MESOSCALE DISCUSSION 0499
   NWS STORM PREDICTION CENTER NORMAN OK
   0536 PM CDT THU APR 29 2004
   
   AREAS AFFECTED...NERN LA / W CENTRAL MS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 124...
   
   VALID 292236Z - 300000Z
   
   SEVERE THREAT CONTINUES ACROSS ERN PORTIONS OF WW...BUT THREAT
   SHOULD DIMINISH SLOWLY WITH TIME.  WILL CONTINUE TO MONITOR AREAS OF
   W CENTRAL MS E OF CURRENT WW...BUT PRIND NEW WW WILL NOT BE
   REQUIRED.
   
   LATEST DATA CONTINUES TO INDICATED MOST UNSTABLE AIRMASS REMAINS
   ACROSS NERN LA...WITH LESS UNSTABLE AIRMASS ACROSS W CENTRAL MS. 
   STORMS CONTINUE MOVING NEWD ACROSS NERN LA INTO W CENTRAL MS...WITH 
   THE TWO STRONGEST STORMS --ONE OVER MADISON PARISH LA AND THE OTHER 
   IN SHARKEY COUNTY MS -- STILL SHOWING SUPERCELL CHARACTERISTICS.
   
   VORT MAX ASSOCIATED WITH STORM CLUSTER -- NOW OVER SERN AR -- WILL
   CONTINUE MOVING NEWD INTO NRN MS WITH TIME...SUGGESTING THAT THE
   STRONGEST DEEP-LAYER FORCING SHOULD SHIFT NE OF MORE UNSTABLE
   AIRMASS.  ADDITIONALLY...FURTHER STABILIZATION OF MS AIRMASS IS
   EXPECTED WITH THE LOSS OF DAYTIME HEATING.  THIS WOULD SUGGEST THAT
   SEVERE THREAT SHOULD SLOWLY DECREASE OVER THE NEXT FEW HOURS. 
   ALTHOUGH THREAT MAY PERSIST FOR 1-2 HOURS BEYOND WATCH EXPIRATION
   AND A ROW OR SO OF COUNTIES EAST OF CURRENT WATCH...IT APPEARS ATTM
   THAT NEW WW MAY NOT BE REQUIRED.
   
   ..GOSS.. 04/29/2004
   
   
   ATTN...WFO...MEG...JAN...LCH...SHV...
   
   33749088 33909040 33828908 31399130 31369221 32149244