Bulletin d’avalanche

Kootenay Boundary

Feb 4, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

The story for the next few days will be the colder weather, however continue to consider the reactivity of recently buried weak layer.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Shifting winds will redistribute last week's new snow onto a variety of aspects.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    There is a layer a layer of weak feathery surface hoar 20-40 cm below the surface and another 40-80 cm down. The former is currently reported to be most reactive, especially where it is sitting on a hard crust.

Confidence

High - The weather pattern is stable

Weather Forecast

SUNDAY Night: Mainly cloudy with scattered flurries, moderate northeast wind, alpine temperature -17 C.MONDAY: Mix of sun and cloud, light to moderate northeast wind, alpine temperature -12 C.TUESDAY: Mix of sun and cloud, light northeast wind, alpine temperature -13 C.WEDNESDAY: Mix of sun and cloud, light northwest wind, alpine temperature -15 C.

Avalanche Summary

Reports from Saturday include several natural size 1.5-2 storm slab avalanches and explosives triggered size 2-2.5 storm slab avalanches on southerly and northerly aspects up to 2200m. Additionally, there were several observations of naturally triggered size 2 wind slab avalanches on northerly aspects in the alpine.

Snowpack Summary

10-30 cm of new snow sits on variety of snow surfaces, which may include wind crust in wind exposed areas, a crust on solar aspects to mountain top and weak feathery surface hoar in sheltered areas treeline and below. In some places this surface hoar is reported be sitting on a crust.40-80 cm below the snow surface, expect to find another crust on south aspects and another layer of feathery surface hoar crystals in sheltered and shaded areas. This deeper layer of surface hoar may be most reactive at treeline elevations on shady aspects. The remainder of the snowpack is generally well-settled and strong.

Régions couvertes