MESOSCALE DISCUSSION 1203
   NWS STORM PREDICTION CENTER NORMAN OK
   0139 PM CDT WED JUN 04 2008
   
   AREAS AFFECTED...PARTS OF SRN IL...CNTRL/SRN IND...SRN OH...NRN/ERN
   KY AND WV
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 041839Z - 042015Z
   
   WW 446 MAY NEED TO BE REPLACED WITH A NEW WW BY 20Z.  AN ADDITIONAL
   WW MAY BE NEEDED WEST OF WW 446 LATE THIS AFTERNOON.
   
   IN THE WAKE OF LOW AMPLITUDE TROUGHING PROGRESSING INTO THE UPPER
   OHIO VALLEY...AND ANOTHER IMPULSE LIFTING THROUGH AN INCREASINGLY
   ANTICYCLONIC MID/UPPER FLOW REGIME ACROSS THE CENTRAL STATES
   ...SHORT WAVE RIDGING IS BUILDING TOWARD THE MIDDLE
   MISSISSIPPI/LOWER OHIO VALLEYS.  AND...CONFLUENT LOWER/MID
   TROPOSPHERIC REGIME ON ITS  NORTHERN/EASTERN PERIPHERY IS BECOMING
   THE FOCUS FOR INCREASING CONVECTIVE DEVELOPMENT...FROM PARTS OF
   SOUTHERN ILLINOIS EASTWARD THROUGH WEST VIRGINIA.  INCREASING/
   INTENSIFYING STORMS SHOULD REMAIN THE GENERAL TREND THROUGH THE REST
   OF THE AFTERNOON.  THROUGH THE PEAK HEATING HOURS AND
   BEYOND...ACTIVITY IS EXPECTED TO GRADUALLY BECOME MORE ROOTED IN A
   MIXED BOUNDARY LAYER WITH CAPE APPROACHING/EXCEEDING 2000 J/KG. 
   MODELS ARE SUGGESTIVE THAT WESTERLY TO NORTHWESTERLY MID-LEVEL FLOW
   FIELDS WILL WEAKEN SOMEWHAT...BUT DEEP LAYER SHEAR SHOULD STILL
   REMAIN SUFFICIENT FOR SUPERCELLS AND ORGANIZED STORM CLUSTERS WITH
   THE RISK FOR DAMAGING WINDS AND HAIL.
   
   ..KERR.. 06/04/2008
   
   
   ATTN...WFO...RNK...RLX...JKL...ILN...LMK...IND...PAH...ILX...
   
   38808816 40318846 40328586 39658376 39478282 39248172
   38928027 37838023 37178191 37708383 38088598 37878734
   38358835 38358831