WATCHES: Severe Thunderstorm Watch Number 461

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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