

559 

WWUS20 KWNS 180058

SEL9

SPC WW 180058

TNZ000-180600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 569

NWS STORM PREDICTION CENTER NORMAN OK

700 PM CST SUN NOV 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  MIDDLE AND EASTERN TENNESSEE



* EFFECTIVE THIS SUNDAY NIGHT FROM 700 PM UNTIL MIDNIGHT CST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHEAST OF CROSSVILLE TENNESSEE TO 65 MILES SOUTHWEST OF

CROSSVILLE TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 562...WW 563...WW

565...WW 566...WW 567...WW 568...



DISCUSSION...A LINE OF STORMS ALONG THE COLD FRONT WILL CONTINUE TO

MOVE SEWD ACROSS TN EARLY TONIGHT...WHILE THE MAIN SYNOPTIC STORM

SYSTEM PASSES BY FARTHER TO THE N.  IN THE SHORT TERM...STRONG

LOW-LEVEL WINDS/SHEAR WILL SUPPORT A RISK FOR DAMAGING

WINDS...THOUGH WEAKENING OF BOTH SHEAR AND INSTABILITY LATER TONIGHT

WILL LEAD TO A DIMINISHING THREAT TOWARD ABOUT 06Z.



AVIATION...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 28040.





...THOMPSON

