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000 

WWUS20 KWNS 100308

SEL1

SPC WW 100308

NCZ000-CWZ000-100800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 291

NWS STORM PREDICTION CENTER NORMAN OK

1110 PM EDT FRI MAY 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1110 PM

UNTIL 400 AM EDT.



HAIL TO 2 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST

OF GREENSBORO NORTH CAROLINA TO 80 MILES EAST OF NEW BERN NORTH

CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 290...



DISCUSSION...ONGOING THUNDERSTORM DEVELOPMENT APPEARS TO BE TIED TO

SHORTWAVE TROUGH SKIRTING THE REGION LATE THIS EVENING...WHICH WILL

SPREAD GENERALLY ESEWD TOWARDS THE NC COAST OVERNIGHT.  THIS WILL

OCCUR IN ENVIRONMENT CHARACTERIZED BY VERY STEEP LAPSE RATES AND

STRONG DEEP LAYER SHEAR...ENHANCING THE SUPERCELL AND SUBSEQUENT

HAIL GROWTH POTENTIAL.  THEREFORE...LARGE HAIL AND ISOLATED DAMAGING

WINDS WILL ACCOMPANY STRONGER CORES...DESPITE THE MARGINAL

INSTABILITY AND LIKELY SLIGHTLY-ELEVATED NATURE OF THE STORMS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM

MOTION VECTOR 29035.





...EVANS

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