Bulletin d’avalanche

Banff Yoho Kootenay

Dec 25 – 26, 2015Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Fri
Sat
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Low, Low, Low, Merry Christmas!Continue to evaluate steep alpine terrain for small wind slabs and enjoy the great start to the season!

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–2
    The slab above the Dec 3 surface hoar layer has not been very reactive recently. Snow pack tests produce shears in the moderate to hard range. This is mostly a concern in areas near the divide with a deeper snowpack and more snow over the weakness.

Weather Forecast

The NW flow continues through Christmas bringing cold and stable weather with no new snow in the forecast until at least the 26th. Upper elevation winds will begin to increase late in the day on Christmas and continue through the 26th. Treeline temperatures should stay between -10 and -16'C

Snowpack Summary

A well settled snowpack with few weaknesses exists throughout the region. Some small isolated wind slabs may exist on leeward slopes in the high alpine. Below 2000m the Dec 3 layer of surface hoar remains visible and produces hard, planar test results in some areas. This weakness is strengthening. Thin snow pack areas are beginning to facet out.

Avalanche Summary

No new natural slab avalanches have been observed recently. Some sluffing has been observed in really steep terrain due to the low density surface snow.

Confidence

Due to the number and quality of field observations

Régions couvertes