Avalanche forecast

Jasper

Apr 24 – 25, 2019Parks Canada
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Archived · expired 7 years ago

Avalanche danger

Fri
Sat
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Watch for building wind slabs in the alpine.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Continued winds Tuesday redistributed recent storm snow to lee features combined with new snow, and warm temperatures.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1.5–3

    New load with warm temps could increase the likelihood of triggering.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5

    Cooling weather on Wednesday should keep the snow cold. Watch out for sunny periods and slopes catching the sun.

Confidence

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

Weather Forecast

Parker Ridge:

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -2 C.

Ridge wind west: 10-20 km/h.

Freezing level: 2100 metres.

Snowpack Summary

Ongoing moderate to strong westerly winds have created fresh wind slabs in immediate lee features. This snow now overlies several crusts / facet layers in the upper 40cm, and a faceted layer down 70cm on shady aspects. Expect unsupportive slush at lower elevations (below treeline).

Avalanche Summary

Recent whumfing in low angle alpine terrain.

1 size 1.5 Steep N aspect alpine, cornice triggered windslab that appears to have stepped down to a persistent layer.

Regions covered