MESOSCALE DISCUSSION 1873
   NWS STORM PREDICTION CENTER NORMAN OK
   1134 PM CDT TUE AUG 03 2004
   
   AREAS AFFECTED...SRN IA AND NRN MO
   
   CONCERNING...HEAVY RAINFALL...SEVERE THUNDERSTORM WATCH 703...
   
   VALID 040434Z - 040600Z
   
   RAINFALL RATES OF 2-3 INCHES PER HOUR ARE LIKELY NEAR THE IA/MO
   BORDER DURING THE NEXT COUPLE OF HOURS. DAMAGING WIND THREAT
   CONTINUES FOR THE SAME GENERAL AREA AND MAY INCREASE SHORTLY.
   
   ONE LINE OF STORMS EXTENDS FROM EAST OF OTM TO 30 NW OF IRK...WHILE
   ANOTHER STRETCHES FROM SE OF DSM TO LWD TO 40 N STJ. THE FIRST LINE
   HAS SLOWED IN RESPONSE TO THE LINE BEHIND IT AND A HEAVY RAIN THREAT
   EXTENDS FROM EAST OF LWD TO 40 N OF IRK. HOWEVER..THE SECOND LINE IS
   EXPECTED TO BEGIN FORWARD PROPAGATING AS THE LOW LEVEL JET SLOWLY
   VEERS FROM SWLY TO WLY AND THE COLD POOL AIDS IN A SEWD ACCELERATION
   INTO NORTH CENTRAL MO. SURFACE DEWPOINTS IN THE UPPER 70S AND STEEP
   MID LEVEL LAPSE RATES ARE RESULTING IN MUCAPES FROM 3000 TO 4000
   J/KG WHICH ARE FAVORABLE FOR WIND DAMAGE AND VERY HEAVY RAINFALL.
   
   ..IMY.. 08/04/2004
   
   
   ATTN...WFO...DVN...DMX...EAX...
   
   40329230 40369281 40539322 40739316 40839310 40789249
   40739187 40689128 40379139