MESOSCALE DISCUSSION 2029
   NWS STORM PREDICTION CENTER NORMAN OK
   0742 PM CDT SAT AUG 20 2011
   
   AREAS AFFECTED...SRN MO/NRN AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 793...
   
   VALID 210042Z - 210215Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 793
   CONTINUES.
   
   MULTIPLE STORM MERGERS HAVE OCCURRED ACROSS WW793 WITHIN STRONG ZONE
   OF INSTABILITY.  NET RESULT HAS BEEN FOR A LOOSELY ORGANIZED MCS TO
   EVOLVE ACROSS SRN MO/NRN AR WITH A GRADUALLY EXPANDING/SEWD SAGGING
   COMPLEX THAT SHOULD SETTLE INTO THE SRN HALF OF THE WATCH OVER THE
   NEXT FEW HOURS.  GIVEN THAT THE STRONGEST INSTABILITY IS ALONG THE
   SRN-WRN FLANK OF THIS ACTIVITY IT APPEARS THE GREATEST LONG TERM
   SEVERE THREAT WILL FOCUS ACROSS NRN AR BY 02Z.
   
   ..DARROW.. 08/21/2011
   
   
   ATTN...WFO...PAH...MEG...LSX...LZK...SGF...TSA...
   
   LAT...LON   37479343 37489106 35509117 35509345 37479343