Avalanche forecast

Kootenay Boundary

Apr 16 – 17, 2017Avalanche Canada
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Avalanche danger

Tue
Wed
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Wind slabs are the main concern right now. Carefully assess terrain before committing to bigger lines.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2
    Shifting wind directions have created fresh wind slabs on a variety of aspects.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    If the snow does not experience an overnight re-freeze, there is an increased risk of loose wet avalanches. Even small slides can have serious consequences.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

We're back to wet spring weather late on Monday through Tuesday. Brief clearing for Wednesday.  MONDAY: Rain (5-10mm) falling mostly after noon, with wet snow (5-10cm) above 1700m. Winds 20-30 km/h from the south.TUESDAY: Wet snow or rain (10-15mm / cm). Freezing level around 1700 m. Winds moderate southwesterly.WEDNESDAY: A mix of sun and cloud. Freezing level rising to 2100m. Winds moderate southerly.

Avalanche Summary

No new reported.

Snowpack Summary

Sustained warm temperatures (+6 at treeline) likely resulted in moist snow on all elevations and aspects during the day on Sunday. An overnight re-freeze may give a widespread (breakable) crust on a wide range of elevations and aspects. The snow and shifting wind directions during the last snowfall on Thursday-Friday created fresh slabs on a variety of aspects at Treeline and above. We've had limited observations to help us determine how it is bonding to the underlying crust.Cornices are large in some areas and could trigger large avalanches when they fail.

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