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806 

WWUS20 KWNS 111734

SEL7

SPC WW 111734

TNZ000-120000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 97

NWS STORM PREDICTION CENTER NORMAN OK

1235 PM CDT THU APR 11 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MIDDLE TENNESSEE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL

700 PM CDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH

NORTHWEST OF CROSSVILLE TENNESSEE TO 80 MILES SOUTH OF NASHVILLE

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 95...WW 96...



DISCUSSION...BAND OF THUNDERSTORMS ALONG THE COLD FRONT WILL

GRADUALLY INTENSIFY THIS AFTERNOON AS THE LOW LEVELS DESTABILIZE

INTO MIDDLE TN.  INSTABILITY WILL NOT BE PARTICULARLY STRONG...BUT

VERTICAL SHEAR WILL BE FAVORABLE FOR EMBEDDED BOWS WITH DAMAGING

WINDS...AND PERHAPS CIRCULATIONS IN THE LINE WITH A LOCALLY ENHANCED

RISK FOR DAMAGING WINDS AND AN ISOLATED/BRIEF TORNADO.



AVIATION...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 23040.





...THOMPSON

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