Bulletin d’avalanche

Banff Yoho Kootenay

Mar 7 – 8, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

The storm snow continues to settle and bond to the underlying surfaces, but it remains touchy in steep convexities and in thin, alpine features.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3
    The natural cycle is over and cooler temperatures have tightened up the upper pack, however we still expect to see touchy storm slab conditions over the next few days, especially in thin, faceted areas in the alpine.

Weather Forecast

Bit of a split in weather within the region, with the northern portions having clear to scattered clouds and cool morning temp's. The southern portions may see scattered flurries with up to 5cm. No significant winds for the next couple of days.

Snowpack Summary

Up to 60 cm of storm snow since Friday has settled to 30-40 cm. Cool temp's have solidified the upper snowpack and the bond to the storm snow interface. The storm slabs remain touchy to trigger in the alpine, especially in thin, faceted areas. A team in Yoho observed a 50cm slab on facets that failed very easily in tests in the moraines.

Avalanche Summary

A field team up the Yoho Valley towards Takakkaw Falls observed several sz 3-3.5 avalanches that had run near the end of the last storm (72+hrs). No new avalanches observed in the last 24 hours, but whumphing/settling observed in wind-affected alpine features.

Confidence

Régions couvertes