Avalanche forecast

Jasper

Nov 30 – Dec 1, 2015Parks Canada
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Archived · expired 11 years ago

Avalanche danger

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

Un-seasonally warm temperatures make for bikinis and board-shorts in the Alpine! Enjoy it for another day before we return to winter. Limit your exposure to large overhead features, especially on ice.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    North winds have formed wind slabs on isolated terrain features at upper elevations.

  • Loose Dry

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–3
    Temperature inversion continues. Higher elevations have remained above 0 overnight, these temps combined with daytime solar effect on steep gulley features will continue producing loose snow releases. Thin solar ice features have been collapsing.

Weather Forecast

Inversion conditions pushing out of the area late in the day Monday with freezing levels jumping to between 2100 and 3000m during the day and nose-diving at night. As the high weakens the winds will pick up considerably and more seasonable temperatures will push into the Alpine. Only light precipitation expected through the week.

Snowpack Summary

Frigid overnight temperatures and day-time warming continue to settle the snowpack. Whumphing noted on pockets of windslab in exposed areas around treeline. Surface hoar formation continuing below treeline and a thin sun crust on solar aspects at treeline and above.

Avalanche Summary

Yesterday numerous loose dry avalanches up to size 2.5 in steep solar facing gulleys between 2100 and 2700 m. Whumphing observed in open areas at treeline on windslab. No avalanche propagation observed.

Confidence

Regions covered