MESOSCALE DISCUSSION 0594
   NWS STORM PREDICTION CENTER NORMAN OK
   1251 PM CDT THU APR 26 2007
   
   AREAS AFFECTED...NERN IND...WRN OH
   
   CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY 
   
   VALID 261751Z - 261845Z
   
   SUSTAINED CLUSTER OF THUNDERSTORMS IS GRADUALLY INTENSIFYING OVER
   ECNTRL IND...CLEARLY WITHIN THE WARM SECTOR AHEAD OF MAIN UPPER LOW.
    THIS ACTIVITY IS LIFTING NEWD INTO A REGION OF MORE FOCUSED
   CONFLUENCE NEAR THE SLOWLY RETREATING WARM FRONT.  SHEAR PROFILES
   APPEAR SUPPORTIVE OF SUPERCELLS DESPITE THE ONGOING ORGANIZED
   MCS-TYPE STRUCTURE.  THERE APPEARS TO BE SUFFICIENT LOW LEVEL
   SHEAR/HELICITY FOR ISOLATED TORNADOES WHEN THESE STRONGER UPDRAFTS
   INTERACT WITH AFOREMENTIONED WARM FRONTAL ZONE.
   
   ..DARROW.. 04/26/2007
   
   
   ATTN...WFO...RLX...CLE...ILN...IWX...IND...
   
   41848628 41418347 39888242 38748339 38998478 40368575
   41198691