MESOSCALE DISCUSSION 2043
   NWS STORM PREDICTION CENTER NORMAN OK
   0726 PM CDT WED AUG 18 2004
   
   AREAS AFFECTED...SERN NEB / NERN KS / NRN MO / SRN IA / CENTRAL IL /
   SRN IN
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 760...761...
   
   VALID 190026Z - 190230Z
   
   STRONG / SEVERE STORMS CONTINUE ACROSS PARTS OF WW 760 AND 761.  
   
   LATEST RADAR IMAGERY SHOWS STORMS MOVING EWD / ESEWD ACROSS WW 760
   AHEAD OF COLD FRONT...AND ESEWD ACROSS PARTS WW 761 IN REGION OF
   LOW-LEVEL WARM ADVECTION.  INSTABILITY IS WEAKER ACROSS THE WRN HALF
   OF WW 760...AND STORMS SHOULD DIURNALLY WEAKEN ACROSS THIS REGION.  
   
   
   MEANWHILE...MORE UNSTABLE AIRMASS EXISTS FROM SERN IA / NERN MO SEWD
   INTO SRN IN...WHERE STORMS HAVE BEGUN TO EVOLVE INTO A LARGE CLUSTER
   OVER THE PAST HOUR OR SO.  AS LOW-LEVEL JET INCREASES FROM THE WSW
   INTO THIS REGION...EXPECT BOTH PROPAGATIONAL COMPONENT AND
   ORIENTATION OF INSTABILITY AXIS TO RESULT IN ESELY MCS MOTION ACROSS
   WW 761.  ALTHOUGH AN ISOLATED TORNADO CANNOT BE RULED OUT...EXPECT
   LOCALLY DAMAGING WINDS AND HAIL TO BE THE MAIN SEVERE THREATS.
   
   ..GOSS.. 08/19/2004
   
   
   ATTN...WFO...ILN...LMK...IWX...IND...LOT...ILX...LSX...DVN...DMX...EAX...TOP...ICT...
   
   41359127 41278916 39968541 38298530 39749111 39719231
   38939780