Lawinenlagebericht

Jasper

Dec 21 – 22, 2019Parks Canada
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Archiviert · abgelaufen 7 years ago

Lawinengefahr

Sun
Mon
Hochgebirge
4 · Gross
Waldgrenze
4 · Gross
Unterhalb
3 · Erheblich

Kernpunkte

Stay out of avalanche terrain as this storm tests our weak snowpack. Weeping wall & polar circus will be closed Saturday and Sunday due to avalanche control on the Icefields Parkway. Emergency road closures are possible depending on storm intensity.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2.5

    Continued S-SW winds are creating wind slabs in NW to SE lee aspects. Sensitivity expected to be reactive in the immediate future and may wake deeper, weaker interfaces.

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely - Certain
    Größe
    1–2.5

    As new snow accumulates, Expect the hazard to increase.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3

    Triggering the windslab problem has potential to step down to this layer.

Weather Forecast

Continued precipitation tonight and into tomorrow could see up to 30cm

Saturday: Periods of snow. Accumulation: 16 cm. Alpine temperature: High -3 C. Mostly light ridge wind occasionally gusting to 40 km/h. FL: 1700M

Sunday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: Low -13 C, High -9 C. Ridge wind light to 15 km/h. FL at VB

Snowpack Summary

10cm new over the last 6 hours, Light winds continue building variable strength wind slabs on lee and crossloaded features at or above treeline. Persistent interfaces layered through the snowpack that might wake as the up to as the 35cm's of new snow forecasted in the next 36 hours accumulates.

Avalanche Summary

No new avalanches observed today with poor visibility and a field trip to Parkers ridge area.

Confidence

Forecast snowfall amounts are uncertain

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