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Severe Thunderstorm Watch 654
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WW0654 Radar
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
   0-
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 654
   NWS STORM PREDICTION CENTER NORMAN OK
   310 PM CDT WED JUL 2 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF EASTERN IOWA
          MUCH OF NORTHERN ILLINOIS
          PARTS OF NORTHERN INDIANA
          SOUTHERN LOWER MICHIGAN
          PARTS OF NORTHWEST OHIO
          PARTS OF SOUTHERN WISCONSIN
          LAKE ERIE
          LAKE HURON
          LAKE MICHIGAN
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 310 PM UNTIL
   1000 PM CDT.
   
   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 60
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH
   SOUTHEAST OF MOUNT CLEMENS MICHIGAN TO 35 MILES SOUTHWEST OF
   DUBUQUE IOWA.  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...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 651. WATCH NUMBER 651 WILL NOT
   BE IN EFFECT AFTER 310 PM CDT. CONTINUE...WW 652...WW 653...
   
   DISCUSSION...SEVERE THUNDERSTORMS ARE EXPECTED TO CONTINUE
   DEVELOPING AHEAD OF THE COLD FRONT IN A VERY MOIST...UNSTABLE AIR
   MASS. WITH 30-40 KT OF SHEAR...STORMS ARE EVOLVING INTO LINE
   SEGMENTS/BOW ECHOES AS THEY MOVE RAPIDLY EWD.  PRIMARY THREAT WILL
   BE DAMAGING WINDS.
   
   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 550. MEAN STORM
   MOTION VECTOR 27040.
   
   
   ...HALES
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