MESOSCALE DISCUSSION 0795
   NWS STORM PREDICTION CENTER NORMAN OK
   0220 PM CDT MON MAY 11 2009
   
   AREAS AFFECTED...SRN/ERN LA AND SRN MS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 111920Z - 112015Z
   
   THUNDERSTORMS ACROSS WRN LA ARE EXPECTED TO SPREAD ESEWD ACROSS THE
   REGION THIS AFTERNOON. WEAK INSTABILITY IS LIMITING SEVERE
   POTENTIAL...THOUGH DEVELOPMENT OF POSSIBLE COLD POOL AND STRONG
   INSTABILITY INDICATE A POTENTIAL FOR SOME ORGANIZED SEVERE STORMS.
   A SLIGHT RISK WILL BE ADDED TO A PORTION OF THE REGION ON THE 20Z
   DAY 1 OUTLOOK. 
   
   A BAND OF THUNDERSTORMS HAD RECENTLY DEVELOPED ALONG AN OUTFLOW
   BOUNDARY FROM ABOUT 60 SE OF SHV TO 50 WSW POE. THESE STORMS ARE
   LOCATED WITHIN A STRONGLY UNSTABLE AIR MASS WITH MLCAPES UP TO 2500
   J/KG. A STATIONARY FRONT WAS LOCATED NORTH OF THIS CONVECTION ACROSS
   CENTRAL MS/NRN LA. HOWEVER...PROBABLY OF MORE CONVECTIVE
   SIGNIFICANCE WAS A BOUNDARY SHOWN ON SATELLITE AND SURFACE
   OBSERVATIONS FROM NORTH OF POE SEWD INTO FAR SRN MS NEAR GPT. STORMS
   ARE EXPECTED TO TRACK ESEWD ALONG THIS BOUNDARY THROUGH THE
   AFTERNOON. ENVIRONMENTAL WINDS/SHEAR ARE RELATIVELY WEAK...BUT GIVEN
   DEGREE OF INSTABILITY AND IF A COLD POOL DEVELOPS...STRONG/SEVERE
   WINDS GUSTY AND MARGINALLY SEVERE HAIL WOULD BE POSSIBLE WITH THIS
   BAND/LINE OF CONVECTION.
   
   ..IMY.. 05/11/2009
   
   
   ATTN...WFO...MOB...JAN...LIX...LCH...SHV...
   
   LAT...LON   30699323 32019255 31889145 31308867 30798850 30298941
               30389130 30599299 30699323