Avalanche forecast

South Columbia

Jan 28 – 29, 2013Avalanche Canada
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Avalanche danger

Wed
Thu
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
2 · Moderate
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Highlights

Avalanche problems

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–4
    Watch for storm snow settling into a more cohesive slab on steep southerly slopes where it covers a crust or shady sheltered slopes in open glades where it rests on surface hoar. NW winds will develop fresh wind slab on S and E facing slopes.

Confidence

Fair - Intensity of incoming weather is uncertain

Weather Forecast

Synopsis: Northwesterly flow will bring a series of low-intensity pulses of precipitation interspersed with short-lived periods of clear weather to the region through the forecast period. Temperatures will start out fairly cool but rise Tuesday afternoon and into Wednesday to become mild.Tuesday: Mainly dry during the day. Temperatures rising from -8C in the morning to around -4C in the afternoon. Northwesterly winds, gusting to 30km/h at ridgetop.Wednesday: Light snowfall, up to 5cm. Treeline temperatures around 0C. Northwesterly winds gusting to 50km/h at ridgetop.Thursday: Dry and bright. Temperatures rising through the day with the possibility of above zero temperatures at treeline in the afternoon. Generally light northwesterly winds.

Avalanche Summary

On Monday, there were a few, mostly loose snow avalanches on north-facing slopes at higher elevations. There was one small (size 1) human-triggered avalanche reported from 1500 m at valley bottom near a creek. I suspect this is the kind of place surface hoar (most likely the Jan 24th layer, buried 40 cm) would be well preserved. Another small human-triggered avalanche was reported from a north-facing slope in the alpine.

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)

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