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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 847

NWS STORM PREDICTION CENTER NORMAN OK

1015 AM EDT TUE SEP 6 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR EASTERN GEORGIA

       CENTRAL AND EASTERN SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1015 AM UNTIL 800

PM EDT.



TORNADOES...HAIL TO 0.5 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 35 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF

COLUMBIA SOUTH CAROLINA TO 20 MILES EAST SOUTHEAST OF SAVANNAH

GEORGIA.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 845...WW 846...



DISCUSSION...TSTMS SHOULD CONTINUE TO INCREASE IN COVERAGE AND

INTENSITY TODAY WITHIN MOIST LOW-LEVEL FLOW REGIME IN PLACE ACROSS

REGION.  12Z REGIONAL SOUNDINGS INDICATE THAT AIR MASS IS ALREADY

UNCAPPED AND FURTHER DAYTIME HEATING WILL YIELD MLCAPE VALUES

APPROACHING 1500-2500 J/KG.  MOREOVER...AREA WILL REMAIN ALONG ERN

ENVELOPE OF STRONGER FLOW FIELD ATTENDANT TO SRN APPALACHIANS

CYCLONE WITH RESULTANT VERTICAL SHEAR SUPPORTIVE OF ORGANIZED STORM

MODES INCLUDING SUPERCELLS CAPABLE OF DAMAGING WINDS AND A COUPLE OF

TORNADOES.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 21030.





...MEAD

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