MESOSCALE DISCUSSION 1224
   NWS STORM PREDICTION CENTER NORMAN OK
   0351 PM CDT SAT JUN 12 2004
   
   AREAS AFFECTED...SRN IL AND SERN MO
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 122051Z - 122215Z
   
   INCREASING THREAT FOR DAMAGING WINDS ACROSS FAR SERN MO AND SRN IL
   WITH MCS MOVING INTO THE AREA. 
   
   ORGANIZED MCS ACROSS SERN MO AND NERN AR...MOVING ENEWD AROUND 30
   KT...HAS EXHIBITED A STRONG BOOKEND VORTEX ON ITS NRN FLANK DURING
   THE PAST HOUR. AS THIS FEATURE MOVES INTO VERY MOIST AIR MASS ACROSS
   SRN IL...POTENTIAL FOR DAMAGING WINDS MAY INCREASE. CLEARING BEHIND
   INITIAL CLUSTER OF CONVECTION...WHICH HAS PUSHED SWD INTO NWRN
   TN...HAS ALLOWED FOR AIR MASS RECOVERY ACROSS SRN IL AND SERN MO
   /MLCAPE VALUES AROUND 1000 J/KG/. A SMALL SEVERE THUNDERSTORM WATCH
   MAY BE NEEDED SOON FOR PORTIONS OF THE DISCUSSION AREA.
   
   ..BANACOS.. 06/12/2004
   
   
   ATTN...WFO...PAH...LSX...
   
   36738885 36758972 37119009 37809029 38088992 38348907
   38378849 38218823 37938808 37348817