

168 

WWUS20 KWNS 052319

SEL8

SPC WW 052319

NCZ000-CWZ000-060500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 578

NWS STORM PREDICTION CENTER NORMAN OK

720 PM EDT THU AUG 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN NORTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 720 PM

UNTIL 100 AM EDT.



HAIL TO 0.5 INCH 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF

ELIZABETH CITY NORTH CAROLINA TO 25 MILES SOUTHWEST OF

JACKSONVILLE NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 575...WW 576...WW 577...



DISCUSSION...BAND OF TSTMS ON LEADING EDGE OF COMPOSITE OUTFLOW

BOUNDARY NOW NEARING I-95 IN CNTRL/ERN NC EXPECTED TO CONTINUE E/ESE

INTO REMAINING ZONE OF STRONGLY HEATED BOUNDARY LAYER OVER THE NC

CSTL PLN.  AREA VWP DATA AND HI PW SUGGEST CONTINUED RISK FOR SMALL

BOWING SEGMENTS WITH LOCALLY DMGG WIND.  THE STORMS SHOULD WEAKEN AS

THEY ENCOUNTER MARITIME AIR NEARER THE CST LATE THIS EVE.



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

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27525.





...CORFIDI

