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Mesoscale Discussion 1077
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   Mesoscale Discussion 1077
   NWS Storm Prediction Center Norman OK
   0950 PM CDT Sat Jun 17 2017

   Areas affected...Central Missouri...central and southern
   Illinois...and western Indiana

   Concerning...Severe potential...Watch possible 

   Valid 180250Z - 180345Z

   Probability of Watch Issuance...40 percent

   SUMMARY...The discussion area is being monitored for a possible
   severe thunderstorm watch issuance over the next couple of hours.

   DISCUSSION...Scattered thunderstorms, including a couple of
   extensive linear segments from east-central Illinois
   west-southwestward to near Kansas City, are moving southeastward and
   approaching the discussion area at this time.  Moderate (2000-3000
   J/kg MUCAPE) instability and 40-50 knots of deep shear will support
   a continued threat of damaging winds and hail (especially along
   bowing linear structures), although some concern exists downstream
   about increasing convective inhibition, which lends uncertainty
   about the southeastward extent of the severe threat.  Local
   extensions of WW 345 may be needed to address the severe threat in
   the short term, and a new severe thunderstorm watch will possibly be
   needed in the discussion area.

   ..Cook/Guyer.. 06/18/2017

   ...Please see for graphic product...


   LAT...LON   38499247 39019239 39469202 39709113 39949002 40238889
               40478812 40718723 40818669 40558614 40108610 39588638
               39098693 38388872 37589034 37449078 37499127 37719187
               37999226 38499247 

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