MESOSCALE DISCUSSION 0647
   NWS STORM PREDICTION CENTER NORMAN OK
   0731 PM CDT WED APR 30 2003
   
   AREAS AFFECTED...SRN IA/NRN MO/NRN IL/NRN IND
   
   CONCERNING...TORNADO WATCH 188...189...
   
   VALID 010031Z - 010230Z
   
   SEVERE WEATHER THREAT WILL CONTINUE FOR THE NEXT SEVERAL HOURS INVOF
   WARM FRONT FROM SRN IA EWD ACROSS NRN IL/IND.
   
   LATEST REGIONAL RADAR DATA SHOW SEVERAL INTENSE SUPERCELLS OVER SERN
   IA/NWRN IL MOVING 265/25KT. THESE STORMS ARE MOVING NEARLY PARALLEL
   TO SURFACE WARM FRONT THAT EXTENDS FROM A SURFACE LOW OVER NWRN MO
   ACROSS SERN IA AND THEN EWD ACROSS NRN IL/IND. THE ATMOSPHERE INVOF
   THIS WARM FRONT ACROSS SERN IA INTO NWRN IL REMAINS QUITE FAVORABLE
   FOR TORNADOES WITH 0-1KM SRH OF 100-150 M2/S2 / 0-1KM SHEAR OF
   20-30KT AND LCL HEIGHTS AROUND 800-1000M. SUPERCELLS OVER MERCER CO
   IN NWRN IL WILL BE MOVING OUT OF WW0188 AND INTO WW0189.
   THEREFORE...WW0189 MAY NEED TO BE REPLACED BY TWO SEPARATE WATCHES
   TO ACCOMMODATE ONGOING SEVERE WEATHER THREAT. WRN PORTION OF WW0189
   WOULD BE REPLACED BY A NEW TORNADO WATCH AND ERN PORTION OF THIS
   WATCH WOULD BE REPLACED BY A NEW SEVERE TSTM WATCH WITHIN THE HOUR.
   
   ADDITIONAL STRONG/SVR TSTMS INCLUDING SUPERCELLS WERE OCCURRING
   INVOF SURFACE LOW SWWD ALONG PRE-FRONTAL WIND SHIFT LINE FROM NEAR
   LWD TO N OF MKC. TORNADO THREAT WILL REMAIN GREATEST WITH THE STORMS
   LOCATED AHEAD OF THE SURFACE LOW WHICH IS MOVING EWD ALONG THE WARM
   FRONT.
   
   
   ..MEAD.. 05/01/2003
   
   
   ATTN...WFO...ILX...LSX...DVN...DMX...EAX...OAX...TOP...IWX...LOT...ILX...DVN...
   
   39619518 39809517 40059516 40439523 40649517 40779517
   40809503 41249363 41669230 41979151 42199085 42289053
   42319050 42229051 41649052 40819055 40369052 40209051
   40149051 40099069 39669204 39329322 38939438 38709500
   38629522 38839517 39319518 
   
   41099041 41279042 41699039 41949041 41939029 41948881
   42018611 42078549 42058518 42088494 42018492 41588490
   41028491 40848493 40788498 40788572 40748740 40708848
   40688959 40649010 40669035 40649045 40909043