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Severe Thunderstorm Watch 914
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WW0914 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 914
   NWS STORM PREDICTION CENTER NORMAN OK
   1100 AM EDT THU OCT 9 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHEAST FLORIDA
          SOUTHEAST GEORGIA
          SOUTHERN SOUTH CAROLINA
          COASTAL WATERS
   
   EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1100 AM UNTIL
   600 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 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF
   SAVANNAH GEORGIA TO 30 MILES SOUTH SOUTHWEST OF GAINESVILLE
   FLORIDA.  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.
   
   DISCUSSION...ONGOING STRONG/SEVERE STORMS ASSOCIATED WITH THE COLD
   CORE LOW OVER SW GA WILL LIKELY PERSIST THROUGH THE AFTERNOON WHILE
   SPREADING NEWD/EWD.  GIVEN RELATIVELY COOL MID LEVEL
   TEMPERATURES...SURFACE HEATING E OF THE ONGOING STORMS...AND
   BOUNDARY LAYER DEWPOINTS NEAR 70 F...INSTABILITY SHOULD REMAIN
   SUFFICIENT FOR STORMS WITH LARGE HAIL.  DEEP LAYER VERTICAL SHEAR
   WILL BE SUFFICIENT FOR A FEW ORGANIZED STORMS WITH SUPERCELL AND/OR
   BOW CHARACTERISTICS...THOUGH LOW-LEVEL SHEAR WILL BE RELATIVELY
   WEAK.  DAMAGING WINDS WILL BE POSSIBLE WITH THE STRONGEST
   STORMS...AS WELL.
   
   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 450. MEAN STORM
   MOTION VECTOR 24025.
   
   
   ...THOMPSON
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Page last modified: October 09, 2008
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