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Mesoscale Discussion 76
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   Mesoscale Discussion 0076
   NWS Storm Prediction Center Norman OK
   0940 AM CST Tue Feb 20 2018

   Areas affected...central into northeast OK...southeast KS

   Concerning...Freezing rain 

   Valid 201540Z - 201915Z

   SUMMARY...Freezing rain rates ranging from 0.02-0.20 inch per hour
   expected over the next several hours.  Areas in northeast OK and
   southeast KS currently above freezing and reporting rain as of
   930am, will likely transition to freezing rain later this morning.

   DISCUSSION...Radar mosaic and NLDN lightning data indicate a shield
   of convective precipitation from southwest OK northeast through
   southeast KS as of mid morning.  A surface front is accelerating
   southeast across the I-44 corridor in OK and southwest MO.  The 32
   degree F demarcation is located in a wavy fashion from roughly
   Chickasha, OK north-northeast to near Bartlesville, OK and northeast
   to Bourbon County, KS.  The quickest translation of the front will
   occur over central OK during the next few hours where northerly
   surface winds behind the front are gusting to around 30 mph.

   Rainfall observations from the OK Mesonet have indicated rainfall
   amounts in areas below 32 deg F have ranged from a few hundredths to
   around 0.40 inch during the 830-930am period.  Expecting convective
   enhancement to the rainfall rates to continue during the morning
   from central OK northeast into southeast KS.  As a result, freezing
   rain rates will range from 0.02 inch-0.05 inch/hour but locally in
   the 0.10-0.20 inch range in the heavier bursts.

   ..Smith.. 02/20/2018

   ...Please see for graphic product...


   LAT...LON   34979842 37829563 37749501 37219488 35389677 34849761
               34779810 34979842 

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