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000 

WWUS20 KWNS 030347

SEL6

SPC WW 030347

TXZ000-CWZ000-031100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 216

NWS STORM PREDICTION CENTER NORMAN OK

1045 PM CDT WED MAY 2 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH TEXAS

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1045 PM

UNTIL 600 AM 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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHWEST OF

PALACIOS TEXAS TO 105 MILES SOUTH SOUTHWEST OF ALICE TEXAS.  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...CONTINUE...WW 212...WW 214...WW 215...



DISCUSSION...SEMI-DISCRETE STORMS/SUPERCELLS EXPECTED TO PERSIST

THROUGH EARLY THURSDAY ALONG AND AHEAD OF COMPOSITE OUTFLOW BOUNDARY

MOVING SEWD FROM PREVIOUS STORMS.  REGION WILL BE GLANCED BY 40+ KT

WLY MID LEVEL JET ROUNDING BASE OF NEG TILT W TX TROUGH.  COUPLED

WITH VERY RICH MOISTURE AVAILABILITY AND BACKED LOW LEVEL

FLOW...CONVERGENCE MAY PROVE SUFFICIENT TO POSE A CONTINUING THREAT

FOR LARGE HAIL/HIGH WIND AND POSSIBLE TORNADOES.



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

550. MEAN STORM MOTION VECTOR 26035.





...CORFIDI

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