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Severe Thunderstorm Watch 710
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WW0710 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 710
   NWS STORM PREDICTION CENTER NORMAN OK
   210 PM CDT SUN JUL 20 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF EASTERN ILLINOIS
          PARTS OF CENTRAL AND SOUTHERN INDIANA
          SMALL PART OF NORTHERN KENTUCKY
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 800
   PM CDT.
   
   HAIL TO 2 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 NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST
   OF DECATUR ILLINOIS TO 90 MILES EAST SOUTHEAST OF INDIANAPOLIS
   INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 708...WW 709...
   
   DISCUSSION...A VERY WARM AND UNSTABLE AIR MASS NOW IN PLACE ACROSS
   THE WATCH AREA.  WITH 30-35KT OF SHEAR AND MLCAPES TO 3000
   J/KG...STORMS EXPECTED TO INCREASE IN NUMBER AND INTENSITY.  WIND
   DAMAGE WILL BE THE PRIMARY THREAT AS STORMS DEVELOP INTO LINE
   SEGMENTS AND MULTICELL CLUSTERS.
   
   AVIATION...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 550. MEAN STORM
   MOTION VECTOR 29030.
   
   
   ...HALES
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