Avalanche forecast

Jasper

Nov 28 – 29, 2020
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Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
1 · Low
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Highlights

Avalanche control planned for Saturday with intermittent closures of up to 1.5 hr to be expected between Parkers Summer and Big Bend. Saturday will be a great time to look for sheltered areas and enjoy the new snow. Beware of wind slabs. "JSS"

Avalanche problems

  • Wind Slabs

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

    New snow and strong winds are building up wind slabs and possibly overloading the weaker layers below.

  • Persistent Slabs

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

    Pockets of previous wind deposited snow overlies the Nov 4 rain crust. Test results are mixed on this layer. Small incremental loads will continue to test this layer

  • Loose Dry

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

    More snow in the forecast means more snow on canyon walls and above ice climbs, Be aware of overhead and changing condition.

Weather Forecast

Expecting 20 cm of fresh snow with strong southwest winds and mild temperatures throughout the night. On Saturday the skies are expected to clear with alpine high of -9 and strong northwest winds.

Snowpack Summary

The snowpack is highly variable depending on location. Height of snow at Parkers is ~100cm at treeline. The Nov.4 crust found up to 2600m, and is ~70cm deep. Test results yesterday showed hard results CTH23 failing on the basal weakness. Continued wind slab developing on N and E aspects ridge top down into treeline.

Avalanche Summary

No patrol today, no avalanches reported.

Confidence

Forecast snowfall amounts are uncertain on Saturday

Regions covered