MESOSCALE DISCUSSION 0169
   NWS STORM PREDICTION CENTER NORMAN OK
   0638 PM CST FRI FEB 27 2009
   
   AREAS AFFECTED...NERN LA/SERN AR AND EWD INTO PARTS OF MS/AL...
   
   CONCERNING...TORNADO WATCH 38...
   
   VALID 280038Z - 280215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 38 CONTINUES.
   
   SEVERE/ISOLATED TORNADO THREAT CONTINUES -- AND IS EXPECTED TO
   CONTINUE BEYOND THE 28/02Z SCHEDULED EXPIRATION OF WW 0038.  THIS
   WILL LIKELY REQUIRE WW RE-ISSUANCE ACROSS MUCH OF THIS SAME AREA.
   
   LATEST RADAR IMAGERY CONTINUES TO SHOW THE STRONGEST STORMS ACROSS
   CENTRAL AL AND VICINITY ATTM...WITH A RELATIVE LULL IN CONVECTION
   OVER CENTRAL AND WRN MS WWD TO THE MS RIVER.  WHILE A
   SEVERE/ISOLATED TORNADO THREAT REMAINS MOST IMMEDIATE ACROSS
   AL...STORMS ARE EXPECTED TO RE-DEVELOP FARTHER W ACROSS MS AND
   VICINITY AS QG ASCENT INCREASES THIS EVENING AHEAD OF COMPLEX
   SHORT-WAVE TROUGH DIGGING SEWD ACROSS THE PLAINS.  MUCH OF THIS
   CONVECTION WILL LIKELY REMAIN ELEVATED...WITHIN ZONE OF WARM
   ADVECTION/ISENTROPIC ASCENT.  HOWEVER...WITH A WEAK SURFACE WAVE
   PROGGED TO DRIFT ENEWD FROM NERN TX ACROSS THE LOWER MS VALLEY AND
   RESULTING POSSIBILITY OF SOME NWD OSCILLATION OF THE W-E FRONT OVER
   MS/AL...SOME POTENTIAL FOR NEARLY SURFACE-BASED STORMS -- AND
   ASSOCIATED WIND/ISOLATED TORNADO THREAT -- APPEARS POSSIBLE.  THIS
   ZONE OF POTENTIAL SHOULD SET UP ACROSS THE CENTRAL THIRDS OF MS AND
   AL LATER THIS EVENING...IN THE WAKE OF THE INITIAL CLUSTER OF STORMS
   NOW ONGOING OVER CENTRAL AR.
   
   ..GOSS.. 02/28/2009
   
   
   ATTN...WFO...FFC...TAE...BMX...MOB...MEG...JAN...SHV...
   
   LAT...LON   32949232 33209201 33749025 33548577 32408471 31268494
               32109179 32949232