Hurricane Bill

Public Advisory 12

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789
WTNT33 KNHC 180834
TCPAT3
BULLETIN
HURRICANE BILL ADVISORY NUMBER 12
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL032009
500 AM AST TUE AUG 18 2009

...BILL MOVING WEST-NORTHWESTWARD ACROSS THE TROPICAL ATLANTIC WITH
LITTLE CHANGE IN STRENGTH...

INTERESTS IN THE LEEWARD ISLANDS SHOULD MONITOR THE PROGRESS OF
BILL.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED
STATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE
MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE
FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA
OUTSIDE OF THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED
BY YOUR NATIONAL METEOROLOGICAL SERVICE.

AT 500 AM AST...0900 UTC...THE CENTER OF HURRICANE BILL WAS LOCATED
NEAR LATITUDE 15.5 NORTH...LONGITUDE 49.7 WEST OR ABOUT 810 MILES...
1305 KM...EAST OF THE LEEWARD ISLANDS.

BILL IS MOVING TOWARD THE WEST-NORTHWEST NEAR 17 MPH...28 KM/HR...
AND THIS MOTION IS EXPECTED TO CONTINUE FOR THE NEXT DAY OR TWO WITH
A GRADUAL TURN TO THE NORTHWEST ON WEDNESDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 100 MPH...160 KM/HR...WITH HIGHER
GUSTS. BILL IS A CATEGORY TWO HURRICANE ON THE SAFFIR-SIMPSON
SCALE. STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS...AND
BILL COULD BECOME A MAJOR HURRICANE WITHIN THE NEXT DAY OR SO.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 30 MILES...45 KM...FROM
THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 150
MILES...240 KM.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 967 MB...28.56 INCHES.

...SUMMARY OF 500 AM AST INFORMATION...
LOCATION...15.5N 49.7W
MAXIMUM SUSTAINED WINDS...100 MPH
PRESENT MOVEMENT...WEST-NORTHWEST OR 285 DEGREES AT 17 MPH
MINIMUM CENTRAL PRESSURE...967 MB

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
1100 AM AST.

$$
FORECASTER BEVEN