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673 

WWUS20 KWNS 040642

SEL4

SPC WW 040642

GAZ000-041400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 724

NWS STORM PREDICTION CENTER NORMAN OK

240 AM EDT THU AUG 4 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL GEORGIA



EFFECTIVE THIS THURSDAY MORNING FROM 240 AM UNTIL 1000 AM EDT.



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 65

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

ATLANTA GEORGIA TO 60 MILES SOUTH SOUTHEAST OF ATLANTA GEORGIA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 723...



DISCUSSION...W-E LINE OF TSTMS HAS STRENGTHENED IN THE PAST HALF

HOUR OVER N GA.  AREA VWP DATA SHOW 20-25 KT 925-850 MB WLY FLOW S

OF LINE...WITH SIMILAR NW TO NLY SPEEDS AT 700 AND 500 MB

RESPECTIVELY.  COUPLED WITH COINCIDENT AXIS OF HI PW AND RELATIVELY

STEEP LOW TO MID LVL LAPSE RATES /GIVEN CLEAR SKIES OVER REGION S OF

LINE WED AFTN/...SETUP APPEARS FAVORABLE FOR SWD PROPAGATION OF THE

LINE.  EMBEDDED STORMS COULD YIELD A FEW WET MICROBURSTS.



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 550. MEAN STORM MOTION

VECTOR 36020.





...CORFIDI

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