Bulletin d’avalanche

South Columbia

Jan 26 – 27, 2013Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Watch for storm snow gaining cohesion on steep southerly slopes where it covers a crust or shady sheltered slopes in open glades where it rests on surface hoar. Pockets with pillows of windslab are likely on north or east facing slopes behind ridges.

Confidence

Good

Weather Forecast

Next active system (aka fresh snow?) not expected until Monday; likely to arrive with lots of wind. Tuesday may be cold and dry (if you're under the arctic air) or warmer with more snow (if you're south of the arctic front).Overnight & Sunday: WIND becoming west light to moderate, TEMPERATURE -5 to -10 C near treeline with freezing level to 900m possible, PRECIPITATION traces of new snow possible.Monday: WIND NW moderate to strong, PRECIP 15 to 20 cm late in the day, TEMP -5  near treeline but freezing level could climb again to 800m ahead of the cold frontTuesday: Another 15 to 20 cm of snow, light to moderate NW wind, slightly cooler  with -10 C near treeline.

Avalanche Summary

On Thursday small natural avalanche cycle took place in the storm snow up to size 2 which ran on the January 23rd interface mostly on N and E face. Friday either no new activity or small loose were common; a few small slabs. GNP was the expception with moderate Na cycle to size 3 Fri AM in low density HST.

Snowpack Summary

HST 40 to 50 cm over Jan 24 SH/sc. HST settling into soft slab - watch on solar and SH (esp BTL). Pockety WSL N & E aspects. Jan 4 SH down 90 TL & BTL. Rime or Zr CR reported in Monashees.(Eagle Pass, MPS)

Régions couvertes