Bollettino valanghe

Waterton Lakes

Dec 28 – 31, 2019Parks Canada
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Archiviato · scaduto 7 years ago

Pericolo valanghe

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

In sintesi

Natural activity has tapered off but the potential for large avalanches running to the valley bottom remains. These could be triggered by cornices, small avalanches or humans in the wrong spot.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Wind slabs will be thicker and more reactive the higher you go. Snow amounts increase dramatically above 1800m.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3

    As natural activity on this layer begins to slow down, it is tempting to believe the problem has passed. This layer could still be triggered by people in thinner snowpack areas, or by large triggers including cornices or smaller avalanches.

Snowpack Summary

The snowpack is thin below 1800m and capped by a met freeze crust. Above 1800m, 85-120cm of snow from last weeks storm sits on top of a weak facet/crust combo. The front ranges hold a thinner, more wind affected, snowpack.

Avalanche Summary

A widespread natural cycle occurred last weekend, with avalanches to size 2 in the storm snow and some larger ones failing on deep persistent weak layers. A size 3 natural avalanche occurred on Mt Bertha Sunday Dec 22 covering the Bertha Falls trail in debris, and a similar avalanche was seen on Mt. Crandell.

Confidence

Due to the number of field observations

Weather Forecast

Saturday- Sunny with cloudy periods. West  wind 20-40km/h with gusts up to 60km/h.  Freezing Level valley bottom.

Sunday-  Flurries throughout the day. 1-5 cm of accumulation. Freezing Level 1300m. Moderate West -SW winds

Monday-  A mix of Sun and Cloud. Freezing Level valley bottom. Moderate West winds.

Regioni coperte