Bollettino valanghe

Banff Yoho Kootenay

Apr 22 – 23, 2015Parks Canada
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Archiviato · scaduto 11 years ago

Pericolo valanghe

Fri
Sat
Alta quota
Senza grado
Limite del bosco
Senza grado
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

Cooler temperatures forecasted for the next few days with a valley bottom freeze tonight. We should see wet avalanche activity taper off tomorrow.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Cornices failures, combined with the hot temperatures, have the possibility to triggering the deep basal layers.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    While the forecast suggests slightly cooler temps with cloud cover, any short burst of solar energy late in the day will induce wet avalanches.

  • Wet Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3
    Wet slabs have been occurring in the heat of the day late afternoon-evening. They are mostly failing on a layer 40-60 cm down or in some cases scrubbing down to the ground.  It will become less reactive with the cooler temperatures forecasted.

Weather Forecast

Valley bottom freezing levels forecasted for tonight with clear skies, except for along the Wapta where mainly cloudy skies are expected. Thursday will be a mix of sun and cloud with alpine highs around 0 with light west wind. The couple of days will be cooler than Monday and Tuesday.

Snowpack Summary

Supportive crust on solar aspects in morning which are deteriorating by mid day. High elevation north aspects still have dry snow. Mid pack is well settled with no significant shears. The basal facets remain the main weakness in the snowpack, but we expect only large loads or a dramatic rise in temperatures to cause failures on this layer.

Avalanche Summary

A natural wet slab avalanche cycle occurred on all aspects at treeline and above late Tuesday afternoon and into the evening . Slabs were up to size 3 and were 40-60 cm deep.

Confidence

Regioni coperte