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000 

WWUS20 KWNS 120727

SEL0

SPC WW 120727

NCZ000-SCZ000-VAZ000-CWZ000-121500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 130

NWS STORM PREDICTION CENTER NORMAN OK

325 AM EDT THU APR 12 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN NORTH CAROLINA

       NORTHEAST SOUTH CAROLINA

       SOUTHEASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING FROM 325 AM UNTIL 1100 AM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHEAST OF FLORENCE

SOUTH CAROLINA TO 20 MILES NORTH NORTHEAST OF NORFOLK VIRGINIA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THIS TORNADO WATCH REPLACES SEVERE

THUNDERSTORM WATCH NUMBER 129. WATCH NUMBER 129 WILL NOT BE IN

EFFECT AFTER 325 AM EDT. CONTINUE...WW 128...



DISCUSSION...SUSTAINED TSTMS/MARGINAL SUPERCELLS CONTINUE TO FORM IN

BROKEN BAND EXTENDING SW/NE ACROSS ERN PORTIONS OF THE SC/NC

PIEDMONT.  THIS BAND SHOULD CONTINUE E ACROSS THE CSTL PLN LATER

THIS MORNING...WHERE STORMS WILL ENCOUNTER A SLOWLY WARMING AND

MOISTENING BOUNDARY LAYER.  WITH SFC LOW CENTER FORMING IN E CNTRL

VA...BACKED LOW LEVEL WINDS IN WW AREA WILL REMAIN SUPPORTIVE OF LOW

LEVEL STORM ROTATION...WHILE 60+ KT WSWLY FLOW ROUNDING BASE OF DEEP

IL UPR LOW PROVIDES SUFFICIENT DEEP SHEAR FOR SUSTAINED UPDRAFTS/

SUPERCELLS.  MAIN SEVERE THREAT WILL BE ISOLATED TORNADOES FROM

SUSTAINED SEMI-DISCRETE STORMS AND/OR SPIN UP TORNADOES INVOF LEWPS.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.

MEAN STORM MOTION VECTOR 25045.





...CORFIDI

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