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Tornado Watch 90
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WW0090 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 90
   NWS STORM PREDICTION CENTER NORMAN OK
   1250 PM EDT SAT MAR 28 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHEAST GEORGIA
          CENTRAL AND COASTAL SOUTH CAROLINA
          COASTAL WATERS
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL
   800 PM EDT.
   
   TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
   MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHWEST OF
   CHARLESTON SOUTH CAROLINA TO 30 MILES EAST SOUTHEAST OF VALDOSTA
   GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 89...
   
   DISCUSSION...A LARGE CONVECTIVE CLUSTER WITH AN EMBEDDED MCV WILL
   LIKELY PERSIST THROUGH THE AFTERNOON WHILE MOVING NEWD FROM GA INTO
   SC.  INSTABILITY IS NOT PARTICULARLY STRONG E OF THE ONGOING
   STORMS...BUT SOME MOISTENING AND CONTINUED SURFACE HEATING SHOULD
   RESULT IN SUFFICIENT DESTABILIZATION TO MAINTAIN THE CLUSTER.  GIVEN
   THE ORGANIZED BOWING SEGMENTS AND MODERATELY STRONG VERTICAL
   SHEAR...A COUPLE OF TORNADOES WILL BE POSSIBLE IN ADDITION TO
   DAMAGING WINDS.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
   MEAN STORM MOTION VECTOR 24035.
   
   
   ...THOMPSON
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Page last modified: March 29, 2009
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