MESOSCALE DISCUSSION 1768
   NWS STORM PREDICTION CENTER NORMAN OK
   0549 AM CDT TUE AUG 04 2009
   
   AREAS AFFECTED...SERN NEB...NERN KS AND NWRN MO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 653...
   
   VALID 041049Z - 041145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 653
   CONTINUES.
   
   THREAT FOR ISOLATED DAMAGING WIND AND LARGE HAIL WILL CONTINUE OVER
   SERN NEB...NERN KS...AND NW MO NEXT HOUR. HOWEVER...SEVERE THREAT
   OVER REMAINING PARTS OF WW 653 SHOULD DECREASE BY 12Z.
   
   CONVECTIVE OUTFLOW BOUNDARY LOCATED FROM EXTREME SERN NEB INTO NERN
   KS IS MOVING EAST AT AROUND 55 KT. NRN PORTION OF THIS BOUNDARY IS
   MOVING INTO AIR THAT HAS BEEN LARGELY OVERTURNED. HOWEVER...NEW
   DEVELOPMENT IS OCCURRING ALONG THE SRN FLANKS ACROSS NERN KS WHERE
   TOPEKA LOCAL RADAR INDICATES SEVERAL OUTFLOW MERGERS AND WHERE A
   CORRIDOR OF MODERATE INSTABILITY STILL EXISTS. THESE STORMS WILL
   REMAIN CAPABLE OF PRODUCING ISOLATED LARGE HAIL AND DAMAGING WIND AS
   THEY PEAK IN INTENSITY DURING THE NEXT HOUR. THE STORMS SHOULD BEGIN
   TO MOVE INTO WRN PORTIONS OF WW 654 BY 12Z WHERE THEY MAY
   SUBSEQUENTLY WEAKEN AS THEY ENCOUNTER AIR THAT HAS BEEN PARTIALLY
   STABILIZED BY PREVIOUS CONVECTION.
   
   ..DIAL.. 08/04/2009
   
   
   ATTN...WFO...EAX...OAX...TOP...
   
   LAT...LON   40519564 40329509 39899504 39439513 39449580 39969572
               40519564