MESOSCALE DISCUSSION 0377
   NWS STORM PREDICTION CENTER NORMAN OK
   0310 PM CST FRI APR 04 2003
   
   AREAS AFFECTED...ECNTRL MO...CNTRL/SRN IL AND CNTRL IND
   
   CONCERNING...TORNADO WATCH 85...86...
   
   VALID 042110Z - 042315Z
   
   ...TORNADO THREAT INCREASING ACROSS THE AREA...
   
   SEVERAL DISCRETE SUPERCELLS CONTINUE TO MOVE ENEWD ACROSS THE MS
   RVR NEAR STL INTO CNTRL/SRN IL WHILE POTENTIALLY TORNADIC
   SUPERCELLS MOVE ACROSS CNTRL IL.  LATEST MESOANALYSIS HAS SHOWN A
   TREND IN BACKING AND INCREASING LOW LEVEL FLOW ACROSS CNTRL IL
   INVOF OF A WARM FRONT AND RECENT VWP FROM ILX SHOWS A RATHER LONG
   AND LOOPY HODOGRAPH WITH LOW LEVEL SRH HAVING INCREASED TO ABOVE
   160 M2/S2.  AIR MASS DOWNSTREAM CONTINUES TO BE SUPPORTIVE OF
   TSTMS...AND GIVEN INCREASINGLY FAVORABLE KINEMATICS...SUPERCELLS
   WITH VERY LARGE HAIL...TORNADOES AND DAMAGING WIND GUSTS WILL
   CONTINUE TO DEVELOP.  THESE CELLS WILL BECOME ESPECIALLY CAPABLE
   OF TORNADOES AS THEY MOVE NWD INTO BAROCLINIC ZONE SITUATED FROM
   CMI-DNV-MIE.
   
   ..RACY.. 04/04/2003
   
   
   ATTN...WFO...ILN...IWX...IND...LOT...ILX...LSX...
   
   39389078 40338990 40798883 40918692 40748531 39998501
   39228701 38548995