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| #1013235 (Received by flhurricane at: 1:59 AM 22.Aug.2020) TCPAT4 BULLETIN Tropical Storm Marco Intermediate Advisory Number 7A NWS National Hurricane Center Miami FL AL142020 200 AM EDT Sat Aug 22 2020 ...MARCO MOVING NORTH-NORTHWESTWARD TOWARD THE YUCATAN PENINSULA... SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...19.1N 85.2W ABOUT 150 MI...240 KM SE OF COZUMEL MEXICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NNW OR 335 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * Punta Herrero to Cancun Mexico A Tropical Storm Warning is in effect for... * Punta Herrero to Dzilam Mexico A Hurricane Watch means that hurricane conditions are possible within the watch area, in this case within 24 hours. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 AM EDT (0600 UTC), the center of Tropical Storm Marco was located near latitude 19.7 North, longitude 85.2 West. Marco is moving toward the north-northwest near 13 mph (20 km/h). A slightly slower northwestward motion is expected for the next day or so, followed by an increase in forward speed by early next week. On the forecast track, the center of Marco will approach the east coast of the Yucatan Peninsula of Mexico today. The center will then cross the northeastern part of the Yucatan Peninsula tonight and move over the central Gulf of Mexico toward the northwestern Gulf on Sunday and Monday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Additional strengthening is forecast during the next couple of days as the system approaches the Yucatan peninsula and Marco could be near hurricane strength when it moves over the central Gulf of Mexico on Sunday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The minimum central pressure estimated by 53rd Air Force Reserve reconnaissane aircraft observations is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected to first reach the eastern Yucatan coast within the warning area this afternoon and will spread northward and westward within the warning area tonight, making outside preparations difficult or dangerous. Hurricane conditions are also possible within the hurricane watch area by this evening. RAINFALL: Marco is expected to produce the following rainfall accumulations through Sunday: Eastern portions of the Mexican states of Quintana Roo and Yucatan: 3 to 6 inches, isolated maximum totals of 10 inches. This rainfall may result in areas of flash flooding. Northeast Nicaragua and the Cayman Islands: 1 to 2 inches. NEXT ADVISORY ------------- Next complete advisory at 500 AM EDT. $$ Forecaster Roberts |
