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469 

WWUS20 KWNS 111949

SEL9

SPC WW 111949

NCZ000-SCZ000-VAZ000-120000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 379

NWS STORM PREDICTION CENTER NORMAN OK

345 PM EDT THU JUN 11 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL NORTH CAROLINA

       NORTH-CENTRAL SOUTH CAROLINA

       SOUTHWESTERN VIRGINIA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 345 PM UNTIL

800 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHWEST OF GREENSBORO NORTH CAROLINA TO 75 MILES SOUTH OF

CHARLOTTE NORTH CAROLINA.  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 375...WW 376...WW

377...WW 378...



DISCUSSION...ISOLATED STORMS HAVE DEVELOPED THIS AFTERNOON IN

ADVANCE OF BOWING MCS WITH ACTIVITY EXPECTED TO SPREAD EWD ACROSS

THE REGION THIS AFTERNOON INTO EVENING.  INFLOW AIR MASS IS QUITE

MOIST AND MODERATELY UNSTABLE WITH MLCAPE OF 1000-2000 J/KG.  THIS

INSTABILITY IN CONJUNCTION WITH STRENGTHENING DEEP WLY FLOW /PER

UPSTREAM VWPS/ SHOULD MAINTAIN ORGANIZED STORM STRUCTURES WITH THE

THREAT FOR DAMAGING WINDS AND SOME HAIL.



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 27030.





...MEAD/THOMPSON

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