MESOSCALE DISCUSSION 1904
   NWS STORM PREDICTION CENTER NORMAN OK
   0337 PM CDT THU SEP 06 2012
   
   AREAS AFFECTED...SERN MO...FAR SRN IL/WRN KY/NWRN TN/NERN AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 625...
   
   VALID 062037Z - 062200Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 625
   CONTINUES.
   
   SUMMARY...MCS WILL LIKELY PROGRESS E/SEWD WITH A SCATTERED DAMAGING
   WIND THREAT PERSISTING. A NEW WW DOWNSTREAM OF WW 625 MAY BECOME
   NECESSARY IN THE NEXT COUPLE OF HOURS.
   
   DISCUSSION...MCS CENTERED IN SERN MO HAS CONTINUED TO INCREASE IN
   SPATIAL EXTENT AS IT OVERTAKES NEARLY STATIONARY CELLS ALONG A
   LOW-LEVEL CONFLUENCE AXIS EXTENDING EWD INTO FAR SRN IL. GIVEN A
   STRONGLY BUOYANT AIR MASS DOWNSTREAM AND COLD POOL TEMPERATURES IN
   THE 60S...POTENTIAL WILL EXIST FOR THE MCS TO ACCELERATE TO E/SE.
   ALTHOUGH THIS MCS MAY BE LARGELY CONTAINED WITHIN WW 625 IN THE NEXT
   COUPLE OF HOURS...THE ATTENDANT DAMAGING WIND THREAT /REF 46 KT GUST
   AT KVIH AT 2001Z/ SHOULD PERSIST THROUGH SUNSET AND WILL PROBABLY
   DEVELOP E OF THE WW BOUNDS.
   
   ..GRAMS.. 09/06/2012
   
   
   ATTN...WFO...PAH...MEG...LSX...LZK...SGF...
   
   LAT...LON   36919201 37679158 38389145 38669153 38809079 38538954
               38268894 37958836 37618814 37388815 37008843 36548885
               36038953 36039034 36569162 36919201