack Summary

30-70cm of recent storm snow is settling and overrides the Feb10th interface. A poor bond persists at this interface and many avalanches have been observed on this layer over the past week. Recent SW winds have created wind slabs in lee alpine terrain. These wind slabs are easily triggered and often step down to the Feb 10th interface.

Avalanche Summary

The natural avalanche cycle seems to have subsided, but skier triggered avalanches (up to class 2) were reported in the Lake Louise on Thursday, and two skier remotes were reported on the moraine approach to Peyto Glacier on Wednesday. Avalanche control on Mt. Whymper today produced avalanches to sz 2.5, likely failing on the Feb.10th interface.

Confidence

Due to the number of field observations on Friday

Regioni coperte