MESOSCALE DISCUSSION 1806
   NWS STORM PREDICTION CENTER NORMAN OK
   1130 AM CDT SUN JUL 13 2003
   
   AREAS AFFECTED...SERN AR...NRN MS AND SW TN...
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 131630Z - 131830Z
   
   AREA IS BEING MONITORED FOR THUNDERSTORM DEVELOPMENT. DAMAGING WIND
   AND LARGE HAIL WILL BE POSSIBLE. WW MAY BE NEEDED WITHIN THE NEXT
   HOUR.
   
   AN OUTFLOW BOUNDARY WAS OBSERVED MOVING SEWD THROUGH CNTRL AND SRN
   AR. THE ANVIL SHADOW HAS DELAYED INITIATION ALONG THE SERN PORTION
   OF THE OUTFLOW. HOWEVER...RECENT RADAR IMAGERY SHOW STORMS ARE NOW
   BEGINNING TO DEVELOP. THE ATMOSPHERE HAS BECOME VERY UNSTABLE
   DOWNSTREAM FROM THIS BOUNDARY WITH MLCAPES FROM 2500 TO 3000 J/KG.
   STORMS ALONG THE BOUNDARY WILL LIKELY DEVELOP SEWD INTO THE STRONGER
   INSTABILITY UNDER NWLY FLOW ALOFT. OTHER STORMS MAY DEVELOP FARTHER
   E OVER NRN MS IN AREA OF ENHANCED CUMULUS.
   
   ..DIAL.. 07/13/2003
   
   
   ATTN...WFO...HUN...MEG...JAN...LZK...SHV...
   
   33759358 34599176 35569014 34818804 33469057 33069355