

000 

WWUS20 KWNS 092238

SEL0

SPC WW 092238

OKZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 180

NWS STORM PREDICTION CENTER NORMAN OK

540 PM CDT WED APR 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN OKLAHOMA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 540 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2 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 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF

MCALESTER OKLAHOMA TO 50 MILES NORTH OF POTEAU OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 178...WW 179...



DISCUSSION...CLUSTER OF INTENSIFYING THUNDERSTORMS OVER CENTRAL OK

WILL TRACK EASTWARD OVER THE NEXT FEW HOURS...ALONG AND SOUTH OF

SURFACE WARM FRONT.  INCREASINGLY MOIST AND UNSTABLE AIR

MASS...COUPLED WITH STRONG DYNAMIC FORCING...WILL POSE A THREAT OF

SEVERE STORMS.  DAMAGING WINDS AND HAIL ARE THE INITIAL THREAT...BUT

AN ISOLATED TORNADOES COULD ALSO OCCUR AS WIND FIELDS STRENGTHEN

THIS EVENING.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 25035.





...HART

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