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Severe Thunderstorm Watch 484
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WW0484 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Low Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 484
   NWS STORM PREDICTION CENTER NORMAN OK
   1250 AM EDT SAT JUN 20 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEAST INDIANA
          NORTHERN KENTUCKY
          SOUTHERN HALF OF OHIO
          CENTRAL AND NORTHWEST WEST VIRGINIA
   
   EFFECTIVE THIS SATURDAY MORNING FROM 1250 AM UNTIL 700 AM EDT.
   
   HAIL TO 1.5 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 65
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF
   CINCINNATI OHIO TO 55 MILES EAST SOUTHEAST OF PARKERSBURG WEST
   VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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 483...
   
   DISCUSSION...EARLIER CONVECTION WEAKENED ACROSS SE INDIANA...BUT A
   NEW CONVECTIVE LINE IS EVOLVING FARTHER TO THE W.  THIS CONVECTION
   APPEARS TO BE MORE CLOSELY PHASED WITH MID LEVEL JET ASSOCIATED WITH
   THE SHORTWAVE TROUGH PASSING JUST N OF THE WATCH AREA...AND RECENT
   RADAR IMAGERY SUGGESTS AN ACCELERATED EWD MOTION OF 45-55 KT.  GIVEN
   THE PRESENCE OF LINGERING MODERATE INSTABILITY IN THE WARM SECTOR
   AND INCREASING LOW-MID LEVEL FLOW WITH TIME FROM THE W...THERE WILL
   BE THE POTENTIAL FOR A CORRIDOR OF DAMAGING WINDS OVERNIGHT FROM SE
   INDIANA ALONG THE OH RIVER INTO WV.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 27045.
   
   
   ...THOMPSON
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