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Potential Tropical Cyclone Nine Public Advisory Number 1A
2020-07-28 19:43:46| National Hurricane Center (Atlantic)
Issued at 200 PM AST Tue Jul 28 2020 000 WTNT34 KNHC 281743 TCPAT4 BULLETIN Potential Tropical Cyclone Nine Intermediate Advisory Number 1A NWS National Hurricane Center Miami FL AL092020 200 PM AST Tue Jul 28 2020 ...AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT BEGINNING TO INVESTIGATE THE DISTURBANCE... ...SYSTEM EXPECTED TO BRING HEAVY RAINFALL AND TROPICAL-STORM-CONDITIONS TO THE LEEWARD ISLANDS... SUMMARY OF 200 PM AST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...14.1N 54.8W ABOUT 510 MI...820 KM ESE OF THE LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Barbados has issued a Tropical Storm Warning for Dominica. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Puerto Rico, Vieques, Culebra * U.S. Virgin Islands * British Virgin Islands * Antigua, Barbuda, Montserrat, St. Kitts, Nevis, and Anguilla * Guadeloupe, Martinique, St. Martin, and St. Barthelemy * Saba and St. Eustatius * St. Maartin * Dominica A Tropical Storm Watch is in effect for... * Dominican Republic from Cabo Engano to the northern border with Haiti Interests elsewhere in the Leeward Islands and Hispaniola should monitor the progress of this system. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area within 48 hours. 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. DISCUSSION AND OUTLOOK ---------------------- At 200 PM AST (1800 UTC), the disturbance was centered near latitude 14.1 North, longitude 54.8 West. The system is moving toward the west near 23 mph (37 km/h), and this general motion with some reduction in forward speed is expected over the next few days. On the forecast track, the system is forecast to move through the Leeward Islands on Wednesday, near or over the Virgin Islands and Puerto Rico Wednesday night, and near or over Hispaniola on Thursday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Some strengthening is expected during the next 48 hours, and the system is forecast to become a tropical storm tonight or Wednesday. Environmental conditions are expected to be conducive for additional development and a tropical storm is forecast to form tonight or Wednesday. An Air Force Reserve reconnaissance aircraft is currently investigating the system. * Formation chance through 48 hours...high...90 percent * Formation chance through 5 days...high ...90 percent Tropical-storm-force winds extend outward up to 230 miles (370 km) primarily to the northeast of the center. The estimated minimum central pressure is 1007 mb (29.74 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Potential Tropical Cyclone Nine can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml. WIND: Tropical storm conditions are expected to reach the Leeward Islands on Wednesday and spread into the U.S. and British Virgin Islands and Puerto Rico Wednesday afternoon through Thursday morning. These conditions could begin reach portions of the north coast of the Dominican Republic early Thursday. RAINFALL: The potential tropical cyclone will produce total rain accumulation of 3 to 6 inches with maximum amounts of 10 inches across the northern Leeward Islands, British and U.S. Virgin Islands and Puerto Rico. Rainfall accumulations of 2 to 4 inches possible across the Windward Islands. This rainfall may produce life threatening flash flooding and mudslides, as well as potential riverine flooding. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Brown
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