MESOSCALE DISCUSSION 0488
   NWS STORM PREDICTION CENTER NORMAN OK
   0539 AM CDT WED APR 20 2011
   
   AREAS AFFECTED...PARTS OF NERN AL...NRN GA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 166...
   
   VALID 201039Z - 201145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 166
   CONTINUES.
   
   TRENDS WILL CONTINUE TO BE MONITORED FOR THE POSSIBILITY OF A NEW WW
   ACROSS NORTHERN GEORGIA.
   
   A MODESTLY STRONG AND ORGANIZED MESOSCALE CONVECTIVE SYSTEM HAS
   EVOLVED ACROSS NORTHEAST MISSISSIPPI INTO NORTHERN ALABAMA...AND IS
   ADVANCING EASTWARD AROUND 50 KTS.  AT THIS MOVEMENT...ACTIVITY WILL
   BEGIN PROGRESSING EAST OF WW 166 INTO NORTHERN GEORGIA BETWEEN
   11-12Z.  WHILE THE ENVIRONMENT ACROSS NORTHERN GEORGIA IS SLOWLY
   MOISTENING...IT REMAINS CONSIDERABLY DRIER AND MORE STABLE THAN THAT
   WHICH EXISTS TO THE WEST.  AS SYSTEM-RELATIVE EASTERLY LOW-LEVEL
   INFLOW BEGINS TO CIRCULATE THIS AIR INTO THE CONVECTIVE SYSTEM...IT
   SEEMS LIKELY TO CONTRIBUTE TO WEAKENING TRENDS.  COUPLED WITH THE
   LOSS OF UPPER SUPPORT...SHIFTING NORTHEAST OF THE UPPER TENNESSEE
   VALLEY...IT IS NOT CERTAIN THAT A NEW WW WILL BE NEEDED.
   
   ..KERR.. 04/20/2011
   
   
   ATTN...WFO...GSP...FFC...BMX...HUN...
   
   LAT...LON   34108590 34908548 34878455 34588341 33928279 33408343
               33228453 33378587 33518654 34108590