Bulletin d’avalanche

Banff Yoho Kootenay

Dec 27 – 28, 2015Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

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

A bit of wind in the last 24 hours has been responsible for some wind effect and slab formation in the alpine.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Isolated windslabs can be found in alpine terrain as a result of recent West and Southwest winds.

Weather Forecast

A bit of moisture will trickle over the divide Sunday and Monday as pacific air fights against polar air over the prairies expect cloud and trace amounts with treeline temperatures between -10 and -15. A mild temperature inversion has formed. A high pressure system will take hold Tuesday bringing a return to clear skies and northerly winds

Snowpack Summary

A well settled snowpack with few weaknesses exists throughout the region. Some small isolated wind slabs 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

One new natural slab avalanche was observed Friday on a steep N facing hanging snowfield on White Pyramid, 15-20m wide and about 1m deep, possibly cornice triggered. Some sluffing has been observed in really steep terrain due to the increasing winds moving the low density surface snow .

Confidence

Due to the number of field observations

Régions couvertes