WATCHES: Tornado Watch Number 130

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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