Lawinenlagebericht

South Rockies

Feb 20, 2017Avalanche Canada
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Archiviert · abgelaufen 10 years ago

Lawinengefahr

Mon
Tue
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Watch for isolated wind slabs and shallow snowpack areas where triggering a deep persistent slab avalanche remains possible.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    Watch for fresh wind slabs in exposed high elevation terrain.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–3
    A weak layer near the base of the snowpack has the potential for large avalanches, especially in areas with minimal rider compaction or thin variable snow cover.

Weather Forecast

MONDAY: Cloudy with isolated flurries, moderate southwest winds, freezing level around 1500 m.TUESDAY: Flurries with 5-10 cm of new snow, strong southwest winds, freezing level around 1500 m.WEDNESDAY: Cloudy, light southwest winds, cooling trend with alpine temperatures around -10 C.

Avalanche Summary

On Sunday, a few size 1-1.5 naturally triggered storm slabs and loose dry avalanches were reported on north and east treeline aspects.On Monday, watch for fresh wind slabs at higher elevations. Also keep in mind that the deep persistent slab problem is a low probability/high consequence scenario that warrants extra caution around large open slopes, especially in shallow snowpack areas.

Snowpack Summary

Light flurries will add to 5-10 cm of recent snow with moderate to strong southwest winds forming deeper deposits and wind slabs. The new snow sits above a thick rain crust below 1900 m. A stiff midpack sits above weak sugary snow near the ground. This deep persistent weakness is primarily a concern in shallow snowpack areas. Watch this video from the South Rockies field team for some recent test results on this layer.

Confidence

Moderate - Due to the number of field observations

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