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770 

WWUS20 KWNS 051839

SEL5

SPC WW 051839

ARZ000-OKZ000-TXZ000-052300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 245

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CDT TUE MAY 5 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF SOUTHWEST ARKANSAS

       PARTS OF SOUTHEAST OKLAHOMA

       PARTS OF NORTHEAST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

600 PM CDT.



HAIL TO 2.5 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 70

STATUTE MILES EITHER SIDE OF A LINE FROM 30 MILES SOUTH SOUTHWEST

OF TEXARKANA ARKANSAS TO 30 MILES NORTH OF DURANT OKLAHOMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 244...



DISCUSSION...ONGOING MCS SRN OK IS MOVING SEWD INTO INCREASINGLY

MORE FAVORABLE INSTABILITY AS FRONTAL ZONE CONTINUES MOVING NWD THRU

N TX.  ALONG WITH LARGE HAIL...DAMAGING WINDS EXPECTED TO BECOME

INCREASING THREAT AS LEADING EDGE OF MCS/BOW ECHO CONTINUES ESEWD

ACROSS WATCH AREA.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27030.





...HALES

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