Bulletin d’avalanche

Banff Yoho Kootenay

Jan 6 – 7, 2013Parks 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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Variable wind slabs have been mainly unreactive in the past few days, but are still areas to avoid in steep alpine features. 

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Watch for sloughing in very steep, shallow terrain where the snow has lost all cohesion due to facetting.

Weather Forecast

Mod NW alpine winds Sunday with a few cm possible West of the divide, but dry in the Eastern regions. Forecasts are currently calling for increasing winds Monday night/Tuesday into the strong - extreme range and light amounts of snow.  This may increase the overall hazard.

Snowpack Summary

Field trips in Kootenay and Hwy93 N. found surface hoar to 1cm up to treeline as well as surface facetting.  Some hard wind slabs in alpine areas are mainly unreactive.  Mid pack maintaining strength in deeper snow pack areas, but thin areas are mainly faceted, including the basal Nov 6 crust.

Avalanche Summary

A few small loose snow avalanches triggered by skiers in very steep terrain at treeline in the Kootenay region.  Some small loose snow avalanches also noted from steep features in the alpine on solar aspects from the last 24 hrs. All were maximum sz. 1

Confidence

on Sunday

Régions couvertes