000 AXNT20 KNHC 090018 TWDAT Tropical Weather Discussion...Update NWS National Hurricane Center Miami FL 0005 UTC Thu Sep 9 2021 Tropical Weather Discussion for North America, Central America Gulf of Mexico, Caribbean Sea, northern sections of South America, and Atlantic Ocean to the African coast from the Equator to 31N. The following information is based on satellite imagery, weather observations, radar and meteorological analysis. Based on 1800 UTC surface analysis and satellite imagery through 0000 UTC. Updated Special Features section below ...SPECIAL FEATURES... Hurricane Larry is centered near 28.9N 59.8W at 09/0000 UTC or 325 nm SE of Bermuda moving NW at 13 kt. Estimated minimum central pressure is 968 mb. Maximum sustained wind speed is 90 kt with gusts to 110 kt. Seas are peaking at 40 ft near the center with little change expected for the next two days. Numerous moderate and scattered strong convection is noted within 60 NM of the center and scattered moderate and isolated strong convection elsewhere within 180 NM of the center. Larry will continue on a NW track through Thu morning, then the center of Larry should pass east of Bermuda on Thu, and move near or over southeastern Newfoundland late Friday. Gradual weakening is forecast during the next couple of days, but Larry is expected to remain a hurricane during that time. Please read the latest High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml and the latest NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. Tropical Storm Mindy is centered near 29.6N 85.4W at 09/0000 UTC or 20 nm WSW of Apalachicola Florida moving NE at 18 kt. Estimated minimum central pressure is 1004 mb. Maximum sustained wind speed is 40 kt with gusts to 50 kt. Scattered moderate convection is noted within 60 NM of the center. Seas to 8 ft just south of Apalachicola. On the forecast track, the center of Mindy is expected to cross the coastline of the Florida Panhandle during the next hour of two, and then move offshore of the southeastern United States into the western Atlantic Ocean by tomorrow. Please read the latest Offshore Zones Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAOFFNT4.shtml and the latest NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. ...TROPICAL WAVES... An Atlantic tropical wave is along 24W from 19N southward across the Cabo Verde Islands, and moving W near 15 kt. Scattered showers are noted from 09N to 14N between 20W and 25W. Another Atlantic tropical wave is near 39W from 16N southward and moving W near 15 kt. Scattered moderate convection is found from 08N to 15N between 35W and 42W. A third Atlantic tropical wave is along 60W from 15N southward across Guyana, and moving W at 10 to 15 kt. Scattered showers and isolated thunderstorms are present over N Guyana and NE Venezuela. ...MONSOON TROUGH/ITCZ... A monsoon trough passes through the Senegal-Guinea Bissau border near 13N16W to 15N26W. Farther W, the ITCZ extends from 07N41W to 07N58W, just N of Guyana-Suriname border. Scattered moderate convection is seen SW of the monsoon trough from 06N to 08N between 30W and 33W. Scattered moderate to isolated strong convection is evident near the ITCZ from 06N to 09N between 45W and 57W. ...GULF OF MEXICO... Refer to the Special Features section above for details on Tropical Storm Mindy. Moderate to locally fresh S to SW winds and seas at 3 to 5 ft are found across the central and southwest Gulf, especially near stronger thunderstorms. Gentle to moderate SE to S winds are occurring at the SE Gulf, while light to gentle winds are seen for the W Gulf; seas at both areas are near 3 ft. For the forecast, Tropical Storm Mindy near 29.0N 86.3W 1008 mb at 5 PM EDT moving NE at 18 kt. Maximum sustained winds 35 kt gusts 45 kt. Mindy will move inland to 30.3N 84.1W Thu morning, weaken to a tropical depression near 31.3N 80.0W Thu afternoon, 32.3N 75.6W Fri morning, 32.9N 72.7W Fri afternoon, become a remnant low and move to 33.4N 69.6W Sat morning, and 33.3N 68.5W Sat afternoon. Mindy will dissipate Sun afternoon. On the forecast track, the center of Mindy is expected to cross the coastline of the Florida Panhandle later tonight. ...CARIBBEAN SEA... Convergent trade winds are combining with an upper-level trough across W Cuba and the N central basin to trigger scattered showers and isolated thunderstorms over the central and E basin, including Jamaica. Converging surface winds near the E end of the E Pacific monsoon trough are causing isolated thunderstorms near the coast of Honduras, Guatemala and W Panama. Moderate to locally fresh trades and seas of 4 to 5 ft are evident over the central basin. Gentle to moderate trades and seas at 2 to 4 ft prevail for the rest of the basin. For the forecast, swells generated by Hurricane Larry will continue to propagate across the Atlantic waters of the Leeward Islands, Puerto Rico, and Hispaniola through tonight. Seas will gradually subside from E to W. As Larry moves N of the forecast region on Thu, the Atlantic ridge will build westward N of the Caribbean Sea bringing an increase in the trade wind flow late Thu into Fri. ...ATLANTIC OCEAN... Please see the Special Features section above for details on Major Hurricane Larry SE of Bermuda. SW of Bermuda, a surface trough near 27N68W is coupling with an upper-level trough near 30N70W to trigger scattered showers and isolated thunderstorms N of 28N between 67W and 70W. Farther W, converging SW to W winds are producing similar conditions from the NW Bahamas and northward to near 30N. Refer to the Tropical Waves and Monsoon Trough/ITCZ sections for additional convection across the Atlantic Basin. Large swell generated by Larry are creating 7 to 11 ft seas from N of Cuba, Hispaniola, Puerto Rico and the Leeward Islands to beyond 31N. Seas at 6 to 10 ft are seen E of Larry, N of 21N between 45W and 53W. Moderate to locally fresh NE trades and seas at 5 to 7 ft are found near the Canary Islands N of 17N between the NW African coast and 28W. Light to gentle with locally moderate trades and seas of 4 to 6 ft prevail for the remainder of the basin. For the forecast, large swells generated from Hurricane Larry, passing well E of the area, will continue to propagate across the SW N Atlantic. Seas of 8 ft or more can be expected mainly E of 70W tonight, spreading to 75W Thu, and potentially 80W Thu night into Fri. Tropical Storm Mindy, currently located in the Gulf of Mexico near 29.0N 86.3W is expected to cross the coastline of the Florida Panhandle later tonight, and then move offshore of the southeastern United States into the western Atlantic Ocean by tomorrow. $$ Torres/Landsea