Avalanche forecast

Kootenay Boundary

Apr 14 – 15, 2019Avalanche Canada
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Archived · expired 7 years ago

Avalanche danger

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

New snow has accumulated at upper elevations along with westerly winds. Use caution around ridge crests and lee terrain features, where deposits will be most reactive.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–1.5
    Around 15 cm fresh snow has accumulated at upper elevations. Older wind slabs may be hidden under the fresh snow. Be cautious around ridge crests and in wind loaded terrain where deposits will be deepest.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5
    Warm temperatures and sun exposure will increase the likelihood of loose wet avalanches.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

SUNDAY NIGHT: Cloudy with isolated flurries, trace accumulation / west wind, 15-30 km/h / alpine low -7 C / freezing level 1000 mMONDAY: Mix of sun and cloud and isolated flurries / west wind, 10-15 km/h / alpine high -1 C / freezing level 1700 mTUESDAY: Cloudy with clear periods and isolated flurries / west wind, 15-35 km/h / alpine high 0 C / freezing level 2000 mWEDNESDAY: Mix of sun and cloud / west wind, 15 gusting to 50 km/h / alpine high +3 C / freezing level 2300 m

Avalanche Summary

Late in the day Sunday, small wind slab pockets were reactive to skier traffic.On Wednesday, wind slabs in lee features were reactive to explosives.On Tuesday, wind and storm slabs up to size 1 were reactive to skier traffic on sun affected slopes in the alpine.

Snowpack Summary

Around 15 cm new snow accumulated into Sunday, westerly wind are redistributing snow at upper treeline and higher. The new snow adds to last weeks snowfall totalling 15-30 cm over a crust on most aspects. On high alpine polar aspects, the underlying snowpack is settled and dry.Below treeline snow is disappearing rapidly.

Regions covered