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654 

WWUS20 KWNS 131444

SEL2

SPC WW 131444

ARZ000-LAZ000-TXZ000-CWZ000-140000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 902

NWS STORM PREDICTION CENTER NORMAN OK

940 AM CDT SAT SEP 13 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWESTERN ARKANSAS

       WESTERN LOUISIANA

       EASTERN TEXAS

       COASTAL WATERS



EFFECTIVE THIS SATURDAY MORNING AND EVENING FROM 940 AM UNTIL 700

PM 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH OF SHREVEPORT

LOUISIANA TO 45 MILES SOUTH SOUTHEAST OF LAKE CHARLES LOUISIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 900. WATCH NUMBER 900 WILL NOT BE IN EFFECT AFTER

940 AM CDT.



DISCUSSION...TORNADO THREAT WILL REMAIN ENHANCED FOR MUCH OF THE DAY

ACROSS WW TO THE EAST AND JUST NORTH OF HURRICANE IKE SHIFTING NWD

ACROSS ERN TX.  EXTREME LOW LEVEL SHEAR IN PLACE WILL MAINTAIN

FAVORABLE CONDITIONS FOR TORNADOES AS HEATING INCREASES THROUGH THE

DAY...WITH GREATEST THREAT ACROSS FAR ERN TX INTO WRN LA...SPREADING

INTO SWRN AR AND POSSIBLY FAR SERN OK LATER TODAY.  THREAT APPEARS

TO BE DIMINISHING TO THE SOUTH OF IKE AS WLY LOW LEVEL FLOW LIMITS

HELICITY.



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

550. MEAN STORM MOTION VECTOR 19050.





...EVANS

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