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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 469

NWS STORM PREDICTION CENTER NORMAN OK

1140 AM EDT THU JUL 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN KENTUCKY

       NORTHWEST NORTH CAROLINA

       EXTREME SOUTH CENTRAL OHIO

       NORTHEAST TENNESSEE

       WESTERN VIRGINIA

       CENTRAL AND SOUTHERN WEST VIRGINIA



EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1140 AM UNTIL

700 PM EDT.



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 95

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH

NORTHWEST OF CHARLESTON WEST VIRGINIA TO 10 MILES SOUTH OF

BRISTOL 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.



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN BOTH COVERAGE

AND INTENSITY THIS AFTERNOON ALONG A SWD-MOVING OUTFLOW BOUNDARY IN

CENTRAL WV...AND IN ADVANCE OF A SMALL MCV OVER SE WV.  STRONG

SURFACE HEATING/DESTABILIZATION IS UNDERWAY IN ADVANCE OF THESE

STORMS...AND THE ENVIRONMENT WILL BECOME FAVORABLE FOR DAMAGING

WINDS AS THE STORMS SPREAD SWD /AND LATER MORE TO THE SW/ THROUGH

THE AFTERNOON.  STRONG INSTABILITY WILL ALSO SUPPORT A RISK FOR AT

LEAST ISOLATED LARGE HAIL WITH THE STRONGEST UPDRAFTS.



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 550. MEAN STORM

MOTION VECTOR 36025.





...THOMPSON

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