Bulletin d’avalanche

Banff Yoho Kootenay

Feb 22 – 23, 2015Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

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

The weaker basal depth hoar/facets aren't going anywhere in a hurry. We still have low confidence in shallow or variable snowpack areas. Travel conditions are excellent. SH

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Be cautious near ridge-crests and in lee areas. These seem to be isolated to the Icefields Parkway region (found on Observation sub-peak Saturday). These will be a short term problem.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The lower half of the snowpack is weak due to the presence of basal depth hoar and facet layers. Natural activity has ceased but skier triggering is still possible, especially in shallow areas and places where the snowpack is unevenly distributed.

Weather Forecast

Temperatures will start to creep up Sunday but we will stay in a light Northerly flow. A mild inversion (alpine temps still below freezing) will enter the region Sunday night into Monday with mainly sunny skies.

Snowpack Summary

A well settled upper snowpack with highly variable depths sits over the ever present weak facets and depth hoar in the bottom half of the snowpack. Colder temperatures have helped the slab bridge over the weaker base. On Saturday, strong to extreme North winds up Hwy 93N formed thin wind slabs in the lees of ridge crests and gully features.

Avalanche Summary

No new avalanches were observed or reported today.

Confidence

Régions couvertes