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| #1013687 (Received by flhurricane at: 4:47 PM 24.Aug.2020) TCPAT4 BULLETIN Tropical Storm Marco Advisory Number 19 NWS National Hurricane Center Miami FL AL142020 400 PM CDT Mon Aug 24 2020 ...MARCO EXPECTED TO CONTINUE TO PRODUCE GUSTY WINDS AND HEAVY RAINFALL OVER PORTIONS OF THE NORTHERN GULF COAST THROUGH THIS EVENING... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...29.0N 88.9W ABOUT 15 MI...20 KM ESE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: There are no coastal watches or warnings in effect. Gusty winds, heavy rainfall, and lingering coastal flooding are expected from Marco along portions of the Gulf Coast through this evening. For information on these hazards see products from your local National Weather Service office. Tropical cyclone wind and surge watches have been issued for portions of the U.S. Gulf Coast for Tropical Storm Laura. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 400 PM CDT (2100 UTC), the center of Tropical Storm Marco was located near latitude 29.0 North, longitude 88.9 West. Marco is moving toward the northwest near 7 mph (11 km/h), a turn to the west-northwest and a slight increase in forward speed is expected to occur tonight. On the forecast track, Marco will move inland over southeastern Louisiana tonight, and across southern Louisiana on Tuesday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Weakening is expected, and Marco is forecast to become a tropical depression tonight and degenerate to a remnant low on Tuesday. Tropical-storm-force winds extend outward up to 80 miles (130 km) from the center. A National Ocean Service weather station located on Petit Bois Island, Mississippi recently reported a wind gust to 38 mph (61 km/h). The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Wind gusts to tropical storm force are possible over the coastal sections of southeastern Louisiana and Mississippi through this evening. RAINFALL: Marco is expected to produce additional rainfall accumulations of 2 to 4 inches with additional isolated totals of 7 inches across portions of the north-central Gulf coast and southeastern United States through Wednesday. Rain totals related to Marco near Apalachicola, Florida reached as high as 11.81 inches on Sunday per a CoCoRaHS report. The additional rainfall may result in areas of flash, urban and small stream flooding along the same area. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast for the next day or so. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A couple of tornadoes are possible late this afternoon through tonight across the Florida Panhandle, southern Georgia, far southern Alabama, and far southern Mississippi. NEXT ADVISORY ------------- Next complete advisory at 1000 PM CDT. $$ Forecaster Latto |
