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Severe Thunderstorm Watch 723
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WW0723 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate 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.
   SEL3
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 723...CORRECTED
   NWS STORM PREDICTION CENTER NORMAN OK
   705 PM EDT THU AUG 20 2009
   
   CORRECTED FOR ENDING TIME
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          FAR WESTERN MARYLAND
          WESTERN NEW YORK
          WESTERN PENNSYLVANIA
          NORTHERN WEST VIRGINIA
          LAKE ERIE
          LAKE ONTARIO
   
   EFFECTIVE THIS THURSDAY NIGHT FROM 705 PM UNTIL MIDNIGHT 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 55
   STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTH
   SOUTHEAST OF MORGANTOWN WEST VIRGINIA TO 45 MILES NORTH NORTHWEST
   OF ROCHESTER NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
   THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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 721...WW 722...
   
   DISCUSSION...ERN OH QLCS EXPECTED TO CONTINUE ENE INTO WRN
   PA/NY...WHERE DEEP SHEAR SHOULD REMAIN SUFFICIENT FOR EMBEDDED
   SUSTAINED STORMS/LEWPS AND SMALL SCALE BOWS WITH DMGG WIND.  AHEAD
   OF LINE...WEAKLY CONFLUENT LOW LVL SWLY FLOW MAY CONTINUE TO SUPPORT
   DEVELOPMENT OF ISOLD STORMS THAT...GIVEN ENVIRONMENTAL SHEAR AND
   MOISTURE...COULD EVOLVE INTO SMALL SUPERCELLS POSING A THREAT FOR
   LOCALLY DMGG WIND...MARGINALLY SVR HAIL...AND POSSIBLY AN ISOLD
   TORNADO.
   
   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 23030.
   
   
   ...CORFIDI
   
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Page last modified: August 21, 2009
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