MESOSCALE DISCUSSION 0450
   NWS STORM PREDICTION CENTER NORMAN OK
   0437 AM CDT SUN APR 12 2009
   
   AREAS AFFECTED...SOUTHEAST TX
   
   CONCERNING...OUTLOOK UPGRADE 
   
   VALID 120937Z - 121100Z
   
   ASIDE FROM SOUTHERN LA/FAR SOUTHERN MS...THE MODERATE RISK WILL
   LIKELY BE EXPANDED WESTWARD TO INCLUDE PORTIONS OF SOUTHEAST
   TX/UPPER TX COASTAL PLAIN WITH THE 13Z DAY 1 CONVECTIVE OUTLOOK. A
   SURFACE BASED SEVERE THREAT...INCLUDING THE POSSIBILITY OF
   TORNADOES/DAMAGING WINDS AND HAIL...WILL LIKELY STEADILY INCREASE BY
   THE MID/LATE MORNING HOURS. SEE THE PUBLIC SEVERE WEATHER
   OUTLOOK/FORTHCOMING DAY 1 CONVECTIVE OUTLOOK FOR ADDITIONAL
   METEOROLOGICAL DETAILS.
   
   ..GUYER.. 04/12/2009
   
   
   ATTN...WFO...LCH...SHV...HGX...
   
   LAT...LON   29019561 29589637 31039562 31119382 29849396 29019561