MESOSCALE DISCUSSION 0635
   NWS STORM PREDICTION CENTER NORMAN OK
   0519 PM CDT WED APR 29 2009
   
   AREAS AFFECTED...N CNTRL/NERN TX...SWRN AR...NWRN LA
   
   CONCERNING...HEAVY RAINFALL 
   
   VALID 292219Z - 300015Z
   
   HEAVY RAINFALL WILL CONTINUE ACROSS MUCH OF NRN TX AND SWRN
   AR...WHILE GRADUALLY BUILDING SEWD INTO NWRN LA. 1 TO 2 INCH AN HOUR
   WITH ISOLD GREATER RATES CAN BE EXPECTED.
   
   A LONG LIVED MCS...NOW ORIENTED IN SOMEWHAT OF A WAVY LINE ACROSS N
   TX AND INTO SWRN AR...WILL VERY SLOWLY CONTINUE TO BUILD SWD/SEWD
   TOWARDS MODERATE INSTABILITY. FAVORABLE MOISTURE INFLUX IN 30 TO 40
   KT LOW LEVEL SLY WINDS AND WELL ABOVE NORMAL PWAT...NEARLY 200
   PERCENT ABOVE CLIMATOLOGY...HAVE CONTRIBUTED TO VERY HEAVY RAINFALL
   RATES. HOURLY PRECIPITATION ANALYSIS REFLECTS RATES OF GENERALLY 1
   TO 2 INCH AN HOUR...WITH ISOLD 3 INCH AN HOUR RATES...WHILE RECENT
   MESONET DATA HAVE MEASURED GREATER THAN 8 INCHES OF RAINFALL SINCE
   MIDNIGHT NEAR THE CNTRL OK/TX BORDERS. MODEST MEAN FLOW ORIENTED
   NEARLY PARALLEL TO THE LINGERING MCS WILL ALLOW TRAINING STORMS TO
   CONTINUE ALONG THE BOUNDARY. MOVEMENT OF THE MCS WILL BE SLOW...WITH
   PROPAGATION PRIMARILY BEING DOMINATED BY THE MODERATE INSTABILITY TO
   THE S AND E.
   
   ..HURLBUT.. 04/29/2009
   
   
   ATTN...WFO...LZK...SHV...FWD...OUN...
   
   LAT...LON   32849668 32819862 33509876 33889744 33329542 33629475
               34179409 34429356 33929303 33229298 32709345 32349430
               32299555 32559624 32849668