T-storm Watch for NW KY till Noon

SEL9
 
  URGENT - IMMEDIATE BROADCAST REQUESTED
  SEVERE THUNDERSTORM WATCH NUMBER 459
  NWS STORM PREDICTION CENTER NORMAN OK
  730 AM EDT THU JUN 18 2009
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
 
         SOUTHEAST ILLINOIS
         CENTRAL AND SOUTHERN INDIANA
         CENTRAL KENTUCKY
 
  EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 730 AM UNTIL
  100 PM EDT.
 
  HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
  MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
 
  THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
  STATUTE MILES EITHER SIDE OF A LINE FROM 25 MILES SOUTHEAST OF
  LOUISVILLE KENTUCKY TO 50 MILES WEST SOUTHWEST OF TERRE HAUTE
  INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
  ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
 
  REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
  FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
  AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
  THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
  AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
  DO PRODUCE TORNADOES.
 
  OTHER WATCH INFORMATION...CONTINUE...WW 457...WW 458...
 
  DISCUSSION...MATURE BOW ECHO TRACKING ACROSS CENTRAL IL IS LIKELY TO
  PERSIST THROUGH THE MORNING HOURS AND TRACK INTO SOUTHERN IND AND
  CENTRAL KY.  STORMS ARE MOVING ALONG A STRONG INSTABILITY GRADIENT
  AND SHOW CONSIDERABLE MESOSCALE ORGANIZATION.  THIS IS EXPECTED TO
  MAINTAIN RISK OF DAMAGING WINDS ACROSS THE WATCH AREA.
 
  AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
  TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
  KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
  MOTION VECTOR 31040.
 
 
  ...HART