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Mesoscale Discussion 125
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   Mesoscale Discussion 0125
   NWS Storm Prediction Center Norman OK
   0359 AM CDT Sat Mar 17 2018

   Areas affected...Chicagoland...Northern/East-Central
   IN...West-Central/South-Central OH

   Concerning...Winter mixed precipitation 

   Valid 170859Z - 171300Z

   SUMMARY...Mixed winter precipitation is possible over portions of
   the OH Valley this morning.

   DISCUSSION...Regional radar imagery shows a band of precipitation
   arcing from northern IL into southwest/south-central OH. This area
   of precipitation is expected to gradually shift eastward over the
   next several hours as the shortwave trough responsible for the
   ongoing warm-air advection progresses through the OH Valley. Surface
   observations show that mixed winter precipitation exists from
   Chicagoland region into adjacent northwest IN. A transition to
   freezing rain is also anticipated across central IN soon. However,
   in these areas, precipitation will likely erode from southwest to
   northeast over the next hour or two as the dry slot associated with
   the shortwave trough continues to push into the region. 

   Farther southwest (across east-central IN and west-central/
   south-central OH), precipitation rates are expected to increase over
   the next hour or so with a predominant precipitation type of
   freezing rain. This precipitation is generally expected to be light
   but freezing rain rates may briefly exceeded 0.05"/hr within the
   heavier cores.

   ..Mosier.. 03/17/2018

   ...Please see for graphic product...


   LAT...LON   40598689 41608896 42138920 42168811 41378597 40188291
               39868217 39228182 38948305 40598689 

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