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ARZ000-MOZ000-OKZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 345

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT SUN JUN 3 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ARKANSAS

       EXTREME SOUTHERN MISSOURI

       EXTREME NORTHEAST OKLAHOMA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 330 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2.5 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 40 MILES SOUTH SOUTHWEST OF

GROVE OKLAHOMA TO 30 MILES EAST NORTHEAST OF BATESVILLE ARKANSAS.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 344...



DISCUSSION...LATEST GUIDANCE HAS SUGGESTED A MORE RAPID ONSET OF

DEEP CONVECTION ACROSS THE WATCH AREA IN THE NEXT 1-2 HOURS.

MAGNITUDE OF INSTABILITY /MLCAPE AROUND 3000 J PER KG/ WILL

CONTRIBUTE TO STOUT UPDRAFTS WHERE 30-40KT EFFECTIVE VERTICAL SHEAR

WILL CONTRIBUTE TO STORM ROTATION AND PERSISTENCE. THIS ENVIRONMENT

WILL CLEARLY SUPPORT VERY LARGE HAIL AND DAMAGING WINDS. TORNADO

POTENTIAL IS A BIT MORE SUBTLE BUT SUBSTANTIAL ENOUGH TO WARRANT A

TORNADO WATCH. THIS POTENTIAL MAY EVOLVE ALONG THE WARM FRONT

SITUATED WEST TO EAST ALONG THE CENTER OF THE WATCH AREA....SOUTH OF

THE MO BORDER. ENHANCED LOW LEVEL SHEAR ALONG AND IMMEDIATELY TO THE

NORTH OF THIS BOUNDARY IS SUFFICIENT TO RESULT IN STRONGER LOW LEVEL

STORM ROTATION AND THE CHANCE OF A TORNADIC SUPERCELL OR TWO INTO

THE EVENING BEFORE STORMS MERGE AND SPREAD EAST ALONG AND SOUTH OF

THE MO/AR BORDER.



AVIATION...TORNADOES AND 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.





...CARBIN

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