Bulletin d’avalanche

Kootenay Boundary

Feb 5 – 6, 2013Avalanche Canada
Voir sur la carte
Archivé · expiré 14 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Forecast southwest winds and light snowfall will create fresh and reactive windslabs in lee terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    A mixed bag of weak interfaces is buried between 35 and 50cm below the surface. Triggering may be more likely in unsupported terrain where the overlying slab has been wind-affected.

Confidence

Fair - Due to variable snowpack conditions

Weather Forecast

Wednesday: Light snowfall/ Moderate southwest winds / Alpine temperature of about -8.0Thursday: Light snowfall / Light south winds / Alpine temperature of about -7.0Friday: Clearing / Light northwest winds / Alpine temperature of about -9.0

Avalanche Summary

No new avalanches have been reported from the region.

Snowpack Summary

Light amounts of new snow are being redistributed into thin wind slabs by moderate southwest winds, and overlie a gamut of old surfaces which include: old wind slabs in exposed terrain, surface hoar on a variety of aspects and elevations, and a melt-freeze crust on previously sun-exposed slopes.  These surfaces will be something to watch as the overlying slab develops.About 35-50cm below the surface is an interface of surface hoar, facets or sun crust that was buried on Jan 23. Although it seems to be gaining strength in some areas, this weakness is still reactive to skier traffic in unsupported terrain and remains a concern of professionals in the region.The snowpack below this is generally well bonded.

Régions couvertes