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439 

WWUS20 KWNS 291903

SEL6

SPC WW 291903

INZ000-KYZ000-OHZ000-WVZ000-300200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 436

NWS STORM PREDICTION CENTER NORMAN OK

305 PM EDT FRI JUN 29 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST INDIANA

       EXTREME NORTHERN KENTUCKY

       MOST OF CENTRAL AND SOUTHERN OHIO

       CENTRAL AND NORTHWEST WEST VIRGINIA



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

1000 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

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

NORTHWEST OF DAYTON OHIO TO 45 MILES EAST OF PARKERSBURG WEST

VIRGINIA.  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...CONTINUE...WW 435...



DISCUSSION...A DEVELOPING MCS/BOW ECHO ACROSS INDIANA IS EXPECTED TO

MOVE ESEWD THROUGH THE AFTERNOON/EVENING AT ROUGHLY 50 KT.  THE

STORM ENVIRONMENT DOWNSTREAM FEATURES STRONG INSTABILITY AND

SUFFICIENT DEEP-LAYER FLOW/SHEAR TO MAINTAIN AN ORGANIZED MCS...AND

THERE WILL BE THE POTENTIAL FOR WIDESPREAD DAMAGING WINDS /SOME

SIGNIFICANT/ WITH THIS BOWING SYSTEM THROUGH THIS EVENING.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 650. MEAN STORM

MOTION VECTOR 29050.





...THOMPSON

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