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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 900

NWS STORM PREDICTION CENTER NORMAN OK

325 PM EST THU DEC 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL GEORGIA

       FAR WESTERN NORTH CAROLINA

       FAR NORTHWEST SOUTH CAROLINA

       FAR SOUTHEAST TENNESSEE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 325 PM UNTIL

1100 PM EST.



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 80 STATUTE

MILES EITHER SIDE OF A LINE FROM MACON GEORGIA TO 75 MILES

NORTHEAST OF ROME 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 899...



DISCUSSION...QLCS WITH EMBEDDED SUPERCELLS AND BOWING STRUCTURES

ONGOING OVER CNTRL AL IS EXPECTED TO  MOVE/DEVELOP NEWD ACROSS THE

WATCH AREA THIS AFTERNOON AND EVENING IN ADVANCE OF MIDLEVEL TROUGH

TRANSLATING ACROSS THE TN VALLEY.  LATEST SURFACE ANALYSIS INDICATES

A CONCENTRATED ZONE OF PRESSURE FALLS ACROSS THE SRN APPALACHIANS

WHICH WILL ENHANCE LOW-LEVEL MOISTURE FLUX AND AID IN LOW-LEVEL

CONVERGENCE AND UPLIFT ALONG THE HIGHER TERRAIN.  WIDESPREAD CLOUDS

WILL CONTINUE TO LIMIT THE DEGREE OF INSTABILITY WITH MLCAPE OF LESS

THAN 500 J/KG.  HOWEVER...GIVEN THE STRENGTHENING FORCING FOR ASCENT

AND STRONG LOW- AND DEEP-LAYER SHEAR...A CONTINUED RISK FOR A COUPLE

TORNADOES AND DAMAGING WINDS WILL EXIST WITH TSTMS AS THEY MOVE

ACROSS THE REGION.



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

400. MEAN STORM MOTION VECTOR 22040.





...MEAD

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