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WWUS20 KWNS 080337

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ARZ000-MOZ000-TNZ000-080900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 609

NWS STORM PREDICTION CENTER NORMAN OK

1035 PM CDT THU JUL 7 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST ARKANSAS

       MISSOURI BOOTHEEL

       WESTERN TENNESSEE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1035 PM

UNTIL 400 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 50

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

SOUTHWEST OF JONESBORO ARKANSAS TO 10 MILES NORTH OF JACKSON

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 608...



DISCUSSION...A SMALL BOWING CONVECTIVE SYSTEM HAS RECENTLY EVOLVED

AHEAD OF SHORT WAVE TROUGH TRANSLATING SEWD INTO THE LOWER OH

VALLEY.  A SWLY 20-30+ KT LLJ HAS DEVELOPED IN RESPONSE TO THE

MIDLEVEL SYSTEM WHICH WILL ENHANCE THE INFLUX OF A VERY MOIST AND

UNSTABLE AIR MASS INTO MCS.  DAMAGING WINDS WILL BE THE PRIMARY

HAZARD AS CONVECTIVE SYSTEM PROGRESSES SEWD.



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 30030.





...MEAD

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