Bulletin d’avalanche

Jasper

Nov 18 – 19, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Be aware that early season hazards lurk beneath the snow surface.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    This layer was easy to identify 10cm down from the surface. On lee aspects this may sweep a person off their feet.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    This layer showed in tests around the Columbia Icefields area from 2200m to 2400m. It released with a sudden planar character between two dense layers which indicates that it could be a buried surface hoar layer.

Weather Forecast

Light snowfalls are expected overnight, with slightly more snow in the Icefields. A second front will follow with increasing amounts of snow expected to arrive on Monday and Tuesday.

Snowpack Summary

Variable snow distribution in the alpine ranging from 0 - 220cm. There is consistent coverage around 60cm at treeline.? Two midpack crusts are providing good support. Below treeline, snow depths are? below critical levels to cause an avalanche.

Avalanche Summary

No new avalanches have been observed in the last week. Several slab avalanches to size 2.5 occurred approximately 10 days ago, on a glaciated NE lee aspect in the high alpine.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

Régions couvertes