MESOSCALE DISCUSSION 1750
   NWS STORM PREDICTION CENTER NORMAN OK
   0804 PM CDT WED JUL 09 2003
   
   AREAS AFFECTED...SERN IA / NRN MO / CENTRAL IL / CENTRAL AND SRN IN
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 700...704...
   
   VALID 100104Z - 100200Z
   
   CORRECTED TO ADD WW 705 TO FIRST SENTENCE...
   
   PORTIONS OF TORNADO WATCHES 700...704...AND 705 WILL LIKELY BE
   REPLACED WITH A SEVERE THUNDERSTORM WATCH PRIOR TO THEIR 10/02Z
   EXPIRATION.
   
   EVENING RAOB DATA INDICATES UNSTABLE AIRMASS WITH GENERALLY
   UNIDIRECTIONAL FLOW FROM ERN IA SEWD INTO SWRN OH -- ROUGHLY ALONG
   SURFACE BOUNDARY WHICH EXTENDS SEWD ACROSS THIS AREA.  WIDESPREAD
   CONVECTION CONTINUES ACROSS THIS REGION...AND AS LOW-LEVEL FLOW
   INCREASES ACROSS...EXPECT THUNDERSTORMS TO PERSIST.  AMOUNT OF
   INSTABILITY AND MODERATE / NEARLY UNIDIRECTIONAL FLOW SUGGESTS
   DAMAGING WINDS WILL BE POSSIBLE ALONG WITH MARGINALLY-SEVERE HAIL...
   WITH THE GREATEST SEVERE THREAT LIKELY ACROSS IL WHERE DEEP-LAYER
   WIND FIELD SHOULD STRENGTHEN AHEAD OF APPROACHING TROUGH.
   
   ..GOSS.. 07/10/2003
   
   
   ATTN...WFO...IND...LOT...ILX...LSX...DVN...DMX...EAX...
   
   41749130 41068847 40128680 39238551 38898573 38628712
   38798992 39649207 40349335