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000 

WWUS20 KWNS 022153

SEL5

SPC WW 022153

ALZ000-GAZ000-SCZ000-030500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 795

NWS STORM PREDICTION CENTER NORMAN OK

450 PM CDT SAT AUG 2 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL ALABAMA

       NORTHERN AND CENTRAL GEORGIA

       UPSTATE SOUTH CAROLINA



EFFECTIVE THIS SATURDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CDT.



HAIL TO 1.5 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 200

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTHWEST OF

ANNISTON ALABAMA TO 65 MILES NORTHEAST OF ROME GEORGIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 791...WW 792...WW

793...WW 794...



DISCUSSION...STRONG TO SVR PULSE STORMS EXPECTED TO PERSIST THROUGH

THE EVENING IN ZONE OF MODEST DEEP CONVERGENCE ASSOCIATED WITH WIND

SHIFT AXIS MOVING S ACROSS REGION IN CONJUNCTION WITH AMPLIFYING

NERN U.S. TROUGH.  DEGREE OF SFC-BASED INSTABILITY/STEEP LOW-LVL

LAPSE RATES ...AND POTENTIAL FOR UPSCALE DEVELOPMENT AS COLD POOLS

MERGE AND SETTLE SWD...SUGGEST SUFFICIENT COVERAGE/DURATION OF

OVERALL SVR THREAT TO WARRANT A WATCH.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 35025.





...CORFIDI

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