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000 

WWUS20 KWNS 091439

SEL7

SPC WW 091439

OKZ000-TXZ000-092100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 177

NWS STORM PREDICTION CENTER NORMAN OK

935 AM CDT WED APR 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST OKLAHOMA

       WESTERN NORTH TEXAS



EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 935 AM UNTIL

400 PM 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 30 MILES NORTHEAST OF

CLINTON OKLAHOMA TO 45 MILES WEST SOUTHWEST OF MINERAL WELLS

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 176...



DISCUSSION...VEERING LOW LEVEL JET WILL ALLOW FOR MOISTURE RETURN

NWD WITH STEEP LAPSE RATES AND MODERATE INSTABILITY CONTRIBUTING TO

A THREAT FOR ELEVATED SEVERE THUNDERSTORMS SPREADING NEWD ACROSS WRN

N TX AND INTO SW OK.  HAIL...SOME LARGE...ARE EXPECTED TO BE THE

MAIN THREAT.



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 21535.





...PETERS/HALES

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