Avalanche forecast

Northwest Inland

Mar 6 – 7, 2015Avalanche Canada
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Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
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Highlights

New wind slabs have formed over a variety of weak surfaces, and will likely remain sensitive to human triggering.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–3
    Light to moderate snow accumulations and strong southwest winds have built reactive new wind slabs in lee terrain. Watch for triggering in the lee of ridges and terrain breaks.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Mainly overcast skies, strong southwest winds and very light snowfall are expected on Saturday. On Sunday and Monday a Pacific low will make landfall bringing light to moderate snowfall (up to 15cm) with the highest accumulations forecast for the south of the region. Winds with the snowfall should be strong to extreme from the southwest. Freezing levels should hover around 1000m on Saturday, spiking briefly at 1500m on Sunday, and then falling back to about 1000m on Monday

Avalanche Summary

At the time of writing, no avalanches have been reported from Thursday, but there may have been some avalanche activity in response to recent snow and wind-loading.

Snowpack Summary

New snow and strong SW winds have likely built reactive wind slabs in exposed lee terrain. These overlie a variety of interfaces including older wind slabs, a sun crust, an old rain crust, surface hoar, and/or surface facets. At the base of the snowpack, weak facets may be found. Keep an eye out for cornices that could fail.

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