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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 60

NWS STORM PREDICTION CENTER NORMAN OK

940 PM EDT WED MAR 23 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN GEORGIA

       WESTERN NORTH CAROLINA

       EASTERN TENNESSEE



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 940 PM

UNTIL 200 AM 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 55 MILES NORTHEAST OF HOT

SPRINGS NORTH CAROLINA TO 90 MILES SOUTH SOUTHWEST OF KNOXVILLE

TENNESSEE.  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 56...WW 58...WW 59...



DISCUSSION...BROKEN BAND OF TSTMS INCLUDING LOW-TOPPED SUPERCELLS IS

EXPECTED TO PROGRESS EWD THROUGH THE SRN APPALACHIANS TONIGHT IN

ADVANCE OF MIDLEVEL IMPULSE MOVING THROUGH THE TN VALLEY.  AMBIENT

ENVIRONMENT REMAINS ONLY WEAKLY UNSTABLE OWING TO THE ONSET OF

NOCTURNAL COOLING IN THE BOUNDARY LAYER AND MARGINAL MOISTURE

CONTENT.  HOWEVER...GIVEN THE RELATIVELY STRONG LOW AND DEEP-LAYER

SHEAR AND PRESENCE OF ABOVE-MENTIONED IMPULSE...THE THREAT FOR A

COUPLE OF TORNADOES IN ADDITION TO HAIL AND LOCALLY DAMAGING WIND

GUSTS WILL PERSIST FOR THE NEXT FEW HOURS.



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 350.

MEAN STORM MOTION VECTOR 27040.





...MEAD

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