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338 

WWUS20 KWNS 292056

SEL3

SPC WW 292056

TXZ000-CWZ000-300400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 73

NWS STORM PREDICTION CENTER NORMAN OK

355 PM CDT TUE MAR 29 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH-CENTRAL TEXAS

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

1100 PM CDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 120

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

NORTHWEST OF SAN ANTONIO TEXAS TO 35 MILES WEST SOUTHWEST OF

ALICE TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 72...



DISCUSSION...STRONG/SEVERE TSTMS ARE EXPECTED TO DEVELOP...PRIMARILY

IN VICINITY OF A SOUTH-SOUTHEAST ADVANCING COLD FRONT...THROUGH LATE

AFTERNOON/EARLY EVENING ACROSS THE TRANSPECOS REGION/RIO GRANDE

VICINITY AND EVENTUALLY TX HILL COUNTRY. VEERING WIND PROFILES AND

VERY STEEP LAPSE RATES ALOFT/MODERATE INSTABILITY WILL SUPPORT SOME

SUPERCELLS/EVENTUAL LINEAR SEGMENTS CAPABLE OF LARGE HAIL AS WELL AS

ISOLATED DAMAGING WINDS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27025.





...GUYER/HART

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