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HURRICANE DENNIS ADVISORY NUMBER  21
NATIONAL WEATHER SERVICE MIAMI FL
11 PM EDT SAT AUG 28 1999

AT 11 PM EDT...0300Z...A HURRICANE WATCH IS ISSUED FROM NORTH OF
SAVANNAH GEORGIA TO SURF CITY NORTH CAROLINA. A PORTION OF THE
WATCH AREA WILL LIKELY BE UPGRADED TO A TROPICAL STORM OR HURRICANE
WARNING SUNDAY MORNING.
 
A TROPICAL STORM WARNING REMAINS IN EFFECT FOR THE EAST COAST OF
FLORIDA FROM SEBASTIAN INLET TO FLAGLER BEACH.
 
AT 11 PM EDT...0300Z...THE HURRICANE WATCH IS DISCONTINUED FOR THE
EAST COAST OF FLORIDA FROM SEBASTIAN INLET NORTHWARD TO FERNANDINA
BEACH.
 
IT MAY BE NECESSARY TO SHIFT THE WATCHES AND WARNINGS NORTHWARD AS
DENNIS MOVES ON A TRACK PARALLEL TO THE UNITED STATES SOUTHEAST
COAST.  COASTAL INTERESTS IN GEORGIA...SOUTH AND NORTH CAROLINA
SHOULD CONTINUE TO CLOSELY MONITOR THE PROGRESS OF DENNIS.
 
RESIDENTS IN THE ABACOS AND GRAND BAHAMAS SHOULD REMAIN VIGILANT
UNTIL WINDS AND SEAS SUBSIDE.
 
AT 11 PM EDT...0300Z...THE CENTER OF HURRICANE DENNIS WAS LOCATED
NEAR LATITUDE 28.6 NORTH...LONGITUDE  77.8 WEST OR ABOUT 325 MILES
SOUTH-SOUTHEAST OF CHARLESTON SOUTH CAROLINA...AND 390 MILES SOUTH
OF WILMINGTON NORTH CAROLINA.

DENNIS IS MOVING TOWARD THE NORTH-NORTHWEST NEAR  7 MPH...AND THIS
MOTION IS EXPECTED TO CONTINUE TONIGHT WITH A GRADUAL TURN TO THE
NORTH ON SUNDAY.
 
MAXIMUM SUSTAINED WINDS REMAIN NEAR 105 MPH...WITH HIGHER GUSTS. 
SOME STRENGTHENING IS POSSIBLE DURING THE NEXT 24 HOURS.
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  60 MILES FROM THE
CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 
160 MILES.

THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE RESERVE
HURRICANE HUNTER AIRCRAFT WAS 969 MB...28.61 INCHES.

LARGE SWELLS PROPAGATING WELL AHEAD OF THE HURRICANE HAVE BEGUN TO
REACH PORTIONS OF THE U.S. SOUTHEAST COAST...GENERATING LOCALLY
ROUGH AND DANGEROUS SURF.  SEE STATEMENTS FROM LOCAL NATIONAL
WEATHER SERVICE OFFICES.
 
REPEATING THE 11 PM EDT POSITION...28.6 N... 77.8 W.  MOVEMENT
TOWARD...NORTH-NORTHWEST NEAR  7 MPH.  MAXIMUM SUSTAINED WINDS...
105 MPH.  MINIMUM CENTRAL PRESSURE... 969 MB.
 
AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE
CENTER AT 2 AM EDT FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 5 AM
EDT...SUNDAY.
 
GUINEY
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT5 AND WMO HEADER WTNT75 KNHC.

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