Bollettino valanghe

Banff Yoho Kootenay

Dec 24 – 25, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

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

In sintesi

The natural cycle is tapering off, however, the weak layers in the snowpack are still reactive. Don't expect conditions to improve quickly and adjust your terrain decisions accordingly.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Fresh wind slabs from strong winds over the last 2 days have formed within the new storm snow. These will be most prevalent in the lee of features and may stay reactive over the next couple of days.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2.5
    The Dec. 10 persistent layer of facets and surface hoar is now buried 40 - 80cm. Avalanches have either been independently running on this layer, or stepping down to the basal weakness.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1.5–3
    Recent snow has now overloaded the Oct. 26 deep persistent layer of facets and depth hoar, and there is enough mass now to cause large avalanches.

Weather Forecast

Lows in the mid teens are expected over the next few days. High overcast skies will at times produce very light amounts of snow (trace). Winds are dropping and it is expected to be calm on Christmas Day.

Snowpack Summary

An average 40-80 of recent storm snow with variable wind effect now sits over the Dec. 10 facet/surface hoar interface. This layer is producing snowpack test results in the hard range. In many areas the lower snowpack is weak with the October 26 depth hoar, facets and crust near the base. Snow pack depths range from 90-160 cm at ~2000 m.

Avalanche Summary

The natural avalanche cycle has started to taper off with the cooler temperatures. Large avalanches to size 3 have been noted in the last few days.

Confidence

Regioni coperte