Bollettino valanghe

Banff Yoho Kootenay

Apr 16 – 17, 2023Avalanche Canada
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Archiviato · scaduto 3 years ago

Pericolo valanghe

Tue
Wed
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
Senza grado

In sintesi

Incoming snow and wind will create fresh wind slabs and add load to the deep persistent problem. Step back and monitor how the snowpack adjusts to the change on Monday.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Some new snow (~10CM) and increasing wind with variable direction will likely produce wind slabs in the alpine by Monday morning.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3.5

    The basal facets, as well as mid-pack facets and crusts, remain a significant concern. Many large avalanches in the recent cycle tell forecasters that this problem will be here until the end of the season.

Confidence

Low

Avalanche Summary

No avalanches were observed or reported today. Natural avalanche activity has slowed but we are still able to trigger large avalanches with explosives.

Snowpack Summary

Recent storm snow has settled to 20-30 cm above 2300 m. The storm snow sits over buried sun crusts that are present to ridge crests, and faceted layers on shady aspects. Multiple buried crusts are present in the top 50-70 cm on solar aspects. The basal depth hoar is present at the bottom of the snowpack and remains facetted and weak. Low elevations have a temperature crust on all aspects.

Weather Summary

Snow will start Sunday evening and up to 10cm could arrive by Monday. Temperatures will decrease Monday with the valley remaining around zero degrees and -10 in the alpine. Wind will pick up into the strong range in the early hours of Monday.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.

Regioni coperte