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WWUS20 KWNS 030439

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LAZ000-MSZ000-031200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 884

NWS STORM PREDICTION CENTER NORMAN OK

1140 PM CDT TUE SEP 2 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN AND SOUTHWESTERN LOUISIANA

       EXTREME SOUTHWESTERN MISSISSIPPI



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1140 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 40 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF NATCHEZ

MISSISSIPPI TO 85 MILES SOUTH SOUTHWEST OF ALEXANDRIA LOUISIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



DISCUSSION...STORMS HAVE INCREASED IN INTENSITY DURING THE PAST HOUR

ALONG A CONVERGENCE BOUNDARY LOCATED IN ERN LA. DESPITE SOME WEAK

DIURNAL COOLING...MUCAPES AROUND 500 J/KG...SURFACE DEWPOINTS IN THE

MID 70S AND 1 KM SHEAR AT 30-40 KT WILL BE FAVORABLE FOR ROTATING

STORMS AND ISOLATED TORNADOES THROUGH THE OVERNIGHT HOURS.



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 22030.





...IMY

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