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784 

WWUS20 KWNS 241850

SEL6

SPC WW 241850

ALZ000-GAZ000-MSZ000-NCZ000-TNZ000-250200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 546

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT FRI JUN 24 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN ALABAMA

       NORTHERN GEORGIA

       NORTHERN AND CENTRAL MISSISSIPPI

       FAR WESTERN NORTH CAROLINA

       SOUTHERN TENNESSEE



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 900

PM 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST

NORTHWEST OF GREENWOOD MISSISSIPPI TO 60 MILES NORTHEAST OF

ATLANTA 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 544...WW 545...



DISCUSSION...MULTIPLE TSTM CLUSTERS HAVE EVOLVED THIS AFTERNOON

AHEAD OF SYNOPTIC COLD FRONT AND WITHIN A MOIST AIR MASS WITH MLCAPE

OF 3000-4000 J/KG.  THE STRONG INSTABILITY AND 30-35 KT OF NWLY FLOW

IN THE MIDLEVELS WILL SUPPORT THE CONTINUED UPSCALE GROWTH OF STORMS

INTO ONE OR MULTIPLE FORWARD-PROPAGATING CONVECTIVE SYSTEMS WITH THE

RISK FOR DAMAGING WINDS AND 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 29030.





...MEAD

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