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WWUS20 KWNS 032044

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SPC WW 032044

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 341

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT SUN JUN 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF WEST CENTRAL TEXAS



EFFECTIVE THIS SUNDAY AFTERNOON FROM 345 PM UNTIL MIDNIGHT CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST OF SAN

ANGELO TEXAS TO 50 MILES SOUTH OF BROWNWOOD 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...CONTINUE...WW 337...WW 338...WW

339...WW 340...



DISCUSSION...TCU/CBS ARE BEGINNING TO SPROUT ALONG AN OUTFLOW

BOUNDARY THAT EXTENDS ROUGHLY KMAF SEWD TO JUST S OF KBWD.  TSTMS

SHOULD EXPAND SEWD FROM ONGOING SUPERCELLS VCNTY KMAF SEWD ALONG

THIS BOUNDARY THROUGH THE EVENING.  STRENGTHENING COLD POOLS AND

NWLY FLOW AOA 35 KTS COMBINED WITH NEAR 2500 J/KG MLCAPE DOWNSTREAM

SUGGEST POTENTIAL FOR AN EVOLUTION INTO A BOW ECHO TYPE MCS WITH

DAMAGING WINDS LIKELY.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 30045.





...RACY/THOMPSON

