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Tornado Watch 309
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WW0309 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 309
   NWS STORM PREDICTION CENTER NORMAN OK
   445 PM EDT SUN MAY 11 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN NORTH CAROLINA
          EXTREME NORTHEAST SOUTH CAROLINA
          SOUTHEAST VIRGINIA
          COASTAL WATERS
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 445 PM UNTIL
   1100 PM EDT.
   
   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
   MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF
   ELIZABETH CITY NORTH CAROLINA TO 20 MILES SOUTH OF WILMINGTON
   NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 307...WW 308...
   
   DISCUSSION...SECONDARY CYCLOGENESIS IS UNDERWAY ALONG PIEDMONT FRONT
   AHEAD OF POWERFUL DEEP-LAYER CYCLONE SPINNING ACROSS OH ATTM. AIR
   MASS AHEAD OF THE DEVELOPING LOW HAS BEEN MOISTENING BUT RELATIVELY
   SLOW TO DESTABILIZE DUE TO EXTENSIVE CLOUD COVER NOW DEPARTING PARTS
   OF ERN NC. FORCING WITH THE SECONDARY LOW AND LATER WITH ADVANCING
   COLD FRONT SHOULD BE SUFFICIENT FOR STRONG TO SEVERE STORMS TO
   SPREAD EAST ACROSS PARTS OF THE COASTAL PLAIN/TIDEWATER AND OUTER
   BANKS AREAS THROUGH LATER THIS EVENING. INTENSE DEEP-LAYER
   TROPOSPHERIC WIND FIELDS /100KT AT 500MB/...MAGNITUDE OF LARGE SCALE
   FORCING...AND PRONOUNCED MID LEVEL DRY INTRUSION...SHOULD ALL
   SUPPORT DAMAGING STRAIGHT-LINE WIND POTENTIAL...AS WELL AS BRIEF
   TORNADOES.
   
   AVIATION...TORNADOES AND 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
   500. MEAN STORM MOTION VECTOR 24035.
   
   
   ...CARBIN
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Page last modified: May 11, 2008
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