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WWUS20 KWNS 231834

SEL3

SPC WW 231834

ARZ000-MOZ000-TNZ000-240200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 343

NWS STORM PREDICTION CENTER NORMAN OK

135 PM CDT MON MAY 23 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN ARKANSAS

       MISSOURI BOOTHEEL

       WESTERN TENNESSEE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 900

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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH OF

RUSSELLVILLE ARKANSAS TO 50 MILES NORTH NORTHEAST OF MEMPHIS

TENNESSEE.  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...CONTINUE...WW 338...WW 339...WW

340...WW 341...WW 342...



DISCUSSION...SRN EDGE OF NOCTURNAL MO MCS HAS RECENTLY

RE-INTENSIFIED AND IS NOW BEGINNING TO FORWARD-PROPAGATE ESEWD

ACROSS NRN AR.  GIVEN THE MOIST AND MODERATELY UNSTABLE AIR MASS IN

PLACE DOWNSTREAM ACROSS CNTRL/ERN AR INTO WRN TN...EXPECT THIS

EVOLVING BOW ECHO TO PERSIST AND PERHAPS ACCELERATE WITH A THREAT

FOR DAMAGING WINDS AND HAIL.  ANY TORNADO THREAT SHOULD REMAIN BRIEF

AND CONFINED TO THE IMMEDIATE GUST FRONT OF MCS.



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 28035.





...MEAD

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