000
WTNT33 KNHC 192030
TCPAT3
BULLETIN
HURRICANE BILL ADVISORY NUMBER 18
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL032009
500 PM AST WED AUG 19 2009
...BILL REMAINS AN EXTREMELY DANGEROUS CATEGORY 4 HURRICANE...NOW MOVING NORTHWESTWARD...
INTERESTS IN THE NORTHERN LEEWARD ISLANDS AND BERMUDA 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 PM AST...2100 UTC...THE CENTER OF HURRICANE BILL WAS LOCATED NEAR LATITUDE 19.8 NORTH...LONGITUDE 57.6 WEST OR ABOUT 335 MILES... 535 KM...NORTHEAST OF THE LEEWARD ISLANDS AND ABOUT 970 MILES...1565 KM...SOUTH-SOUTHEAST OF BERMUDA.
BILL IS MOVING TOWARD THE NORTHWEST NEAR 20 MPH...32 KM/HR...AND THIS GENERAL MOTION IS EXPECTED FOR THE NEXT DAY OR SO WITH A TURN TOWARD THE NORTH-NORTHWEST FORECAST BY LATE FRIDAY.
MAXIMUM SUSTAINED WINDS ARE NEAR 135 MPH...215 KM/HR...WITH HIGHER GUSTS. BILL IS A CATEGORY FOUR HURRICANE ON THE SAFFIR-SIMPSON SCALE. SOME ADDITIONAL STRENGTHENING IS POSSIBLE DURING THE NEXT COUPLE OF DAYS.
BILL IS A LARGE TROPICAL CYCLONE. HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 85 MILES...140 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 230 MILES...370 KM.
THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT WAS 947 MB...27.96 INCHES.
LARGE SWELLS ASSOCIATED WITH BILL WILL BE IMPACTING THE ISLANDS OF THE NORTHEAST CARIBBEAN SEA DURING THE NEXT DAY OR TWO. LARGE SWELLS ASSOCIATED WITH BILL SHOULD ALSO BEGIN TO AFFECT BERMUDA AND PORTIONS OF THE EASTERN COAST OF THE UNITED STATES FRIDAY AND SATURDAY.
...SUMMARY OF 500 PM AST INFORMATION...
LOCATION...19.8N 57.6W
MAXIMUM SUSTAINED WINDS...135 MPH
PRESENT MOVEMENT...NORTHWEST OR 305 DEGREES AT 20 MPH
MINIMUM CENTRAL PRESSURE...947 MB
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 1100 PM AST.
$$
FORECASTER BLAKE
