

677 

WWUS20 KWNS 181442

SEL1

SPC WW 181442

GAZ000-KYZ000-NCZ000-SCZ000-TNZ000-182200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 461

NWS STORM PREDICTION CENTER NORMAN OK

1040 AM EDT THU JUN 18 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF NORTHERN GEORGIA

       PARTS OF SOUTHERN KENTUCKY

       FAR WESTERN NORTH CAROLINA

       NORTHWESTERN SOUTH CAROLINA

       PARTS OF MIDDLE AND EASTERN TENNESSEE



EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1040 AM UNTIL

600 PM EDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



EXTREMELY DAMAGING THUNDERSTORM WIND GUSTS TO 80 MPH...LARGE HAIL

TO 2 INCHES IN DIAMETER...AND DANGEROUS LIGHTNING ARE POSSIBLE IN

THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

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

BOWLING GREEN KENTUCKY TO 35 MILES SOUTH SOUTHWEST OF ATHENS

GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 459...WW 460...



DISCUSSION...BOW ECHO/DERECHO IS MOVING RAPIDLY SEWD CENTRAL KY

DRIVEN BY A 60-70 KT REAR INFLOW JET.  MORNING SOUNDINGS SWD INTO GA

INDICATE THAT POTENTIALLY A VERY UNSTABLE AIR MASS IS IN PLACE IN

ADVANCE OF THIS SYSTEM AND WITH DAYTIME HEATING...EXPECT THE CURRENT

ASSOCIATED WIND DAMAGE TO BECOME MORE WIDESPREAD AND INTENSE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 33045.





...HALES

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