Avalanche forecast

Banff Yoho Kootenay

Apr 7 – 8, 2013Parks Canada
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Avalanche danger

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

Expect poor isothermal conditions below tree line. Better overnight recovery is expected on Monday night.

Avalanche problems

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    Below treeline expect near isothermal conditions with little freeze. At treeline and above, natural loose wet avalanches will occur if the sun comes out and the day heats up.

  • Wet Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    The highest likelihood for deep wet slabs is from daytime warming on solar aspects, or from periods of rain, especially from thin areas where slabs overly facets or depth hoar.

Weather Forecast

On Monday, freezing levels should remain below surface, which will contribute to improving conditions and making triggering less likely. On Tuesday, a clearing pattern will provide opportunity for the sun to come out which will raise temperatures during the day and provide solar input to South and West aspects late in the day increasing the danger.

Snowpack Summary

Up to 20cm of moist snow sits over top of a crust that was formed last week. Many places below 2000m expect to find an isothermal snowpack.

Avalanche Summary

Today 3 size 2 avalanches were observed in the Vernillion Slide paths in Kootenay. The recent moist storm snow likely slid on a crust that was formed last week.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Wednesday

Regions covered