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Severe Thunderstorm Watch 139
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WW0139 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 139
   NWS STORM PREDICTION CENTER NORMAN OK
   645 PM CDT THU MAR 27 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF CENTRAL AND SOUTHWESTERN ILLINOIS
          PARTS OF EAST CENTRAL AND SOUTHEASTERN MISSOURI
   
   EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 645 PM
   UNTIL 100 AM CDT.
   
   HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF
   MATTOON ILLINOIS TO 15 MILES SOUTH OF WEST PLAINS MISSOURI.  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 138...
   
   DISCUSSION...SEVERE THUNDERSTORMS ONGOING ACROSS CENTRAL/SWRN MO
   AHEAD OF COLD FRONT WILL CONTINUE EWD UNDER STRONG UPPER FLOW. 
   ADDITIONALLY SEVERE THUNDERSTORMS HAVE DEVELOPED NORTH OF FRONTAL
   ZONE ACROSS STL AREA AND WILL MAINTAIN A THREAT OF AT LEAST LARGE
   HAIL INTO CENTRAL IL.  ALONG AND TO THE SOUTH OF THE FRONT...STORMS
   WILL HAVE GREATER POTENTIAL OF DAMAGING WINDS AND THEY EVOLVE MORE
   INTO SHORT LINES/BOWS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 25035.
   
   
   ...HALES
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