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Mesoscale Discussion 60
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   Mesoscale Discussion 0060
   NWS Storm Prediction Center Norman OK
   1021 AM CST Mon Jan 16 2017

   Areas affected...East-central into northeastern Nebraska

   Concerning...Freezing rain 

   Valid 161621Z - 162215Z

   SUMMARY...Freezing rain is expected to continue over parts of
   east-central into northeast Nebraska today, with localized rates in
   excess of 0.05"/hr.

   DISCUSSION...Surface analysis shows the wet-bulb zero line near or
   just northwest of Omaha, and extending southwestward into north
   central KS as of 16Z. Meanwhile, a broad band of precipitation
   currently persists across the entire area, extending eastward across
   IA in a broad zone of warm advection just above the surface.

   As the upper trough and surface low continue northeastward across
   KS, surface winds across eastern NE should back a bit, helping
   temperatures to remain near or just below freezing via cold
   advection. This may help to counteract any warming from rain aloft
   and rising/saturating surface dewpoints. Radar trends and model
   output are in good agreement depicting an area of relatively longer
   precipitation duration northwest of the low track, and west of the
   dry slot, centered over northeastern NE. Precipitation may
   changeover to snow toward the end of the event, especially over
   western parts of the MCD area.

   ..Jewell.. 01/16/2017


   LAT...LON   42499779 42689695 42709647 42609627 42289608 41899603
               41789608 41509655 41199705 40859766 40599806 40569853
               40959870 41449861 42019849 42499779 

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