

748 

WWUS20 KWNS 220439

SEL8

SPC WW 220439

GAZ000-KYZ000-OHZ000-TNZ000-VAZ000-WVZ000-221100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 588

NWS STORM PREDICTION CENTER NORMAN OK

1140 PM EST SAT DEC 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EXTREME NORTHWEST GEORGIA

  EASTERN KENTUCKY

  EXTREME SOUTH CENTRAL OHIO

  EASTERN TENNESSEE

  EXTREME WESTERN VIRGINIA

  WEST CENTRAL WEST VIRGINIA



* EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1140 PM

  UNTIL 600 AM EST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH

NORTHEAST OF HUNTINGTON WEST VIRGINIA TO 45 MILES SOUTH SOUTHWEST

OF CHATTANOOGA TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 584...WW 585...WW

586...WW 587...



DISCUSSION...SQUALL LINE WILL MOVE EWD FROM CENTRAL KY/MIDDLE TN TO

WRN WV/ERN KY/ERN TN OVERNIGHT.  THOUGH INSTABILITY WILL BECOME

QUITE MARGINAL WITH EWD EXTENT...STRONG LOW-MIDLEVEL WINDS MAY BE

TRANSPORTED TO THE GROUND WITHIN THE CONVECTIVE LINE.  THE SRN

PORTION OF THE LINE WILL CONTAIN THE DEEPER STORMS...BUT WILL ALSO

MOVE MORE SLOWLY TO THE E FROM NW AL TOWARD NW GA TOWARD THE END OF

THE WATCH.



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 350. MEAN STORM

MOTION VECTOR 25045.





...THOMPSON

