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WWUS20 KWNS 291844

SEL1

SPC WW 291844

ALZ000-GAZ000-300100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 641

NWS STORM PREDICTION CENTER NORMAN OK

145 PM CDT SUN JUN 29 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LARGE PART OF CENTRAL ALABAMA

       MUCH OF NORTHERN AND CENTRAL GEORGIA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 145 PM UNTIL 800

PM CDT.



HAIL TO 2 INCHES 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 NORTH AND SOUTH OF A LINE FROM 25 MILES WEST

NORTHWEST OF TUSCALOOSA ALABAMA TO 75 MILES EAST NORTHEAST OF

MACON 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 637...WW 638...WW

639...WW 640...



DISCUSSION...MORNING CLOUDS ARE DISSIPATING ACROSS NRN AL/GA AND

ALLOWING THE AIR MASS TO BECOME MDTLY UNSTABLE.  30-40KT OF MID

LEVEL WESTERLIES COMBINED WITH FRONTAL CONVERGENCE NOW MOVING SEWD

INTO AREA...WILL SUPPORT STRONG/SEVERE THUNDERSTORM DEVELOPMENT.

PRIMARY THREAT WILL  BE DAMAGING WINDS GIVEN THE UNIDIRECTIONAL

SHEAR AND HIGH PRECIPITABLE WATER.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27030.





...HALES

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