Avalanche forecast

Jasper

Feb 10 – 11, 2018Parks Canada
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Archived · expired 9 years ago

Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

http://www.pc.gc.ca/apps/scond/Cond_E.asp?oID=30731&oPark=100244Avalanche control today was effective and Highway 93 should reopen on schedule tomorrow.

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    2–3.5
    Persistent slabs remain a problem, areas that have already cleaned out in the last avalanche cycle pose the least risk.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2.5
    Up to 45cm of HST fell through the forecast area, over-loading the already weak persistent slab and running far and fast.

Weather Forecast

Cool arctic air and beautiful blue skies will dominate over the short term and likely into next week. The strength and location of the high pressure system will keep winds lighter, making for a longer period of good travel conditions and the midday sun will make you feel warm if you recreate in the sunny locations.

Snowpack Summary

Cool temps have started to reduce the touchiness of the storm slab throughout the forecast zone. Varied storm snow amts: 10-15cm in the Icefields, 40cm near Mt Wilson, and 30cm north of Beauty creek is sitting on the weak and facetted persistent slab at mid snowpack. Reverse loading from a northerly flow has cross-loaded Alpine features.

Avalanche Summary

Widespread avalanche cycle throughout the forecasted region with numerous to size 3.5 over the last 2 days from all aspects. All elevations saw significant propagation with debris often reaching valley bottom even from ALP start zones.

Confidence

Due to the number and quality of field observations

Regions covered