


Tropical Weather Discussion
Issued by NWS
Issued by NWS
053 AXNT20 KNHC 270559 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 0615 UTC Fri Jun 27 2025 Tropical Weather Discussion for North America, Central America Gulf of America, 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 0500 UTC. ...SPECIAL FEATURES... Significant Rainfall in Central America/Western Caribbean: The interaction between a couple of tropical waves that are described below, and abundant tropical moisture over the same area will continue to enhance the chances for heavy rain and strong thunderstorms over the western Caribbean and across portions of Central America through at least Friday. This will increase the potential for flash flooding and mudslides, especially in hilly terrain. According to the latest model guidance, the heaviest rainfall is expected to be near the northeast coast of Nicaragua and in northern Honduras. Please refer to the local Weather Services in the region for more information. ...TROPICAL WAVES... An eastern Atlantic tropical wave is near 34W from 15N southward, and moving west around 15 kt. No significant convection is seen near this wave. A central Atlantic tropical wave is near 50W from 17N southward, and moving west around 15 kt. Scattered moderate to isolated strong convection is present from 11N to 13N between 47W and 51W. A western Caribbean tropical wave is near 82W from 16N southward across western Panama into the East Pacific. It is moving west at 10 to 15 kt. Scattered heavy showers and isolated thunderstorms are evident near the coast southeastern Nicaragua and northeastern Honduras. Another tropical wave is near 89W from the northern Yucatan Peninsula southward across Guatemala and El Salvador into the East Pacific. It is moving west at 5 to 10 kt. Scattered heavy showers and isolated thunderstorms are occurring at the Gulf of Honduras. ...MONSOON TROUGH/ITCZ... A monsoon trough enters into the Atlantic along the coastal border of Senegal and Gambia, then curves southwestward to 09N31W. An ITCZ extends westward from 08N35W to 08N38W, and from 08N51W to the northern coast of Guyana near Georgetown. Widely scattered moderate convection is found near and up to 120 nm north of the first ITCZ segment between 43W and 46W, and the entire second ITCZ segment. The eastern end of the East Pacific monsoon trough is triggering isolated thunderstorms in the Caribbean waters near Panama and northwestern Colombia. ...GULF OF AMERICA... Two surface troughs are generating widely scattered showers and isolated thunderstorms at the northeastern Gulf, and off Tampico, Mexico. Otherwise, modest ridging is dominating the eastern Gulf with light to gentle winds and 1 to 2 ft seas. Gentle to moderate E to SE winds and seas of 2 to 4 ft prevail for the rest of the Gulf. For the forecast, showers and thunderstorms related to two tropical waves over the Yucatan Peninsula and in the far northwestern Caribbean are forecast to shift west-northwestward into the Bay of Campeche Sat or Sat night. The northern portion of the wave could induce a low pressure to form in the Bay of Campeche. Otherwise, a surface ridge will dominate the Gulf waters through early next week. Fresh to locally strong NE to E winds will pulse each evening and night north of the Yucatan Peninsula and in the eastern Bay of Campeche due to a locally tighter pressure gradient induced by a thermal trough. ...CARIBBEAN SEA... Refer to the Special Features section regarding the potential for heavy rainfall over portions of the western Caribbean and Central America. Convergent trade winds are creating widely scattered showers and isolated thunderstorms at the lee of western Cuba and near the Cayman Islands. Refer to the Monsoon Trough/ITCZ and Tropical Waves sections for additional convection in the Caribbean Sea. Tight gradient between the Bermuda High near 28N66W and lower pressure at northern Colombia are sustaining strong to locally near-gale easterly winds and 9 to 11 ft seas at the south-central basin. Fresh to strong E to ESE winds and seas of 6 to 9 ft are noted at the north-central basin. Light to gentle winds and 2 to 4 ft seas in moderate NE swell are seen near Costa Rica and Panama. Moderate to fresh E to SE winds and seas at 5 to 7 ft prevail elsewhere in the Caribbean Sea. For the forecast, the two tropical waves mentioned in the Tropical Waves sections will sustain scattered deep convection capable of producing locally heavy rainfall over the far western basin and adjacent portions of Central America into the weekend. Also, fresh to strong trades across the central basin will last into early next week. In particular, winds will pulse to near-gale force off Colombia and in the Gulf of Venezuela, with moderate to rough seas. Fresh to locally strong winds over the Gulf of Honduras will continue through the weekend. ...ATLANTIC OCEAN... An upper-level low near 27N61W is triggering widely scattered moderate convection north of 26N between 58W and 65W. Refer to the Monsoon Trough/ITCZ and Tropical Waves sections at the beginning for additional convection in the Atlantic Basin. A subtropical ridge extends southwestward from a 1028 mb Azores High across 31N40W to a 1022 mb Bermuda High near 28N66W. These features are supporting light to gentle winds with 3 to 4 ft seas north of 25N between 35W and the coast of northeastern Florida and southern Georgia. For the Atlantic waters from 09N to 25N between 35W and the Bahamas/Lesser Antilles, moderate with locally fresh NE to E winds and seas at 5 to 7 ft dominate. Gentle to moderate E to SE winds and seas of 3 to 5 ft in moderate mixed swells prevail for the remainder of the Atlantic west of 35W. For the forecast west of 55W, the aforementioned Bermuda High and associated ridge will prevail across the region into the middle of next week. Moderate to fresh E to SE winds and moderate seas will prevail south of 25N. Fresh to strong E winds will pulse from late afternoons into the overnights north of Hispaniola through early next week. Gentle to moderate winds and slight to moderate seas are expected elsewhere. $$ Chan