MESOSCALE DISCUSSION 1178
   NWS STORM PREDICTION CENTER NORMAN OK
   1056 PM CDT FRI JUN 10 2011
   
   AREAS AFFECTED...FAR SE KS...SCNTRL MO...SCNTRL IL...WRN IND
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 458...461...
   
   VALID 110356Z - 110530Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   458...461...CONTINUES.
   
   A SEVERE THREAT IS EXPECTED TO CONTINUE ACROSS PARTS OF WW 458 AND
   461 THROUGH THE 05Z WATCH EXPIRATIONS. WIND DAMAGE AND HAIL SHOULD
   BE THE PRIMARY THREATS AND A FEW AREAS MAY NEED WW EXTENSIONS FOR A
   FEW HOURS AFTER 05Z.
   
   SEVERAL CLUSTERS OF STRONG TO SEVERE THUNDERSTORMS ARE ONGOING FROM
   ERN MO ENEWD ACROSS SCNTRL IL. THE STORMS ARE LOCATED ALONG THE NRN
   EDGE OF MODERATE INSTABILITY WHERE MESOANALYSIS INDICATES MLCAPE
   VALUES RANGE FROM 1000 TO 2000 J/KG. THE ERN MOST CLUSTER IS
   ASSOCIATED WITH A SHORTWAVE TROUGH EVIDENT ON WATER VAPOR IMAGERY.
   LIFT ASSOCIATED WITH THE SHORTWAVE TROUGH ALONG WITH THE MODERATE
   INSTABILITY IN SCNTRL IL AND WRN IND MAY ALLOW A WIND DAMAGE THREAT
   TO CONTINUE FOR A FEW MORE HOURS. HOWEVER...THE THREAT SHOULD BECOME
   INCREASINGLY ISOLATED AS INSTABILITY GRADUALLY WEAKENS.
   
   FURTHER TO THE SOUTHWEST...A CLUSTER OF STRONG THUNDERSTORMS IN SE
   KS AND SW MO IS LOCATED ON THE NERN EDGE OF A PLUME OF STEEP
   MID-LEVEL LAPSE RATES. THIS ALONG WITH MODERATE INSTABILITY IN SW MO
   MAY CONTINUE A THREAT FOR HAIL. WIND DAMAGE WILL ALSO BE POSSIBLE
   ESPECIALLY IF A SHORT BOWING LINE-SEGMENT CAN ORGANIZE AND PERSIST.
   
   ..BROYLES.. 06/11/2011
   
   
   ATTN...WFO...IND...PAH...ILX...LSX...SGF...EAX...TSA...
   
   LAT...LON   40328718 40378847 39389036 38609229 37759485 36879495
               37529034 39178734 40328718