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WWUS20 KWNS 270020

SEL9

SPC WW 270020

NCZ000-CWZ000-270900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 809

NWS STORM PREDICTION CENTER NORMAN OK

815 PM EDT FRI AUG 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR EASTERN NORTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 815 PM

UNTIL 500 AM EDT.



TORNADOES...HAIL TO 0.5 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 30 STATUTE

MILES EITHER SIDE OF A LINE FROM 40 MILES NORTH NORTHEAST OF CAPE

HATTERAS NORTH CAROLINA TO 15 MILES SOUTHWEST OF WILMINGTON NORTH

CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 808...



DISCUSSION...DISCRETE SHOWERS AND TSTMS WITH LOW LVL ROTATION

EXPECTED TO PERSIST ALONG ARC OF LOW LVL CONFLUENCE NOW LOCATED OVER

THE NC CSTL WATERS ON NRN FRINGE OF CIRCULATION OF HRCN IRENE.  AS

IRENE CONTINUES SLOWLY NWD...THE CONFLUENCE BAND SHOULD GRADUALLY

LIFT NWD...WITH ADDITIONAL WARMING/MOISTENING OF THE BOUNDARY LAYER

OCCURRING IN ITS VICINITY.  THIS MAY ALLOW THE LOW LVL

CIRCULATIONS...AND THEIR ATTENDANT TORNADO THREAT...TO SPREAD

FARTHER W WITH TIME...IMPACTING THE BARRIER ISLANDS FIRST

AND...LATER THIS EVE/EARLY SAT...FAR ERN PORTIONS OF THE NC CSTL

PLN.  GIVEN EXISTING WIND PROFILES...AND THE LIKELIHOOD FOR SOME

STRENGTHENING OF THE LOW LVL WIND FIELD IN WW AREA LATER

TNGT...EXPECT THAT TORNADO RISK WILL INCREASE WITH TIME...ESPECIALLY

OVER FAR ERN AND NERN NC



AVIATION...TORNADOES AND 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 12035.





...CORFIDI

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