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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 640

NWS STORM PREDICTION CENTER NORMAN OK

640 PM EDT MON SEP 17 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL GEORGIA

       WESTERN NORTH CAROLINA

       UPSTATE SOUTH CAROLINA

       EASTERN TENNESSEE



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 640 PM UNTIL

300 AM 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 120 MILES NORTH NORTHWEST OF

ATHENS GEORGIA TO 40 MILES SOUTH SOUTHWEST OF MACON 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.



DISCUSSION...SEVERAL SHORT BANDS/SMALL CLUSTERS OF TSTMS EXPECTED TO

PERSIST AND POSSIBLY INCREASE IN COVERAGE THROUGH LATE TNGT OVER

PARTS OF THE SRN APPALACHIANS...PIEDMONT...AND CUMBERLAND PLATEAU AS

MOIST/CONFLUENT FLOW STRENGTHENS DOWNSTREAM FROM SRN STREAM IMPULSE

ACCELERATING NEWD FROM LA. WHILE UPDRAFT INTENSITY WILL BE LIMITED

BY WEAK LOW TO MID-LVL LAPSE RATES...POTENTIAL WILL EXIST FOR

LOW-LVL MESOCYCLONES/POSSIBLE TORNADOES...MAINLY ALONG/NEAR

SLOWLY-ADVANCING WARM FRONT NOW DRAPED ALONG THE SRN FRINGES OF THE

MOUNTAINS.



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

450. MEAN STORM MOTION VECTOR 21030.





...CORFIDI

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