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723 

WWUS20 KWNS 270121

SEL6

SPC WW 270121

GAZ000-SCZ000-270900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 66

NWS STORM PREDICTION CENTER NORMAN OK

920 PM EDT SAT MAR 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN GEORGIA

       WESTERN SOUTH CAROLINA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 920 PM

UNTIL 500 AM EDT.



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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTH

NORTHWEST OF ATLANTA GEORGIA TO 35 MILES EAST OF AUGUSTA GEORGIA.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 63...WW 64...WW 65...



DISCUSSION...ELEVATED TSTMS /INCLUDING SUPERCELLS/ WILL CONTINUE TO

MOVE/DEVELOP EWD ACROSS WW AREA TONIGHT WITHIN STRENGTHENING WARM

THERMAL AND MOISTURE ADVECTION REGIME DEVELOPING N OF SURFACE WARM

FRONT.  GIVEN 40-50+ KT OF EFFECTIVE BULK SHEAR...STEEP MIDLEVEL

LAPSE RATES AND MUCAPE OF 1500 J/KG...SETUP WILL FAVOR THE

DEVELOPMENT OF STRONG/ROTATING UPDRAFTS CAPABLE OF LARGE HAIL.



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 27035.





...MEAD

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