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Mesoscale Discussion 1744
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   MESOSCALE DISCUSSION 1744
   NWS STORM PREDICTION CENTER NORMAN OK
   0519 PM CDT SAT SEP 20 2014

   AREAS AFFECTED...PORTIONS OF SRN LOWER MI...NRN INDIANA...NERN IL

   CONCERNING...SEVERE THUNDERSTORM WATCH 504...

   VALID 202219Z - 202315Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 504
   CONTINUES.

   SUMMARY...THE RISK FOR SVR TSTMS CONTINUES ACROSS REMAINING VALID
   PORTIONS OF SEVERE THUNDERSTORM WATCH 504.

   DISCUSSION...MULTICELL CLUSTERS HAVE EVOLVED INTO A MORE ORGANIZED
   QUASI-LINEAR CONVECTIVE SYSTEM EXTENDING FROM S-CNTRL LOWER MI SWWD
   ACROSS NRN INDIANA INTO E-CNTRL IL. THIS ACTIVITY IS ADVANCING EWD
   AT AROUND 40-50 KT...WITH EMBEDDED BOWING SEGMENTS CAPABLE OF
   SUPPORTING DMGG WIND GUSTS. MODERATE WLY FLOW THROUGH THE CLOUD
   LAYER WILL CONTINUE TO ENHANCE THE RISK FOR DMGG WIND GUSTS VIA
   CONVECTIVE MOMENTUM TRANSPORT AMIDST 500-1000 J/KG OF MLCAPE. THIS
   ACTIVITY WILL CLEAR ERN PORTIONS OF REMAINING VALID PORTIONS OF WW
   504 DURING THE NEXT FEW HOURS...WITH LITTLE IN THE WAY OF A ROBUST
   SVR-TSTM RISK IN THE WAKE OF THIS ACTIVITY.

   ..COHEN.. 09/20/2014


   ATTN...WFO...IWX...GRR...IND...LOT...ILX...

   LAT...LON   40748594 40448824 40648872 41128757 41778553 42128484
               41088486 40748594 

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Page last modified: September 20, 2014
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