MESOSCALE DISCUSSION 0686
   NWS STORM PREDICTION CENTER NORMAN OK
   0924 AM CDT SUN MAY 03 2009
   
   AREAS AFFECTED...LA...MS...NWRN AL...SERN TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 231...232...
   
   VALID 031424Z - 031530Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   231...232...CONTINUES.
   
   WELL DEFINED...FAST-MOVING DERECHO IS PROGRESSING EWD ACROSS LA AT
   ROUGHLY 60KT.  THIS MCS WILL SOON OVERTAKE A DISCRETE
   SUPERCELL...TENSAS PARISH LA...THAT HAS DEVELOPED ALONG WRN FLANK OF
   OUTFLOW FROM MS CONVECTION.  AT THE CURRENT SPEED IT APPEARS THE
   DERECHO WILL BE DEEP INTO WW232 BY 16Z...POSSIBLY NEAR THE AL BORDER
   BY 17Z.  NEEDLESS TO SAY THE DAMAGING WIND POTENTIAL IS QUITE HIGH
   AHEAD OF BOW APEX ALONG TRAILING OUTFLOW.
   
   ..DARROW.. 05/03/2009
   
   
   ATTN...WFO...BMX...MOB...MEG...JAN...LIX...LCH...SHV...HGX...
   
   LAT...LON   31659449 33878798 32648687 30139114 29679484 31659449