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WWUS20 KWNS 111810

SEL7

SPC WW 111810

NCZ000-SCZ000-VAZ000-120000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 307

NWS STORM PREDICTION CENTER NORMAN OK

210 PM EDT SUN MAY 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTH CAROLINA

       NORTHERN SOUTH CAROLINA

       SOUTHERN VIRGINIA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 800

PM EDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF

SOUTH HILL VIRGINIA TO 75 MILES SOUTH SOUTHEAST OF CHARLOTTE

NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 306...



DISCUSSION...STRONGLY FORCED PRE-FRONTAL SQUALL LINE HAS PASSED THE

CREST OF THE APPALACHIANS AND WAS RECONSOLIDATING ACROSS THE VA/NC

FOOTHILLS ATTM. AIR MASS AHEAD OF THE BROKEN CONVECTIVE LINE WAS

ONLY WEAKLY UNSTABLE BASED ON OBJECTIVE DATA. HOWEVER...BINOVC AND

MOISTENING ON LOW LEVEL ESELY FLOW WILL CONTRIBUTE TO CONTINUING

DESTABILIZATION AS THE INTENSE FORCING WITH THE UPPER TROUGH AND

100KT 500MB WIND MAX SPREAD EAST. IN ADDITION TO RAPID STORM MOTION

AND WIND DAMAGE THREAT...BRIEF TORNADOES APPEAR POSSIBLE AS STRONG

SECONDARY CYCLOGENESIS COMMENCES ALONG THE PIEDMONT FRONT...AND INTO

SERN VA NEXT FEW HOURS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 24035.





...CARBIN

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