MESOSCALE DISCUSSION 0902
   NWS STORM PREDICTION CENTER NORMAN OK
   0937 AM CDT TUE MAY 13 2008
   
   AREAS AFFECTED...CNTRL/ERN TX...NWRN LA...SERN AR
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 131437Z - 131530Z
   
   THUNDERSTORMS ARE LIKELY TO CONTINUE INCREASING IN COVERAGE AND
   INTENSITY OVER NORTHEAST TX TODAY...SPREADING INTO PARTS OF AR/LA
   THIS AFTERNOON.  AREA WILL LIKELY REQUIRE A WATCH SOON.
   
   SCATTERED THUNDERSTORMS ARE ONGOING THIS MORNING ALONG AN AXIS FROM
   CENTRAL TX INTO AR/TN.  THIS IS IN REGION OF RELATIVELY STRONG LOW
   LEVEL WARM ADVECTION ALONG EDGE OF LOW LEVEL JET.  MORNING SOUNDINGS
   SHOWED VERY STEEP MID LEVEL LAPSE RATES AND SUBSTANTIAL ELEVATED
   CAPE.  RAPID MOISTURE ADVECTION NEAR THE SURFACE WILL FURTHER
   DESTABILIZE REGION AND LEAD TO INCREASED CONVECTION THROUGH THE DAY.
    MULTICELL AND SUPERCELL STORM STRUCTURES ARE EXPECTED WITH LARGE
   HAIL BEING THE MAIN THREAT.  TRENDS ARE BEING MONITORED FOR A SEVERE
   THUNDERSTORM WATCH SOON.
   
   ..HART.. 05/13/2008
   
   
   ATTN...WFO...LZK...SHV...TSA...HGX...FWD...EWX...SJT...
   
   32219905 33199738 33849556 34209320 33379228 32029279
   31239433 30629608 30459742 30719896 31389932