MESOSCALE DISCUSSION 0263
   NWS STORM PREDICTION CENTER NORMAN OK
   0637 PM CDT WED MAR 23 2011
   
   AREAS AFFECTED...CENTRAL IND INTO FAR WEST CENTRAL OH
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 232337Z - 240100Z
   
   ISOLATED THREAT FOR PRIMARILY HAIL WILL CONTINUE EARLY THIS EVENING
   ACROSS CENTRAL INDIANA AND MAY SPREAD EWD INTO FAR WEST CENTRAL OH. 
   SHORT DURATION OF THIS THREAT.../I.E. PRIOR TO THE ONSET OF DIURNAL
   COOLING/ DOES NOT WARRANT THE NEED FOR A WW.
   
   LATEST SURFACE/OBJECTIVE ANALYSES SHOWED A COLD FRONT EXTENDING
   WNWWD FROM SRN OH TO AN AREA OF LOW PRESSURE LOCATED OVER FAR SWRN
   OH/SERN IND...AND A SECOND AREA OF LOW LEVEL CONVERGENCE ATTENDANT
   TO AN OUTFLOW BOUNDARY EXTENDING GENERALLY WWD THROUGH CENTRAL IND. 
   FORCING ALONG THESE BOUNDARIES COMBINED WITH STRONG DEEP LAYER
   ASCENT WITH A COMPACT SHORTWAVE TROUGH TRACKING EWD THROUGH IL/IND
   AT THIS TIME WILL REMAIN SUPPORTIVE OF SUSTAINED UPDRAFTS...DESPITE
   RATHER MARGINAL INSTABILITY.  THE RECENT STRONG TO SEVERE STORMS IN
   CENTRAL IND HAVE DEVELOPED WITHIN A STEEP LAPSE RATE ENVIRONMENT
   /BOTH AT LOW AND MID LEVELS/.  THUS...GIVEN CONTINUED COLD ADVECTION
   AT MIDLEVELS /-26 C AT 500 MB/ AND EFFECTIVE BULK SHEAR 40-50
   KT...HAIL SHOULD REMAIN THE PRIMARY THREAT...ESPECIALLY WITH
   SUPERCELLS.
   
   ..PETERS.. 03/23/2011
   
   
   ATTN...WFO...ILN...IWX...IND...
   
   LAT...LON   40138730 40398652 40408512 40308449 39738453 39378498
               39568619 39638729 40138730