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000 

WWUS20 KWNS 180158

SEL6

SPC WW 180158

OKZ000-TXZ000-180900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 206

NWS STORM PREDICTION CENTER NORMAN OK

900 PM CDT THU APR 17 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST OKLAHOMA

       CENTRAL AND EAST TEXAS



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 900 PM

UNTIL 400 AM CDT.



HAIL TO 1.5 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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF

TEMPLE TEXAS TO 40 MILES NORTHEAST OF PARIS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 204...WW 205...



DISCUSSION...TSTMS EXPECTED TO CONTINUE ALONG SE-MOVING COLD FRONT

OVER CNTRL TX THROUGH EARLY FRIDAY...AIDED BY INCREASING UPR

DIFFLUENCE/UVV AHEAD OF W TX UPR TROUGH...AND NOCTURNAL

STRENGTHENING OF SLY LLJ.  WARM SECTOR CAP SUGGESTS THAT STORMS

SHOULD BE CONFINED TO FRONT...WITH POTENTIAL FOR HIGH WIND IN

ADDITION TO SVR HAIL FROM QUASI-LINEAR LINE SEGMENTS.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 26035.





...CORFIDI

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