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000 

WWUS20 KWNS 092152

SEL6

SPC WW 092152

LAZ000-MSZ000-TXZ000-CWZ000-100500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 946

NWS STORM PREDICTION CENTER NORMAN OK

350 PM CST TUE DEC 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST AND CENTRAL LOUISIANA

       CENTRAL MISSISSIPPI

       EXTREME SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

1100 PM CST.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES EAST NORTHEAST OF

GREENWOOD MISSISSIPPI TO 35 MILES WEST SOUTHWEST OF INTRACOASTAL

CITY LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 945. WATCH NUMBER 945 WILL NOT BE IN EFFECT AFTER

350 PM CST.



DISCUSSION...THE THREAT FOR SUPERCELLS/TORNADOES WILL PERSIST

THROUGH THE EVENING WITHIN A VERY MOIST AND MODERATELY UNSTABLE WARM

SECTOR ACROSS CENTRAL/SRN LA INTO MS.  THE APPROACH OF A PRONOUNCED

MID LEVEL TROUGH FROM SW TX WILL CONTRIBUTE TO A FAVORABLE

ENVIRONMENT FOR ADDITIONAL THUNDERSTORM DEVELOPMENT INTO EARLY

TONIGHT ACROSS SW/SRN LA...WHILE THE ONGOING PRE-FRONTAL BAND OF

STORMS FROM CENTRAL LA INTO WRN MS SHOULD ALSO PERSIST.  A VERY

MOIST BOUNDARY LAYER AND STRONG LOW-LEVEL SHEAR WILL SUPPORT A

THREAT FOR OCCASIONAL TORNADOES...ALONG WITH DAMAGING WINDS AND

ISOLATED LARGE HAIL.



AVIATION...TORNADOES AND 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 22040.





...THOMPSON

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