616 AXNT20 KNHC 100444 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 0605 UTC Thu Aug 10 2023 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 0000 UTC surface analysis and satellite imagery through 0435 UTC. ...SPECIAL FEATURES... NE Atlantic Gale Warning: A strong pressure gradient between the 1024 mb subtropical ridge located north of the Madeira Islands and lower pressures in NW Africa support strong to gale-force northerly winds off the coast of Morocco and Western Sahara, including the Canary Islands. Meteo-France has a gale warning in effect until 11/0000 UTC for the Canarias region with the strongest winds occurring in the water passages between the Canary Islands. For more details, refer to the Meteo-France High Seas Forecast listed on their website https://wwmiws.wmo.int ...TROPICAL WAVES... An eastern Atlantic tropical wave has its axis along 22W, south of 17N, and is moving slowly westward at 5-10 kt. Scattered moderate convection is observed from 06N to 11N and east of 26W. Another eastern Atlantic tropical wave has its axis along 36W, south of 17N, and is moving slowly westward at 5 kt. Scattered moderate convection is noted from 05N to 09N and between 30W and 42W. An eastern Caribbean tropical wave has its axis along 63W, south of 20N, moving W at 15 kt. Scattered moderate convection is evident from 12N to 22N and between 61W and 70W. A central Caribbean tropical wave has its axis along 76W, south of 21N, moving W at 10 kt. No significant convection is noted over water. ...MONSOON TROUGH/ITCZ... The monsoon trough enters the Atlantic through the coast of Senegal near 12.5N16W and continues westward to 09N38W. The ITCZ extends from 09N38W to 09N50W to 11N61W. Convection is described in the tropical waves section. GULF OF MEXICO... The subtropical ridge centered over the central Atlantic extends westward into the Gulf of Mexico, maintaining fairly tranquil weather conditions. The pressure gradient between the ridge and lower pressures over Texas and Mexico support moderate to fresh southerly winds west of 87W. Seas in these waters are 3-6 ft. The strongest winds and highest seas are occurring off southern Texas and NE Tamaulipas. Locally moderate or weaker winds and slight seas prevail elsewhere in the Gulf. For the forecast, surface ridging across the Gulf will support gentle to moderate winds over most of the basin during the next several days. Moderate to fresh winds will prevail across the western Gulf through tonight then pulse through the weekend. A thermal trough will move off the Yucatan Peninsula each night, producing moderate to fresh winds to the northwest of the Yucatan Peninsula through the weekend. CARIBBEAN SEA... Aside from the convection already described in the Tropical Waves section, a few showers and isolated thunderstorms are seen in the nearshore waters of southern Cuba and NW Colombia. A dry airmass is found in the rest of the Caribbean Sea, suppressing the development of convection. Moderate to locally fresh easterly trade winds and seas of 3-5 ft are present in the central and eastern Caribbean. Moderate or weaker winds and slight seas prevail elsewhere. For the forecast, gentle to moderate trade winds will prevail over the Caribbean through tonight, with fresh winds in the south- central basin. A tropical wave will move into the eastern and central Caribbean Thu through Fri, bringing fresh to locally strong winds and moderate seas. On Sat and through the forecast period, fresh to strong winds and moderate seas will pulse across the south central Caribbean in the evening hours, while moderate to fresh winds and moderate seas prevail elsewhere. ATLANTIC OCEAN... Please read the SPECIAL FEATURES section for details on the GALE WARNING in the NE Atlantic. A surface trough located north of Hispaniola and divergence aloft sustain a large area of showers and isolated thunderstorms, especially south of 28N and between 66W and 73W. Farther east, scattered moderate convection is noted north of 25N and between 41W and 53W. The rest of the tropical Atlantic is dominated by a broad subtropical ridge maintaining fairly tranquil weather conditions. Moderate to locally fresh easterly winds are evident south of 25N and west of 55W, along with seas of 4-6 ft. Elsewhere, moderate or weaker winds and slight to moderate seas prevail. For the forecast W of 55W, the subtropical ridge axis will continue to be situated near 27N through much of the week. Moderate to fresh winds can be expected through tonight S of 25N and E of 78W. Later in the week, the northern portion of a tropical wave is expected to move across the southeastern waters. This will increase winds fresh to locally strong with moderate seas across the region Thu through Sat, including the Bahamas. Moderate to fresh winds will resume on Sun. $$ DELGADO