Bulletin d’avalanche

Northwest Inland

Dec 4 – 5, 2013Avalanche Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

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

This forecast is based on limited field observations. If you head into the mountains, please send a note to [email protected] and let us know what you saw.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Outflow winds are reverse-loading and cross-loading exposed slopes. Fresh and touchy wind slabs are likely lurking below ridge crests and behind terrain features.

Confidence

Poor - Due to the number of field observations

Weather Forecast

Thursday: A mix of sun and cloud. Treeline temperatures are around -10 to -15 with moderate northeasterly alpine winds. Friday and Saturday: Sunny and cold. Treeline temperatures are around -15 to -20. Alpine winds are likely to be strong from the North-Northeast.

Avalanche Summary

Several wind slab avalanches up to Size 2 were observed just below ridge crests between 1500m and 1800m in the Ashman Ridge area last Sunday.

Snowpack Summary

Around 40 cm of recent storm snow may still need some time to bond to the previous snow surface. Northerly outflow winds are likely forming fresh wind slabs in exposed lee terrain and scouring windward terrain. Below approximately 1000m surface hoar is growing on sheltered slopes, while surface snow on steep sun-exposed slopes is becoming moist with daytime warming. Average snowpack depths near treeline are variable but around a metre with the bottom half being a crust below 1200m elevation.

Régions couvertes