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Severe Thunderstorm Watch 642
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WW0642 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 642
   NWS STORM PREDICTION CENTER NORMAN OK
   410 PM EDT SUN JUN 29 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          WESTERN CONNECTICUT
          WESTERN MASSACHUSETTS
          MUCH OF NEW JERSEY
          MUCH OF EASTERN NEW YORK
          MUCH OF CENTRAL AND EASTERN PENNSYLVANIA
          PARTS OF SOUTHERN VERMONT
          COASTAL WATERS
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 410 PM UNTIL
   1100 PM EDT.
   
   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 125
   STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTH OF
   HARRISBURG PENNSYLVANIA TO 45 MILES NORTH NORTHEAST OF SARANAC
   LAKE NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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 637...WW 638...WW
   639...WW 640...WW 641...
   
   DISCUSSION...THUNDERSTORMS INCREASING IN NUMBER AND INTENSITY OVER
   MUCH OF THE WATCH AREA AS AIR MASS BECOMES MDTLY UNSTABLE.  WITH
   30-40 KT OF SHEAR AND MLCAPES TO 2000 J/KG...SEVERE THUNDERSTORMS
   WITH PRIMARY THREAT OF DAMAGING WINDS WILL INCREASER REMAINDER OF
   AFTERNOON.
   
   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 500. MEAN STORM
   MOTION VECTOR 23030.
   
   
   ...HALES
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