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000 

WWUS20 KWNS 300746

SEL1

SPC WW 300746

TXZ000-301300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 201

NWS STORM PREDICTION CENTER NORMAN OK

245 AM CDT MON APR 30 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       THE BIG BEND REGION AND THE HILL COUNTRY OF TEXAS



EFFECTIVE THIS MONDAY MORNING FROM 245 AM UNTIL 800 AM 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES EAST

NORTHEAST OF JUNCTION TEXAS TO 65 MILES SOUTH SOUTHEAST OF DEL

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 200. WATCH NUMBER 200 WILL NOT BE IN EFFECT

AFTER 245 AM CDT.



DISCUSSION...SRN EXTENT OF BROADER CENTRAL TX MCS WILL LIKELY

MAINTAIN THREATS OF LARGE HAIL AND ISOLATED DAMAGING WINDS OVERNIGHT

ACROSS WW.  AREA WILL REMAIN WITHIN FAVORABLE SHEAR AND MODERATE

INSTABILITY FOR ORGANIZED STORMS.  IN ADDITION...PERSISTENT LLJ AND

FEED OF ABUNDANT MOISTURE WILL ALSO MAINTAIN A THREAT OF HEAVY

RAINFALL.



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 500. MEAN STORM

MOTION VECTOR 24035.





...EVANS

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