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000 

WWUS20 KWNS 122013

SEL7

SPC WW 122013

LAZ000-TXZ000-CWZ000-130500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 17

NWS STORM PREDICTION CENTER NORMAN OK

210 PM CST MON FEB 12 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN AND CENTRAL LOUISIANA

       SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

1100 PM CST.



TORNADOES...HAIL TO 2 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 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH OF HOUSTON

TEXAS TO 25 MILES NORTH NORTHEAST OF LAFAYETTE LOUISIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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...CONTINUE...WW 16...



DISCUSSION...TSTMS HAVE BECOME SLIGHTLY MORE DISCRETE IN THE PAST

1-2 HRS ALONG SRN END OF CONVECTIVE BAND OVER E TX/FAR WRN LA.

POTENTIAL FOR DISCRETE OR NEAR-DISCRETE SFC-BASED STORMS SHOULD

CONTINUE TO SLOWLY INCREASE OVER FAR SE TX/SRN LA OVER THROUGH MID

EVENING AS /1/ BOUNDARY LAYER CONTINUES TO MOISTEN AND /2/ REGION IS

GLANCED BY 50 KT MID LEVEL WSWLY SPEED MAX ASSOCIATED WITH NW TX UPR

TROUGH.  GIVEN BACKED LOW LEVEL FLOW INVOF CONVECTIVE BAND AND

INCREASING MOISTURE AVAILABILITY...A THREAT MAY DEVELOP FOR

TORNADOES THROUGH LATE TONIGHT.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

400. MEAN STORM MOTION VECTOR 24030.





...CORFIDI

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