

861 

WWUS20 KWNS 040244

SEL0

SPC WW 040244

ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-041200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 830

NWS STORM PREDICTION CENTER NORMAN OK

945 PM CDT SAT SEP 3 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME SOUTHERN ALABAMA

       THE WESTERN FLORIDA PANHANDLE

       SOUTH CENTRAL AND SOUTHEAST LOUISIANA

       SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 945 PM

UNTIL 700 AM CDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF BATON

ROUGE LOUISIANA TO 35 MILES EAST OF PENSACOLA FLORIDA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 828. WATCH NUMBER 828 WILL NOT BE IN EFFECT AFTER

945 PM CDT. CONTINUE...WW 829...



DISCUSSION...TS LEE IS LOCATED NEAR THE S CENTRAL LA COAST AND IS

EXPECTED TO MOVE LITTLE THE NEXT SEVERAL HOURS.  DISCRETE CELLS WILL

CONTINUE TO FORM ON THE NOSE OF THE MIDLEVEL DRY SLOT ACROSS THE LA

DELTA EWD TO THE AL COAST...WHERE LOW-LEVEL MOISTURE/BUOYANCY/SHEAR

ARE STRONGEST.  THE TORNADO RISK WILL PERSIST WITH STORMS CROSSING

THE COAST THROUGH THE OVERNIGHT HOURS.  THE TORNADO RISK IS A LITTLE

LESS FARTHER INLAND ACROSS SRN MS...AND CLOSER TO THE CENTER IN S

CENTRAL LA...BUT LOW-TOPPED SUPERCELL DEVELOPMENT CANNOT BE RULED

OUT IN THESE AREAS A LITTLE LATER TONIGHT.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 18030.





...THOMPSON

