Lawinenlagebericht

Jasper

Dec 22 – 23, 2018Parks Canada
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Lawinengefahr

Sun
Mon
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Over 100cm of snow has fallen in the Ice Fields region since Dec 11th. We continue to see wide spread avalanche activity throughout the backcountry. This is the time to be on high alert when traveling in any avalanche terrain.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2.5
    Moderate SW winds and new snow continues to build fresh wind, particularly near ridge-tops.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1.5–3.5
    This layer now sits under a meter of snow, any terrain that has not had previous activity on this layer should be given a wide berth.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1.5–3.5
    Several recent large avalanches have been the result of the entire snowpack failing on or near the ground due to the weak snowpack structure surrounding this interface.

Weather Forecast

A cooling trend has taken into affect as the recent storm moved out. Temperatures will gradually warm up through the weekend with alpine highs around -10°c. The sky will be generally a mix of sun and cloud with no precipitation in the near future. Moderate west winds forecasted A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Moderate to strong south west winds continue to load lee slopes at tree line and above creating firm windslabs. The Dec. 11th persistent weak layer (facets, crust and isolated surface hoar) has been buried by up to 100cm snow producing sudden results in test profiles. The deep persistent weakness lingers near the ground.

Avalanche Summary

Avalanche control in the Columbia Ice Fields region produced numerous results to size 2.5 triggering both windslabs and persistent slabs at alpine and treeline elevations. A natural avalanche cycle was noted with several large releases to size 3.5. The peak of this natural avalanche cycle seemed to occur during the storm Thursday night.

Confidence

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