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000 

WWUS20 KWNS 032251

SEL6

SPC WW 032251

ARZ000-OKZ000-TXZ000-040600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 116

NWS STORM PREDICTION CENTER NORMAN OK

550 PM CDT TUE APR 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       SOUTHEAST OKLAHOMA

       NORTHEAST...CENTRAL AND SOUTH CENTRAL TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 550

PM UNTIL 100 AM CDT.



HAIL TO 3 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHEAST OF DE QUEEN ARKANSAS TO 45 MILES SOUTH SOUTHEAST OF

JUNCTION 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 111...WW 112...WW

113...WW 114...WW 115...



DISCUSSION...TSTMS...INCLUDING A FEW SUSTAINED UPDRAFTS/

SUPERCELLS...EXPECTED TO FORM IN THE NEXT HOUR OR SO ALONG COLD

FRONT FRM CNTRL TX NEWD INTO WRN AR...AND ALONG LEE TROUGH/DRY LINE

IN S CNTRL TX.  STRONGLY UNSTABLE / MODESTLY-SHEARED ENVIRONMENT

SUGGESTS VERY LARGE HAIL...HIGH WIND AND POSSIBLY AN ISOLATED

TORNADO AS CONVERGENCE ALONG THE BOUNDARIES IS BOOSTED BY ARRIVAL OF

STRONGER LOW LEVEL NLY FLOW/COOL SURGE NOW ENTERING N CNTRL TX.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 30015.





...CORFIDI

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