WATCHES: Tornado Watch Number 809

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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