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000 

WWUS20 KWNS 252231

SEL5

SPC WW 252231

TXZ000-260400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 235

NWS STORM PREDICTION CENTER NORMAN OK

530 PM CDT FRI APR 25 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL TEXAS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 530 PM UNTIL

1100 PM CDT.



HAIL TO 2 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 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES SOUTHWEST

OF JUNCTION TEXAS TO 15 MILES SOUTH OF TEMPLE TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 231...WW 232...WW

233...WW 234...



DISCUSSION...THUNDERSTORMS WILL LIKELY DEVELOP ALONG A SURFACE COLD

FRONT AND WEAK PRE-FRONTAL TROUGH ACROSS CENTRAL TX.  LOW-LEVEL FLOW

IS WEAK ACROSS THIS AREA...BUT THE SRN FRINGE OF THE STRONGER MID

LEVEL FLOW AND STRONG INSTABILITY COULD SUPPORT A FEW ORGANIZED

MULTICELL CLUSTERS...AND PERHAPS STORMS WITH MARGINAL SUPERCELL

STRUCTURES.  LARGE HAIL SHOULD BE THE PRIMARY SEVERE THREAT GIVEN

THE STEEP MID LEVEL LAPSE RATES...THOUGH A FEW DAMAGING DOWNBURSTS

MAY ALSO OCCUR AS STORM CONGEAL DURING THE EVENING.



AVIATION...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 32015.





...THOMPSON

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