Bulletin d’avalanche

Banff Yoho Kootenay

Mar 31 – Apr 1, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Tue
Wed
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Cooler and party overcast conditions kept the snow surface cool on Sunday with a few cm of new snow from convective clouds. Looks like the same pattern in the forecast for Monday.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–2
    Dry snow remains on alpine, north aspect slopes. We have not seen an avalanche on problem this for a while, but if anywhere could release a dry slab it would be here. Approach this terrain carefully.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5
    Start early and finish early (be done by early afternoon). Once the day begins to warm up, avoid any gully features where wet snow may run.

Weather Forecast

Monday looks like it will bring a mix of sun and clouds with temperatures reaching +7 in the mid-afternoon and no new precipitation. Convection (towering cumulus clouds) can sometimes deposit snow in short, powerful bursts as was the case on Sunday.

Snowpack Summary

The snow surface is melt-freeze crust on all areas except alpine and treeline north and east aspects where up to 20 cm of soft snow remains from several days ago. By early afternoon the surface crusts are softening with daily warming. There is lingering concern for a buried facet layer in the upper 30 cm of the snowpack on alpine N aspects.

Avalanche Summary

No new avalanches were observed today. There have been several small cornice failures over the past w days associated with the warmest parts of the day.

Confidence

Régions couvertes