Avalanche forecast

Jasper

Dec 16 – 17, 2013Parks Canada
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Archived · expired 13 years ago

Avalanche danger

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

Early season hazards exist just under the surface. Winds have gusted into 90km/hr range.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2
    Winds have been strong adding to this condition. Expect unusual locations for wind-slab development.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3
    Initiating upper wind-slab layer has potential to step down deeper to this basal layer.

Weather Forecast

Winds will continue to gust strong until Tuesday evening. Snowfall will range from 5-15cm in next few days and temperatures will cool later in week.

Snowpack Summary

Variable wind slab on lee features at treeline and alpine. Alpine is a mosaic of scoured ground and wind-loaded gully features on lee aspects. Strong gusting winds are constantly changing directions. Expect windslab development in unusual locations. Oct 27 Raincrust exists near bottom of snowpack with Facets above and below.

Avalanche Summary

Size 2.5 off Mt. Tangle observed Sunday afternoon on NE aspect in a steep alpine gully at ridgetop.

Confidence

Wind effect is extremely variable

Regions covered