

357 

WWUS20 KWNS 112044

SEL3

SPC WW 112044

ARZ000-OKZ000-TXZ000-120300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 283

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT WED MAY 11 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       SOUTHEAST OKLAHOMA

       SOUTH CENTRAL THROUGH NORTH CENTRAL TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 345 PM UNTIL

1000 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH

NORTHWEST OF HOT SPRINGS ARKANSAS TO 30 MILES WEST OF AUSTIN

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 278. WATCH NUMBER 278 WILL NOT

BE IN EFFECT AFTER 345 PM CDT. CONTINUE...WW 279...WW 280...WW

281...WW 282...



DISCUSSION...STORMS DEVELOPING FROM SCNTRL THROUGH NERN TX WILL

CONTINUE EWD INTO MODERATELY UNSTABLE ENVIRONMENT ACROSS ERN TX INTO

NWRN LA AND SWRN AR. STORMS ARE EMBEDDED WITHIN 34-45 KT SHEAR

SUPPORTIVE OF ORGANIZED STORM STRUCTURES WITH DAMAGING WIND AND

LARGE HAIL THE MAIN THREATS.



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 24035.





...DIAL

