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000 

WWUS20 KWNS 032141

SEL5

SPC WW 032141

TXZ000-040200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 155

NWS STORM PREDICTION CENTER NORMAN OK

440 PM CDT THU APR 3 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST TEXAS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 440 PM UNTIL

900 PM CDT.



TORNADOES...HAIL TO 4 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHEAST OF DRYDEN

TEXAS TO 110 MILES NORTHEAST OF DRYDEN TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU5).



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 153...WW 154...



DISCUSSION...INTENSE SUPERCELL IN TERRELL COUNTY TX CONTINUES EARLY

THIS EVENING.  ENVIRONMENT IS VERY UNSTABLE BUT CAP STRENGTHENS WITH

EWD EXTENT.  HOWEVER...VERY STRONG DEEP LAYER SHEAR WILL CONTINUE TO

SUPPORT SUPERCELLS AND LIKELY VERY LARGE HAIL WITH MID/UPPER JET

OVERSPREADING THE REGION.  AN ISOLATED TORNADO OR TWO IS ALSO

POSSIBLE...ALONG WITH DAMAGING WINDS...WITH ANY PERSISTENT

SUPERCELL.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 27030.





...EVANS

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