

000 

WWUS20 KWNS 151210

SEL7

SPC WW 151210

NCZ000-SCZ000-CWZ000-151900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 147

NWS STORM PREDICTION CENTER NORMAN OK

810 AM EDT SUN APR 15 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN NORTH CAROLINA

       EASTERN SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 810 AM UNTIL 300

PM 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES SOUTH SOUTHWEST OF

ORANGEBURG SOUTH CAROLINA TO 55 MILES NORTH OF NEW BERN 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 145...WW 146...



DISCUSSION...BROKEN PRE-FRONTAL BAND OF THUNDERSTORMS WILL CONTINUE

TO SPREAD EWD/NEWD ACROSS SC/NC THROUGH MIDDAY AS A SURFACE LOW

DEEPENS AND MOVES NEWD FROM THE PIEDMONT...AND A COLD FRONT SWEEPS

EWD ACROSS GA/SC.  THOUGH INSTABILITY REMAINS RATHER WEAK IN THE

WARM SECTOR...BOUNDARY LAYER DEWPOINTS IN THE MID-UPPER 60S AND

STRONG VERTICAL SHEAR PROFILES WILL BE FAVORABLE FOR SUPERCELLS AND

AN ASSOCIATED TORNADO THREAT WITHIN THE LARGER CONVECTIVE BAND.

INITIALLY...THE TORNADO THREAT WILL BE FOCUSED IN SC...WITH AN

INCREASING THREAT EXPECTED BY MID-LATE MORNING ACROSS ERN NC.



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 450.

MEAN STORM MOTION VECTOR 24045.





...THOMPSON

