

586 

WWUS20 KWNS 130304

SEL6

SPC WW 130304

ARZ000-MOZ000-OKZ000-131000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 296

NWS STORM PREDICTION CENTER NORMAN OK

1005 PM CDT THU MAY 12 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL ARKANSAS

       SOUTH CENTRAL MISSOURI

       EASTERN OKLAHOMA



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1005 PM

UNTIL 500 AM CDT.



HAIL TO 1.5 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTHEAST

OF BATESVILLE ARKANSAS TO 30 MILES WEST SOUTHWEST OF POTEAU

OKLAHOMA.  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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 293. WATCH NUMBER 293 WILL NOT

BE IN EFFECT AFTER 1005 PM CDT. CONTINUE...WW 294...WW 295...



DISCUSSION...SCTD SMALL CLUSTERS/SHORT LINES OF TSTMS EXPECTED TO

PERSIST THROUGH EARLY FRI ALONG MOISTURE/INSTABILITY AXIS ACROSS THE

OZARKS AS LARGE SCALE ASCENT INCREASES DOWNSTREAM FROM VORT LOBE

ROTATING AROUND BASE OF KS UPR LOW.  COUPLED WITH MODERATE

INSTABILITY AND MODEST DEEP SHEAR...SETUP MAY CONTINUE TO YIELD A

FEW SPOTS OF SVR HAIL/WIND.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 24030.





...CORFIDI

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