Bollettino valanghe

Kananaskis

Feb 7 – 8, 2015Alberta Parks
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Archiviato · scaduto 12 years ago

Pericolo valanghe

Mon
Tue
Alta quota
4 · Forte
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato
Apri la mappa completa

In sintesi

A natural avalanche cycle is still ongoing in Alpine areas.  Cornices are large and failing in the warm temperatures triggering avalanches up to sz 3 on underlying slopes. 

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–4
    New windslabs are building in Alpine terrain and open areas at treeline.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2–4
    Cracking and whumpfing was being observed on Saturday in open wind affected areas. 

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    3–6
    A few avalanches recently stepped down to this interface (the November rain crust) causing larger avalanches.

Weather Forecast

Temperatures are going to cool slightly over the next few days with freezing levels forecast to drop to 1700m.  There may be a few isolated flurries but little accumulation is expected.  Winds will continue to be moderate at higher elevations out of the SW.

Confidence

Good

Avalanche Summary

Numerous natural avalanches were observed throughout the day on Saturday.  Many of these slides were sz 1.5-2 and failing within the storm snow but there were also a few larger slides, likely triggerred by Cornice failures that were failing down deeper in the snowpack producing size 3 avalanches.  Most of these slides initiated in Alpine terrain and ran to the middle of their normal runouts.

Snowpack Summary

Up to 50cm of recent snow is overlying the 0131crust which continues to produce moderate to easy sheers on a layer of facets overlying the crust..  The 0131crust is being found up to 2900m on steep solar aspects and only up to 2200m on more polar aspects.  Warm temps, combined with the recent new snow and winds are building new windslabs and storm slabs that are skier triggerrable.  Some recent slide activity has shown evidence of stepping down to deeper layers such as the Dec 13th crust as well as the November rain crust way down in the snowpack.

Regioni coperte