MESOSCALE DISCUSSION 0355
   NWS STORM PREDICTION CENTER NORMAN OK
   0952 PM CDT TUE MAR 31 2009
   
   AREAS AFFECTED...FAR ERN LA...SERN MS...CNTRL/SRN AL
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 010252Z - 010445Z
   
   00Z UPR AIR ANALYSIS AND WATER VAPOR LOOPS SHOW THE TAIL END OF A
   MID-LEVEL SHORTWAVE TROUGH MOVING ENE ACROSS THE LWR MS VLY/
   MID-SOUTH.  ASSOCD WEAK LARGE SCALE ASCENT AND MASS CONVERGENCE
   ALONG A WEAK FRONTAL SURGE HAS CONTRIBUTED TO TSTM DEVELOPMENT FROM
   WCNTRL AL SWWD INTO THE NEW ORLEANS METRO AREA.  RICHER LLVL THETA-E
   AIR MASS WAS CONFINED TO THE IMMEDIATE ERN LA/MS/AL CSTS...HAVING
   JUST RETURNED NWD IN WAKE OF THE DEPARTING MCS.  00Z BMX/LIX
   SOUNDINGS EXHIBITED STEEP MID-TROPOSPHERIC LAPSE RATES OF OVER 7 DEG
   C PER KM AND STRONG SHEAR IN THE CLOUD-BEARING LAYER. 
   THUS...STRONGER CELLS MAY PRODUCE ISOLD SVR HAIL THROUGH THE EVENING
   ACROSS PORTIONS OF CNTRL/SRN AL...SERN MS...AND FAR ERN LA.  IN
   ADDITION...A DMGG WIND GUST OR TWO/ISOLD TORNADO CANNOT BE RULED OUT
   WITH THE TSTMS ALONG THE CST WHERE NEAR SFC-BASED UPDRAFTS CAN BE
   MAINTAINED.  ATTM...A WW IS NOT ANTICIPATED GIVEN ISOLD AND SPORADIC
   SVR NATURE.
   
   ..RACY.. 04/01/2009
   
   
   ATTN...WFO...BMX...HUN...MOB...LIX...
   
   LAT...LON   29909003 30628924 33868697 33958633 33238586 32478612
               31648665 30718741 29918836 29909003