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| #898750 (Received by flhurricane at: 4:44 AM 18.Aug.2017) TCPAT4 BULLETIN Tropical Storm Harvey Advisory Number 4 NWS National Hurricane Center Miami FL AL092017 500 AM AST Fri Aug 18 2017 ...HARVEY DRENCHING THE WINDWARD ISLANDS... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...13.1N 59.1W ABOUT 30 MI...45 KM ESE OF BARBADOS ABOUT 135 MI...220 KM ESE OF ST. LUCIA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 270 DEGREES AT 18 MPH...30 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Martinique * St. Lucia * Barbados * St. Vincent and the Grenadines A Tropical Storm Watch is in effect for... * Dominica For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 500 AM AST (0900 UTC), the center of Tropical Storm Harvey was located near latitude 13.1 North, longitude 59.1 West. Harvey is moving toward the west near 18 mph (30 km/h), and a continued westward motion with a slight increase in forward speed is expected over the next couple of days. On the forecast track, Harvey should move through the Windward Islands and into the eastern Caribbean Sea later today. Maximum sustained winds remain near 40 mph (65 km/h) with higher gusts. Some slight strengthening is possible during the next 48 hours. Tropical-storm-force winds extend outward up to 60 miles (95 km) mainly to the north of the center. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected to first reach the Lesser Antilles within the warning area later this morning, making outside preparations difficult or dangerous. Tropical storm conditions are possible in the watch area later today. RAINFALL: Harvey is expected to produce rainfall totals of 2 to 4 inches across portions of the Windward Islands from Martinique southward to Grenada. These rains could cause life-threatening flash floods and mudslides. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Avila |
