SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 66
   NWS STORM PREDICTION CENTER NORMAN OK
   955 PM CST SAT MAR 11 2006
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN ILLINOIS
   
   EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 955 PM UNTIL
   400 AM CST.
   
   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 35 STATUTE MILES
   EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHEAST OF MOUNT
   VERNON ILLINOIS TO 15 MILES SOUTH SOUTHEAST OF CARBONDALE
   ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 63...WW 64...WW 65...
   
   DISCUSSION...CLUSTER OF SUPERCELL THUNDERSTORMS WILL CONTINUE TO
   TRACK EASTWARD INTO PARTS OF SOUTHERN IL OVER THE NEXT FEW
   HOURS...POSING A CONTINUED THREAT OF LARGE HAIL AND TORNADOES. 
   ACTIVITY MAY SLOWLY WEAKEN AFTER MIDNIGHT AS AIR MASS STABILIZES AND
   STORMS MOVE EAST OF PRIMARY LOW LEVEL THETAE AXIS.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
   MEAN STORM MOTION VECTOR 25035.
   
   
   ...HART