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Mesoscale Discussion 518
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   MESOSCALE DISCUSSION 0518
   NWS STORM PREDICTION CENTER NORMAN OK
   0736 PM CDT SAT APR 30 2016

   AREAS AFFECTED...W-CNTRL IL INTO E-CNTRL AND SERN MO AND N-CNTRL AR

   CONCERNING...SEVERE THUNDERSTORM WATCH 132...

   VALID 010036Z - 010130Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 132
   CONTINUES.

   SUMMARY...A THREAT FOR LARGE HAIL AND DAMAGING GUSTS WILL CONTINUE
   FOR THE NEXT 1-2 HOURS BEFORE DIMINISHING.  AN ADDITIONAL SEVERE
   THUNDERSTORM WATCH WILL NOT BE NEEDED BUT PERHAPS EXTENSIONS-IN-TIME
   MAY BE NEEDED IN LOCALIZED AREAS FOR AN ADDITIONAL HOUR.

   DISCUSSION...RADAR MOSAIC SHOWS SCTD STORMS NEAR A COLD FRONT FROM
   NERN MO/W-CNTRL IL SWWD INTO N-CNTRL AR.  STEEP H7-H5 LAPSE RATES
   LOCATED OVER THE AREA /8 DEG PER KM AT SGF/ PER 00Z RAOB DATA AND
   ADEQUATE DEEP-LAYER SHEAR SUPPORTIVE OF MULTICELLS AND SUPERCELLS
   WILL FAVOR A CONTINUED RISK FOR LARGE HAIL/LOCALLY DAMAGING GUSTS
   FOR THE NEXT 1-2 HOURS.  AFTER 02Z /SEVERE THUNDERSTORM WATCH 132
   EXPIRATION TIME/...DIURNAL COOLING EXPECTED TO OCCUR BETWEEN NOW AND
   02Z WILL ACT TO LESSEN BUOYANCY AND RESULT IN A GRADUAL DIMINISHING
   OF STORM INTENSITY THIS EVENING.  HOWEVER...A FEW STRONGER STORMS
   MAY CONTINUE TO POSE AN ISOLD SEVERE THREAT NEAR OR AFTER 02Z AND A
   LOCAL EXTENSION-IN-TIME AND/OR EXTENSION-IN-AREA WILL BEST HANDLE
   THIS SCENARIO.

   ..SMITH.. 05/01/2016


   ATTN...WFO...PAH...ILX...MEG...LSX...LZK...SGF...

   LAT...LON   35169271 35919297 38929060 39779146 40029081 39178976
               38658978 35129219 35169271 

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