Avalanche forecast

Banff Yoho Kootenay

Apr 1 – 2, 2013Parks Canada
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Avalanche danger

Wed
Thu
Alpine
1 · Low
Treeline
1 · Low
Below
1 · Low
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Highlights

The period of fine weather and good spring conditions is ending as the weather pattern is breaking down and will  allow for some frontal systems with cloud and possibly significant snow by the end of the week. JBW

Avalanche problems

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    2–3
    Cornice falls have been observed nearly every day. Some of these have been triggering slabs on the faces below. Many have run over usual travel routes.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2
    Both loose wet and wet slab avalanches have been observed on most solar aspects up to size three. Beware of sun exposed slopes after mid-day.

Weather Forecast

The blocking pattern i breaking down and we will see the first in a series of weak storms Tuesday night. By Friday the pattern will have changed and snowfall is likely.

Snowpack Summary

Another hard freeze overnight made for excellent travel. True corn is forming on low to mid elevation solar aspects with a thinner crust in the high alpine. Due north slopes have a mixture of wind effect and thin facetted snow with low penetration.

Avalanche Summary

A widespread spring cycle up to size three has been occurring on solar aspects starting mid afternoons. Deep wet slabs have been coming out in isolated locations on steep solar aspects late in the day., and some slabs have been observed failing at the bottom of the snowpack in shallow snowpack areas.. Cornices have been falling off also.

Confidence

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

Regions covered