MESOSCALE DISCUSSION 0903
   NWS STORM PREDICTION CENTER NORMAN OK
   0853 PM CDT SAT MAY 30 2009
   
   AREAS AFFECTED...ERN IL/CENTRAL AND SRN IND/SRN OH/NRN KY/WV
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 316...317...
   
   VALID 310153Z - 310300Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   316...317...CONTINUES.
   
   ASCENT WITHIN EXIT REGION OF 50 KT WNWLY MID LEVEL JET SPREADING
   INTO THE OH VALLEY COMBINED WITH MODERATE INSTABILITY...ESPECIALLY
   ACROSS THE LOWER OH VALLEY...AND STRONG DEEP LAYER SHEAR WILL
   MAINTAIN LIKELIHOOD FOR ADDITIONAL ORGANIZED STORMS.
   
   REGIONAL RADARS/LIGHTNING DATA INDICATED MORE PERSISTENT TSTM
   ACTIVITY REMAINS LOCATED NEAR THE SURFACE LOW...NOW MOVING ESEWD
   INTO CENTRAL IND...AND SEWD IN THE VICINITY OF THE SURFACE FRONT
   EXTENDING THROUGH SWRN OH TO CENTRAL/SRN WV.  30-40 KT WSWLY LOW
   LEVEL JET EXTENDING FROM SERN MO INTO SRN OH/KY WILL CONTINUE TO
   MAINTAIN INFLOW OF MOIST/MODERATELY UNSTABLE AIR MASS INTO ONGOING
   STORMS FROM CENTRAL IND TO SRN OH/NERN KY/WV.  ADDITIONAL STORMS
   HAVE ALSO RECENTLY INCREASED ACROSS SWRN IND/ADJACENT KY.  
   
   ALTHOUGH LOW LEVEL DIRECTIONAL SHEAR...ESPECIALLY IN THE VICINITY OF
   THE FRONT EXTENDING SEWD FROM THE IND SURFACE LOW...HAS SUPPORTED
   LOW LEVEL STORM ROTATION...INCREASING SURFACE BASED INHIBITION
   SHOULD TEND TO LESSEN THE TORNADO THREAT.  HAIL AND STRONG WIND
   GUSTS WILL CONTINUE TO BE POSSIBLE WITH THE STRONGEST ACTIVITY THIS
   EVENING.
   
   ..PETERS.. 05/31/2009
   
   
   ATTN...WFO...RNK...RLX...MRX...JKL...ILN...LMK...IWX...IND...
   PAH...ILX...LSX...
   
   LAT...LON   38348978 39158959 39998803 40618664 40438503 40078404
               39658288 39368159 38578055 37848058 37408130 36998219
               37608502 38068724 38348978