Bollettino valanghe

Banff Yoho Kootenay

Apr 14 – 15, 2019Parks Canada
Vedi sulla mappa
Archiviato · scaduto 7 years ago

Pericolo valanghe

Tue
Wed
Alta quota
Senza grado
Limite del bosco
Senza grado
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

It is still very much winter up high. Storm snow and steady wind over the weekend has created wind-slabs in the alpine. Step back from skiing exposed and committing lines in the alpine until the wind-slabs have settled out.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5
    Recent storm snow (20-50cm) has been redistributed by steady and moderate Westerly wind over the weekend. Some drifts in immediate lees are 100cm deep. Poor visibility has limited specific windslab observations as of Sun afternoon.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–2
    These slabs remain a concern on north aspects in the alpine where March winds built slabs over the facetted snow from February's cold snap. Additionally, there is uncertainty as to how this layer will react with the recent storm snow load.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–1.5
    Recent storm snow has been producing loose dry avalanches from steep terrain. They are small in size and are not running particularly far.

Weather Forecast

Temperatures will remain relatively cool (-5 to -10), even in the valley (4 to -5), for the next few days. Snowfall is supposed to taper off. Convective flurries in localized areas will still be occurring however. The wind will subside to the light range (SW) today and stay there for 48 hours or so.

Snowpack Summary

20 to 50cm has fallen at higher elevations since April 9. The new snow and wind is creating windslabs on lee N and E aspects, some up to 100cm deep in immediate lees in the alpine. Facets 50 to 70cm deep produce hard shears but have not produced an avalanche for a while.

Avalanche Summary

A few small windslabs (size 1) were noted in isolated areas throughout the park today, however visibility was limited. Additionally several dry loose avalanches were observed in steep terrain in the alpine to size 1.

Confidence

Regioni coperte