MESOSCALE DISCUSSION 0791
   NWS STORM PREDICTION CENTER NORMAN OK
   0729 PM CDT SUN MAY 10 2009
   
   AREAS AFFECTED...PARTS OF SRN AL/MS INTO E CNTRL LA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 286...
   
   VALID 110029Z - 110130Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 286
   CONTINUES.
   
   AN ADDITIONAL WW OR EXTENSION OF CURRENT WW PROBABLY WILL BE NEEDED
   BY 01Z.
   
   BENEATH A NARROW BELT OF 30-40 KT 500 MB FLOW...A SMALL BUT
   ORGANIZED AND VIGOROUS MESOSCALE CONVECTIVE SYSTEM APPEARS LIKELY TO
   CONTINUE EASTWARD ALONG THE INTERSTATE 20 CORRIDOR INTO THE VICINITY
   OF MERIDIAN BY 02Z.  SYSTEM PROBABLY WILL THEN TURN SOUTHEASTWARD
   ALONG AN OUTFLOW BOUNDARY IN THE WAKE OF A DOWNSTREAM STORM
   CLUSTER...ACROSS SOUTHERN ALABAMA INTO AREAS SOUTHWEST OF MONTGOMERY
   THROUGH THE 03-05Z TIME FRAME.  DESPITE THE ONSET OF DIURNAL COOLING
   WITHIN THE BOUNDARY LAYER AIR FEEDING THE STORM
   CLUSTER...STORM-SCALE DYNAMICS COUPLED WITH PERHAPS THE CONTINUING
   INFLUENCE OF AT LEAST WEAK MID/UPPER FORCING...MAY DELAY WEAKENING
   TRENDS ANOTHER FEW HOURS.  
   
   ALONG LOW-LEVEL CONFLUENCE ZONE TRAILING FROM THE LEAD STORM CLUSTER
   SPREADING INTO SOUTHERN ALABAMA...LOCALLY HEAVY RAINFALL PROBABLY
   WILL BECOME THE PRIMARY THREAT ACROSS SOUTHERN MISSISSIPPI INTO EAST
   CENTRAL LOUISIANA AFTER 02Z...ASSOCIATED BY TRAINING CELLS IN THE
   PRESENCE OF HIGH PRECIPITABLE WATER ON THE ORDER OF 2 INCHES.
   
   ..KERR.. 05/11/2009
   
   
   ATTN...WFO...BMX...MOB...JAN...LIX...LCH...SHV...
   
   LAT...LON   32468960 32528881 32408809 32298703 32098664 31618682
               31358740 31338811 31398895 31328983 31199075 31179139
               31609325 31649203 31789052 32468960