MESOSCALE DISCUSSION 1897
   NWS STORM PREDICTION CENTER NORMAN OK
   0507 PM CDT THU AUG 05 2004
   
   AREAS AFFECTED...FAR E TX...CNTRL LA...SRN MS
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 052207Z - 060000Z
   
   CONVECTIVE LINE FROM ERN TX TO SRN MS WILL HAVE AN ISOLATED WIND
   DAMAGE THREAT FOR AN HOUR OR TWO. A WW IS NOT ANTICIPATED ATTM.
   
   SFC ANALYSIS SHOWS A COLD FRONT EXTENDING WEST TO EAST CURRENTLY
   MOVING SWD THROUGH CNTRL LA. ALTHOUGH DEEP LAYER SHEAR IS FAIRLY
   WEAK...MLCAPE VALUES RANGE FROM 3000 TO 3500 J/KG. THIS WILL BE
   SUFFICIENT FOR STRONG UPDRAFTS. SFC DEWPOINTS IN THE MID 70S F AND
   LOW-LEVEL LAPSE RATES OF 7.5 TO 8.0 C/KM WILL BE SUFFICIENT FOR
   STRONG DOWNBURST WINDS WITH THE STRONGEST CELLS. INSTABILITY WILL
   GRADUALLY DECREASE OVER THE NEXT FEW HOURS AND THE SEVERE THREAT
   SHOULD RAPIDLY DIMINISH EARLY THIS EVENING.
   
   ..BROYLES.. 08/05/2004
   
   
   ATTN...WFO...MOB...JAN...LIX...LCH...SHV...HGX...
   
   32029462 31859306 31938954 30828911 30699294 31179498