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028 

WWUS20 KWNS 280922

SEL8

SPC WW 280922

ALZ000-ARZ000-KYZ000-MOZ000-TNZ000-281700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 568

NWS STORM PREDICTION CENTER NORMAN OK

420 AM CDT TUE JUN 28 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN ALABAMA

       NORTHERN ARKANSAS

       A SMALL PART OF SOUTHWEST KENTUCKY

       SOUTHERN MISSOURI

       WESTERN AND MIDDLE TENNESSEE



EFFECTIVE THIS TUESDAY MORNING FROM 420 AM UNTIL NOON CDT.



HAIL TO 1.7 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 35 MILES SOUTH OF

MONETT MISSOURI TO 85 MILES EAST SOUTHEAST OF NASHVILLE

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...TWO EVOLVING TSTM CLUSTERS...ONE IN SW MO AND THE OTHER

IN NRN MIDDLE TN...EXPECTED TO MOVE GENERALLY ESE TO SE THROUGH

LATER THIS MORNING AS ASSOCIATED COLD FRONT SETTLES FARTHER S INTO

REGION OF GREATER SFC-BASED INSTABILITY.  WSWLY LOW LVL INFLOW TO

THE CLUSTERS WILL BE MODEST...BUT WILL TAP PW AOA 2 INCHES.  IN

ADDITION...THE MCSS WILL REMAIN IN AREA OF UPR DIVERGENCE ASSOCIATED

WITH ENTRANCE REGION OF LWR OH VLY JET STREAK.  PRECIP LOADING/STORM

MERGERS MAY YIELD A FEW WET MICROBURSTS...WITH SVR HAIL ALSO A

POSSIBILITY...MAINLY IN MO/AR.



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

TO 1.7 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 29025.





...CORFIDI

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