MESOSCALE DISCUSSION 0367
   NWS STORM PREDICTION CENTER NORMAN OK
   1151 AM CDT THU APR 02 2009
   
   AREAS AFFECTED...MS...SE LA
   
   CONCERNING...TORNADO WATCH 105...106...
   
   VALID 021651Z - 021815Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 105...106...CONTINUES.
   
   DEEPENING CONVECTIVE DEVELOPMENT IS EVIDENT ALONG AN APPARENT
   GRAVITY WAVE NOW ADVANCING TOWARD THE I-55 CORRIDOR OF MISSISSIPPI. 
   HOWEVER...AS REFLECTED IN 15Z RAOBS FROM SLIDELL AND JACKSON...THE
   AIR MASS AHEAD OF THIS ACTIVITY IS RELATIVELY DRY...WARM AND CAPPED.
    MOISTENING IS OCCURRING IN THE WAKE OF THE LOW-LEVEL FEATURE...AND
   THIS MAY SERVE TO CONTRIBUTE TO SUFFICIENT DESTABILIZATION FOR
   INCREASING CONVECTIVE DEVELOPMENT ACROSS CENTRAL MISSISSIPPI DURING
   THE NEXT FEW HOURS...AS A FAIRLY DEEP CONVECTIVELY GENERATED SURFACE
   COLD POOL ADVANCES EAST OF THE MISSISSIPPI VALLEY.
   
   A SIGNIFICANT STORM CLUSTER HAS ALREADY EVOLVED ALONG THIS
   OUTFLOW...WHERE IT INTERSECTS ANOTHER STALLED OUTFLOW BOUNDARY NEAR
   CENTRAL GULF COASTAL AREAS.  AIDED BY A DIFLUENT UPPER FLOW REGIME
   BETWEEN THE POLAR AND SUBTROPICAL JETS...THIS ACTIVITY COULD
   CONTINUE TO GROW UPSCALE INTO A MUCH LARGER CONVECTIVE SYSTEM ACROSS
   SOUTHEASTERN LOUISIANA AND SOUTHERN MISSISSIPPI DURING THE NEXT FEW
   HOURS.  WITHIN A 40-50 KT DEEP LAYER WEST SOUTHWESTERLY MEAN FLOW
   REGIME...THIS WILL BE ACCOMPANIED BY A CONSIDERABLE RISK FOR
   STRONG...POTENTIALLY DAMAGING WINDS GUSTS.
   
   ALTHOUGH LOW-LEVEL HODOGRAPHS NEAR THE EVOLVING MOST INTENSE LEADING
   CONVECTIVE LINE MAY TEND TO BECOME SOMEWHAT UNIDIRECTIONAL ...SHEAR
   SHOULD REMAIN SUFFICIENT FOR ISOLATED TORNADOES WITHIN THE LINE.
   
   ..KERR.. 04/02/2009
   
   
   ATTN...WFO...BMX...MOB...MEG...JAN...LIX...LCH...
   
   LAT...LON   29359197 29899165 31609104 32749071 33509009 33868904
               33418843 31988842 30718859 29238997 29359197