Bulletin d’avalanche

Banff Yoho Kootenay

Apr 6 – 7, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Mon
Tue
Alpin
Sans niveau
Limite forestière
Sans niveau
Sous la limite
Sans niveau
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Points saillants

We were seeing some small avalanche activity associated with the new snow and wind on Saturday. It might show up in high couloirs for a day or two still. Watch for outbreaks of sun. It's getting rugged accessing the alpine.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    A hard slab sitting over weak facets up to 60cm down remains a concern where found: mainly on N aspects in the alpine. We have seen a few human triggered avalanches in steep, isolated features such as moraines and glacier rolls over the past week.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5
    This problem is directly related to daytime heating and solar inputs. Even on a cloudy day localized solar effect can quickly change the snow stability. With new snow expected to fall over existing crusts, monitor conditions closely for change.

Weather Forecast

A mix of everything, but a lot of nothing. Beware sudden outbursts of sun, or lee ridgecrests where some windslabs may still be present(N and E).

Snowpack Summary

Up to 15cm recent snow at upper elevations. Melt-freeze crusts are common. On North and East aspects in the alpine, up to 30cm of unconsolidated snow can be found. Below this, a stiff slab overlying weak facets remains a concern in some places and a weak, faceted snowpack, remains a concern in thin areas.

Avalanche Summary

Small slabs and loose dry avalanches were noted up the Icefields Parkway pouring off steep rocky areas to size 1.5. Similarly sized wet avalanches were noted In Yoho.

Confidence

Régions couvertes