Avalanche forecast

Jasper

Apr 29 – 30, 2015Parks Canada
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Archived · expired 11 years ago

Avalanche danger

Fri
Sat
Alpine
No rating
Treeline
No rating
Below
No rating
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Highlights

Up to 30cm of new snow up high (above 2100m) around the forecast region, forming a touchy storm slab on lee aspects. Winter is temporarily back in the mountains.

Avalanche problems

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–3

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–3
    Storm slabs on lee aspects in the alpine will be touchy as they are sitting on harder surfaces.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2
    Natural loose wet activity expected during the heat of the day, particularly on steep solar aspects.

Weather Forecast

Weather models tend to agree that we are in for more of the same wet and cool weather for the next several days. Snow will continue to fall in the alpine and whipped around by moderate winds from the west.

Snowpack Summary

Up to 30 cm of new snow in the alpine today is sitting on a supportive melt-freeze crust/mid-pack. Uncertain how well it is bonding to crusts. Deep weak layers dormant when temperatures are below freezing but may be triggered as temperatures rise and increased load.  Snowpack is weak below tree line and isothermal in many locations.

Avalanche Summary

Widespread storm slabs forming in the alpine with this new dump of snow. Numerous loose wet avalanches expected with rain at tree line and below,

Confidence

Regions covered