Lawinenlagebericht

Northwest Inland

Dec 10 – 11, 2015Avalanche Canada
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Archiviert · abgelaufen 11 years ago

Lawinengefahr

Sat
Sun
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
1 · Gering
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Kernpunkte

The places you are going to find the best riding conditions in the wake of the storm are probably the same places where the danger from a layer of buried surface hoar is greatest.

Lawinenprobleme

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    2–5
    The new snow is sitting on a buried layer of surface hoar that may be at a critical depth for human triggered avalanches.

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    2–5
    Winds shifted from west to east and may have reverse loading mid slope features.

Confidence

Low - Due to the number and quality of field observations

Weather Forecast

The next few storms are tracking to the south and are going to largely miss the Northwest regions. FRIDAY: flurries, light southwest wind, freezing level valley floor SATURDAY: isolated flurries, light east winds, freezing level valley floor. SUNDAY: clear, moderate northwest winds.  Freezing level valley floor.

Avalanche Summary

The layer of buried surface hoar is my biggest concern.  It is probably widespread and is reaching a burial depth that was associated with a rash of skier and remotely triggered avalanches in the deeper snowpack around Terrace last weekend.

Snowpack Summary

Up to 60cms of settled snow now sits upon a layer of buried surface hoar.  This layer has the potential for remote triggering and wide propagations.  It is likely to be lurking in most sheltered areas at tree-line although I suspect it extends well into the alpine.  Variable winds are loading lee features. Below 1500m heavy rains have likely saturated the snow pack and may have formed a new rain crust.

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