Lawinenlagebericht

Central Sierra Nevada

Sierra Avalanche Center
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Lawinengefahr

Hochgebirge
1 · Gering
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Veraltet — dieser Lagebericht ist 12 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Avalanche danger remains LOW for all elevations and aspects. Small isolated areas of shallow wet snow instability could occur today on slopes 37 degrees and steeper. Normal caution is advised.

Lawinenprobleme

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely
    Größe
    1

    After several warm days with minimal to no overnight refreeze, widespread areas of surface wet snow exist. Continued warming today will increase the depth of wet snow at the surface a bit further. Free water drainage from the snowpack is well established following a couple weeks of melt-freeze cycles. Due to the low January sun angle, cloud cover, and weak incoming long wave radiation this time of year, the rate of free water production at the snow surface will remain slow today. The slow rate of free water production and efficient drainage of the snowpack are expected to keep areas of wet snow instability small and isolated. Areas where rain falls on snow will have a greater chance for potential human triggered loose wet avalanche activity today. For the vast majority of areas, signs of wet snow instability are expected to remain limited to human triggered roller balls and pinwheels that could occur on any aspect.

Avalanche Discussion

Observations made yesterday on Red Vista (Carson Pass area) revealed wet surface snow 1 to 6 inches deep on all aspects at 10 am. Water droplets on conifer tree needles in very wind sheltered locations indicated that light rain had fallen in the area sometime Friday/Friday night. The overall snowpack in this area was warm, moist, and contained no evidence of faceting. All layers were very well bonded to one another. Signs of surface wet snow instability were very limited at noon, with one skier triggered pinwheel observed on a N aspect at 8,500'. Otherwise, ski cuts on convex terrain features did not produce signs of instability. Snow cover in the area differs dramatically by aspect with minimal snow cover remaining on S aspects and mostly continuous snow cover on N aspects.

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