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000 

WWUS20 KWNS 032008

SEL9

SPC WW 032008

LAZ000-TXZ000-CWZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 219

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT THU MAY 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN LOUISIANA

       SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

1100 PM CDT.



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 75 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST OF

COLLEGE STATION TEXAS TO 40 MILES EAST OF FORT POLK LOUISIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 217...WW 218...



DISCUSSION...VERY MOIST AND UNSTABLE AIR MASS HAS BEEN IN PLACE THRU

MUCH OF THE AFTERNOON.  MID LEVEL TROUGH AXIS IS NOW MOVING INTO

THIS REGION WITH MORE PROMINENT CONVECTIVE BOUNDARY EXTENDING FROM

ACT - LFK - IER.  STORMS ARE EXPECTED TO CONTINUE TO DEVELOP RAPIDLY

AND INTENSIFY WITH DEEP LAYER SHEAR OF 50 KT AND MLCAPE REACHING

INTO THE 1500-2000 J/KG RANGE.  THIS IS SUFFICIENT TO SUPPORT

SUPERCELLS ALONG AND SOUTH OF THE BOUNDARY DURING THE NEXT SEVERAL

HOURS.



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

450. MEAN STORM MOTION VECTOR 25035.





...MCCARTHY

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