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631 

WWUS20 KWNS 272307

SEL7

SPC WW 272307

GAZ000-SCZ000-CWZ000-280400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 777

NWS STORM PREDICTION CENTER NORMAN OK

710 PM EDT TUE OCT 27 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST GEORGIA

       EASTERN SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY NIGHT FROM 710 PM UNTIL MIDNIGHT 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 25 STATUTE

MILES EITHER SIDE OF A LINE FROM 10 MILES WEST OF SAVANNAH

GEORGIA TO 35 MILES NORTHEAST OF CHARLESTON SOUTH CAROLINA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...ISOLATED INTENSE THUNDERSTORMS SOUTHWEST OF SAVANNAH

WILL TRACK EAST-NORTHEASTWARD THROUGH THE EVENING...ALONG AND SOUTH

OF RETREATING SURFACE BOUNDARY.  MOIST AND MARGINALLY UNSTABLE

BOUNDARY LAYER OVER THIS REGION...COUPLED WITH FAVORABLE VERTICAL

SHEAR AND CONVERGENCE NEAR THE BOUNDARY...MAY POSE A RISK FOR

ISOLATED TORNADOES AND 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 450.

MEAN STORM MOTION VECTOR 23030.





...HART

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