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000 

WWUS20 KWNS 042059

SEL6

SPC WW 042059

NCZ000-VAZ000-WVZ000-050200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 486

NWS STORM PREDICTION CENTER NORMAN OK

500 PM EDT WED JUL 4 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       A SMALL PART OF NORTHERN NORTH CAROLINA

       CENTRAL AND SOUTHERN VIRGINIA

       SOUTHEASTERN WEST VIRGINIA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 500 PM UNTIL

1000 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 NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH

SOUTHWEST OF BLUEFIELD WEST VIRGINIA TO 45 MILES EAST SOUTHEAST

OF CHARLOTTESVILLE 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 482...WW 483...WW

484...WW 485...



DISCUSSION...WIDELY SCTD STORMS/POSSIBLE SUPERCELLS EXPECTED TO

PERSIST/DEVELOP IN MODERATELY SHEARED LOW LVL THERMAL AXIS ON SRN

FRINGE OF DIFFLUENT SHORTWAVE TROUGH.  SUPERCELLULAR NATURE OF

UPDRAFTS MAY LENGTHEN STORM LIFETIMES AND ENHANCE THREAT FOR

HAIL/WIND AND PERHAPS AN ISOLATED TORNADO.



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.





...CORFIDI

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