Lawinenlagebericht

South Coast Inland

Dec 22, 2016Avalanche Canada
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Archiviert · abgelaufen 10 years ago

Lawinengefahr

Thu
Fri
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig

Kernpunkte

As this past week's storm snow continues to settle it will still be important to evaluate the bond between the old snow surface and the new snow. There is still potential for a week sliding layer in isolated sheltered areas.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–3
    Moderate to strong southwest winds have created wind slabs in the lee of terrain features
  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    30-50cm of new snow sits on a variety of potential weak sliding layers.

Confidence

Moderate - Forecast snowfall amounts are uncertain on Thursday

Weather Forecast

Thursday: Flurries, accumulation 5-10cm / Moderate southwest wind / Alpine temperature -2Friday: Mainly cloudy with isolated flurries / Light northeast wind / Alpine temperature -5Saturday: Mix of sun and cloud/ Light north wind / Alpine temperature -8

Avalanche Summary

Recent reports in the Duffy Lake area indicate a few natural avalanches running to size 2 in the alpine. I would suspect there to be continued potential for skier and rider triggering with the recent new snow, strong winds at upper elevations and a possible weak bond at the storm/old snow interface the possibility of buried facets or surface hoar in isolated sheltered areas.

Snowpack Summary

30-60cm new snow overlies the previous variable snow surface from last week, which includes hard wind pressed or scoured areas, old wind slabs, weak faceted snow, or surface hoar. New wind slabs that have formed in response to southwest winds. In the Duffey Lake area, recent snowpack tests gave hard sudden results down 60 cm at the interface between the recent storm snow and old snow on rounding faceted crystals. The widespread mid-November crust is typically down approximately 1-1.5m. Recent snowpack tests have shown the crust to be unreactive, but it could become a problem in shallow alpine start zones.

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