Bulletin d’avalanche

Banff Yoho Kootenay

Dec 1 – 2, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Decent ski quality reported in sheltered locations at treeline.  SH

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Watch locally for thin wind slabs developing in the lees of ridges if we receive increased winds Sat as there is a lot of snow available for transport.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    The Nov 6 raincrust is down 50-90 cm. Although we have not seen any recent activity on this crust, this is still a significant layer in the snowpack. Evaluate this layer carefully prior to entering steeper/bigger terrain.

Confidence

Intensity of incoming weather systems is uncertain on Saturday

Weather Forecast

5-10cm at TL by Sat. night and light amounts through to Monday.  We may see increased alpine SW flow Sat. with freezing levels up to 1600-1700 during the day.  Possibly rain in lower elevation areas W of divide such as Field.

Snowpack Summary

Sunshine study plot CTH24RP on Nov. 6 CR approx. 20 cm above ground.  Crust is breaking down.  Small SH noted (3mm) 10cm below surface.  90-100cm at TL in most areas, and average 5cm HN24 with little wind effect

Avalanche Summary

Lake Louise ski hill had no results from explosives control in alpine terrain.  No other avalanches observed.

Régions couvertes