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Severe Thunderstorm Watch 291
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WW0291 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL1
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 291
   NWS STORM PREDICTION CENTER NORMAN OK
   1110 PM EDT FRI MAY 9 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTH CAROLINA
          COASTAL WATERS
   
   EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1110 PM
   UNTIL 400 AM 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 55
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST
   OF GREENSBORO NORTH CAROLINA TO 80 MILES EAST OF NEW BERN NORTH
   CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
   
   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 290...
   
   DISCUSSION...ONGOING THUNDERSTORM DEVELOPMENT APPEARS TO BE TIED TO
   SHORTWAVE TROUGH SKIRTING THE REGION LATE THIS EVENING...WHICH WILL
   SPREAD GENERALLY ESEWD TOWARDS THE NC COAST OVERNIGHT.  THIS WILL
   OCCUR IN ENVIRONMENT CHARACTERIZED BY VERY STEEP LAPSE RATES AND
   STRONG DEEP LAYER SHEAR...ENHANCING THE SUPERCELL AND SUBSEQUENT
   HAIL GROWTH POTENTIAL.  THEREFORE...LARGE HAIL AND ISOLATED DAMAGING
   WINDS WILL ACCOMPANY STRONGER CORES...DESPITE THE MARGINAL
   INSTABILITY AND LIKELY SLIGHTLY-ELEVATED NATURE OF THE STORMS.
   
   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 400. MEAN STORM
   MOTION VECTOR 29035.
   
   
   ...EVANS
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