MESOSCALE DISCUSSION 1278
   NWS STORM PREDICTION CENTER NORMAN OK
   0707 PM CDT MON JUN 22 2009
   
   AREAS AFFECTED...S-CNTRL AND SRN GA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 491...
   
   VALID 230007Z - 230030Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 491
   CONTINUES.
   
   ISOLD DMGG WIND THREAT MAY CONTINUE FOR THE NEXT HOUR OR TWO ACROSS
   S-CNTRL AND SRN GA.  
   
   RADAR MOSAIC AS OF 00Z SHOWS SEVERAL OUTFLOW BOUNDARIES ON THE WRN
   FLANK OF ONGOING STORMS ACROSS FAR SRN/W-CNTRL GA AND WEAKENING
   CLUSTER OVER S-CNTRL GA.  INITIAL BROKEN STORM CLUSTER OVER SRN GA
   /NOW MOVING INTO N FL/ LIKELY CONTRIBUTED TO SUBSTANTIAL
   STABILIZATION BY MEANS OF CONVECTIVE OVERTURNING.  THE MARGINALIZED
   AIRMASS IN PLACE AHEAD OF S-CNTRL GA CONVECTION HAS CONTRIBUTED TO
   ITS WEAKENING AND DIMINISHED SEVERE THREAT.  ASIDE FROM ANY ROBUST
   ACTIVITY THAT MAY FORM ON THE ERN OR WRN FLANKS OF SSEWD MOVING
   STORMS WHERE THE AIRMASS IS MORE UNSTABLE...THE POTENTIAL FOR DMGG
   WINDS IS LESSENING AS THE BOUNDARY LAYER BEGINS TO STABILIZE THIS
   EVENING DUE IN PART TO DIURNAL COOLING/CONVECTIVE OVERTURNING.  AS A
   RESULT...WW MAY BE ALLOWED TO EXPIRE PRIOR TO 02Z EXPIRATION TIME.
   
   ..SMITH.. 06/23/2009
   
   
   ATTN...WFO...CHS...CAE...JAX...FFC...TAE...
   
   LAT...LON   32368447 31948324 31928250 32518230 32818226 32798203
               32148174 31448140 30848158 30648182 30668246 30738341
               30848396 31488436 31958450 32368447