MESOSCALE DISCUSSION 1510
   NWS STORM PREDICTION CENTER NORMAN OK
   0718 PM CDT THU JUL 19 2012
   
   AREAS AFFECTED...CNTRL IND INTO FAR SWRN OHIO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 496...
   
   VALID 200018Z - 200145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 496
   CONTINUES.
   
   SUMMARY...STRONG TO SEVERE STORMS ARE EXPECTED TO CONTINUE ACROSS
   E-CNTRL INDIANA INTO W-CNTRL PORTIONS OF OHIO THE NEXT 1-3 HOURS.
   CONVECTION FURTHER S ALONG THE FRONT WILL STRUGGLE AS STORMS MOVE
   INTO A WORKED-OVER AIR MASS.
   
   DISCUSSION...STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE FOR AT
   LEAST A FEW MORE HOURS ACROSS E-CNTRL IND INTO FAR W-CNTRL OHIO. THE
   STRONGEST STORMS ARE EXPECTED ALONG THE INSTABILITY GRADIENT WITH
   THE CLUSTER NEAR/JUST NE OF INDIANAPOLIS. STORMS WILL CONTINUE EWD
   INTO STRONGER DEEP LAYER FLOW AND SUPPORTED BY DEEP LAYER ASCENT
   NOSING INTO THE AREA ASSOCIATED WITH MID-TO-UPPER LEVEL LOW. FURTHER
   SOUTH ALONG AND EAST OF THE FRONT...AIR MASS HAS BEEN WORKED OVER BY
   EARLIER CONVECTION /SEE ILN 00Z RAOB/ AND DEEP LAYER ASCENT/STRONGER
   FLOW WEAKENS CONSIDERABLY. THEREFORE ANY STORMS DEVELOPING/MOVING
   INTO THIS AREA SHOULD POSE LITTLE SEVERE THREAT. THIS SEEMS TO BE
   CONFIRMED BY A WEAKENING TREND OF CONVECTION SOUTH OF THE
   INDIANAPOLIS AREA.
   
   ..LEITMAN.. 07/20/2012
   
   
   ATTN...WFO...ILN...LMK...IWX...IND...LOT...
   
   LAT...LON   40998727 40968433 38668466 38678742 40998727