MESOSCALE DISCUSSION 1459
   NWS STORM PREDICTION CENTER NORMAN OK
   0207 PM CDT THU JUL 12 2007
   
   AREAS AFFECTED...FAR NERN TX AND SERN OK...SRN AR...NRN LA...WRN MS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 121907Z - 122000Z
   
   STORM COVERAGE IS EXPECTED TO INCREASE THROUGH THE AFTERNOON WITH 
   THREAT OF WET MICROBURSTS. WILL MONITOR FOR POSSIBLE ORGANIZATION.
   
   SURFACE ANALYSIS SHOWS WEAK NW-SE ORIENTED BOUNDARY FROM SERN OK
   INTO WRN MS...WHERE STORMS HAVE ALREADY FORMED.  MCS CONTINUES EWD
   OUT OF OK INTO AR...WITH OUTFLOW BOUNDARY TRAILING BACK WWD ACROSS
   THE RED RIVER. A VERY UNSTABLE AIR MASS HAS DEVELOPED WITH
   PRECIPITABLE WATER VALUES MEASURED BY GPS SENSORS OVER 2.00 INCHES
   IN THIS ZONE. STORMS ARE EXPECTED TO INCREASE ALONG OUTFLOW BOUNDARY
   AND WITHIN WEAK SURFACE TROUGH. DAMAGING WIND GUSTS WILL BE THE
   PRIMARY THREAT ESPECIALLY WITH ANY LARGE/MERGED CLUSTER OF CELLS.
   
   ..JEWELL.. 07/12/2007
   
   
   ATTN...WFO...JAN...LZK...SHV...FWD...
   
   33779603 33889452 34229369 34889286 33799043 33018942
   32168965 32119046 32569268 33369624