MESOSCALE DISCUSSION 2015
   NWS STORM PREDICTION CENTER NORMAN OK
   0138 AM CDT FRI AUG 19 2011
   
   AREAS AFFECTED...ERN KS / CNTRL AND SRN MO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 788...789...790...
   
   VALID 190638Z - 190745Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   788...789...790...CONTINUES.
   
   THE SEVERE WEATHER THREAT CONTINUES ACROSS VALID PORTIONS OF WW
   AREAS WITH THE GREATEST POTENTIAL FOR MAINLY DAMAGING WINDS
   SPREADING ESEWD TOWARD JEF AND COU THROUGH 0730Z.
   
   MATURE MCS OVER MO HAS ASSUMED MORE OF AN ELY MOTION WITHIN THE PAST
   HOUR...LIKELY DUE TO THE EVOLUTION OF A MESOSCALE VORTEX AND
   ASSOCIATED BOWING CONFIGURATION LOCATED OVER PETTIS AND BENTON
   COUNTIES MO AS OF 0620Z.  LOCAL RADAR BASE VELOCITY PRODUCTS
   INDICATE A CORRIDOR OF ENHANCED WIND SPEEDS ON IMMEDIATE EQUATORWARD
   SIDE OF VORTEX.  AND EXTRAPOLATED STORM MOTION SUGGESTS THAT THIS
   HIGH MOMENTUM FLOW AND RESULTANT DAMAGING WIND THREAT WILL MOVE INTO
   THE JEF AND COU AREAS WITHIN THE HOUR.
   
   ELSEWHERE...LEADING EDGE OF GUST FRONT HAS PROGRESSED WELL AHEAD OF
   PARENT UPDRAFTS...POTENTIALLY SIGNALING THE ONSET OF DECAY STAGE OF
   MCS AT LEAST ACROSS E-CNTRL/SERN KS INTO W-CNTRL MO.  THOUGH THE
   POTENTIAL FOR DAMAGING WINDS MAY CONTINUE TO DECREASE...ISOLATED
   OCCURRENCES OF HAIL WILL BE POSSIBLE WITH ANY STORMS THAT FORM
   WITHIN ZONE OF ENHANCED ASCENT ATOP SYSTEM COLD POOL.
   
   ..MEAD.. 08/19/2011
   
   
   ATTN...WFO...LSX...LZK...SGF...EAX...TSA...ICT...
   
   LAT...LON   35729508 36309520 37009539 37149581 37879585 38119437
               38759361 39259340 39369295 38649245 38229143 37619066
               36869150 35869207 35729508