Bollettino valanghe

Banff Yoho Kootenay

Feb 6 – 7, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 9 years ago

Pericolo valanghe

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

In sintesi

Conditions are touchy right now. Somewhere between High and Considerable and forecasters are debating which category they fall into. Regardless, it is a good time to stay out of avalanche terrain!

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    2–3.5
    Three weak layers exist in the upper snowpack: Jan 16, Jan 6, and Dec 15. All are a mix of sun crust, surface hoar and facets depending on the aspect and elevation. 50-100 cm of snow over the last week has overloaded these layers.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    20-40cm of storm snow (and wind) has developed a slab at higher elevations. If triggered this layer has the potential to step down to deeper instabilities. Continue to make conservative route choices.

Weather Forecast

Tuesday should be mostly clear with light winds. The next storm is moving in Wednesday/ Thursday with 20-30 cm 's of snow, rising temps and strong west winds. We expect the danger to rise significantly at that time.

Snowpack Summary

20 - 30 cm of low density snow with little wind sits on the surface. The main concern in the snowpack lurks below and continues to be the 3 persistent weak layers of surface hoar and/or facets that are found between 50 and 100cm down. We continue to observe sudden test results, whumphing and large propagations on these layers.

Avalanche Summary

Forecasters remote triggered a size 2.5 today on the Icefields Parkway. They triggered it from ~ 50m away on a low angle ridge. The slide was ~ 300m wide, 80 cm deep and slid on a well preserved surface hoar layer (Jan. 6th). A solo skiier in the Lake Louise backcountry had a very close call today when he triggered a size 2 and was partially buried

Confidence

Intensity of incoming weather systems is uncertain on Wednesday

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