MESOSCALE DISCUSSION 0528
   NWS STORM PREDICTION CENTER NORMAN OK
   1110 PM CDT FRI APR 22 2011
   
   AREAS AFFECTED...MUCH OF OK ...SERN KS...SWRN MO...NWRN AR
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 230410Z - 230615Z
   
   WE ARE MONITORING FOR FURTHER DEVELOPMENT BEHIND EARLIER
   CONVECTION...AND AN ADDITIONAL WW COULD BE REQUIRED AT SOME POINT
   FOR MUCH OF CNTRL/NRN OK. A NEW SEVERE THUNDERSTORM WATCH HAS
   ALREADY BEEN ISSUED FOR NERN OK INTO SWRN MO/NWRN AR.
   
   SEVERE STORMS PERSIST ACROSS MUCH OF SRN OK INTO SRN MO DUE TO A
   PERSISTENT SWLY LOW LEVEL JET AND PRESENCE OF MODERATE INSTABILITY.
   SOME CELLS ARE LEFT SPLITS...AND MAY EFFECT ADJACENT NRN COUNTIES TO
   THE ONGOING BAND OF STORMS OVER SRN OK. IT IS UNCLEAR HOW FAR N ANY
   SPLITS WILL GO. HOWEVER...FARTHER N INTO THE COOLER AIR...MODELS
   DEVELOP CONVECTION LATER TONIGHT AS A DEFORMATION ZONE SETS UP FROM
   NRN OK INTO SRN MO. WITH AMPLE SHEAR AND INSTABILITY
   AVAILABLE...STORMS WILL HAVE THE POTENTIAL TO PRODUCE HAIL.
   ADDITIONAL SEVERE THUNDERSTORMS WATCHES COULD BE NEEDED IF THE
   THREAT BECOMES WIDESPREAD ENOUGH.
   
   ..JEWELL.. 04/23/2011
   
   
   ATTN...WFO...PAH...LSX...LZK...SGF...TSA...ICT...OUN...
   
   LAT...LON   36569125 36139268 34979491 34269728 34349882 35029931
               35739928 36359901 36739835 37499405 37689175 37669118
               36569125