


Tropical Weather Discussion
Issued by NWS
Issued by NWS
221 AXNT20 KNHC 111025 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 1215 UTC Fri Jul 11 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 0600 UTC surface analysis and satellite imagery through 0930 UTC. ...TROPICAL WAVES... A tropical wave is analyzed near 24W from 06N-17N, moving west at around 5-10 kt. Scattered moderate convection is active from 07.5N-14N and E of 27W. A tropical wave is analyzed near 38W-39W, from 08N-20N, moving west at around 10-15 kt. Scattered moderate convection is noted from 07.5N-09.5N between 38W and 43W. A tropical wave is along 61W-62W from 07N to 18N, moving west at 15 kt. Saharan Air surrounds the wave environment north of 13N, and continues to inhibit convection. A few clusters of scattered moderate isolated strong convection have recently developed just ahead of the wave from 11.5N-14N between 63W and 67W. A tropical wave is analyzed near 75W from 20N to northern Colombia, moving west at around 15 kt. Scattered moderate to strong convection is noted along the monsoon trough along 10N-11N, and over the S half of Colombia. A tropical wave previously analyzed near 89W has shifted westward of the Atlantic basin and is now across Guatemala and the adjacent eastern tropical Pacific. ...MONSOON TROUGH/ITCZ... The monsoon trough enters the Atlantic near 15N17W to 07N42W. The ITCZ extends from 07N42W to 05N53W. Aside from the convection related to the tropical waves described above, scattered showers are noted along the ITCZ mainly W of 50W. ...GULF OF AMERICA... A 1020 mb high is centered near 27N87W, leading to light to gentle anticyclonic winds across most of the Gulf. Slight seas of 4 ft and less prevail across the basin. The diurnal thermal trough is exiting the Yucatan Peninsula and entering the Bay of Campeche, accompanied by moderate to locally fresh NE to E winds along the western and northwestern coastal waters of the Yucatan Peninsula. Scattered small cells of moderate convection dot the Gulf from 22.5N-26.5N between the Florida Keys and 94W. For the forecast, weak high pressure will prevail across the basin through the forecast period. Fresh to strong NE to E winds will pulse along the Yucatan Peninsula each afternoon and evening as a trough develops inland daily and shifts westward over the Bay of Campeche at night. A surface trough is expected to develop across Florida by Mon and drift westward into the eastern Gulf on Tue, accompanied by active weather. ...CARIBBEAN SEA... Refer to the section above for details on convection associated with the tropical waves. A moderate pressure gradient between a 1025 mb Bermuda High and lower pressure along the monsoon trough over the SW Caribbean is forcing fresh to strong trades over the central Caribbean, while moderate to fresh winds accompany a tropical wave entering the eastern Caribbean. Gentle to moderate winds prevail elsewhere to the north and west. Rough seas to 9 ft are in the south-central and SW Caribbean, moderate seas in the central and E Caribbean, and slight seas in the NW Caribbean. Dry and stable middle level conditions are combining with Saharan Air across much of the basin to limit convection to near the tropical wave entering the basin and along the monsoon trough. Otherwise, fair and hazy skies prevail. For the forecast, the pressure gradient between the Bermuda High and low pressure over NW Colombia and the SW basin will continue to support pulsing fresh to strong trades and rough seas across the south-central Caribbean through the forecast period. Fresh east winds are expected across the Gulf of Honduras, mainly at night, into early next week. Moderate to fresh winds and moderate seas are expected in the eastern Caribbean through the weekend while gentle to moderate winds and slight to moderate seas will prevail elsewhere. ...ATLANTIC OCEAN... Refer to the section above for details on convection associated with the tropical waves and the monsoon trough over the basin. A broad surface ridge continues to dominate the basin between 15W and the southeastern U.S., extending along roughly along 32N-33N. A 1025 mb Bermuda High is centered near 33N60W and extends southwestward across the northern Bahamas and into southern Florida, while a 1026 mb Azores High is near 32N21W. A modest pressure gradient between the ridge and lower pressures near the ITCZ/monsoon trough is producing only moderate to fresh trades west of 40W and moderate trades between the Cabo Verdes and 40W. Recent satellite scatterometer data showed fresh to locally strong trades across the northern coastal waters of Puerto Rico and Hispaniola extending through the southern Bahamas, as well as between the Canary Islands and coastal Western Sahara. Moderate seas prevail over these forecast waters, except for seas 7 to 8 ft from 11N to 15N between 50W and the Lesser Antilles. Stable atmospheric conditions are being reinforced by a broad swath of Saharan Air that prevails over most of the trade wind zone south of 23N, and is limiting convection. Scattered popcorn convection dots the northern waters from 26N-31N between 52W and 67W, while a few clusters of moderate convection persist across the northwest waters north of 30N between 71W and 80W. For the forecast west of 55W, the Bermuda High will gradually shift eastward and weaken through the upcoming weekend. The related pressure gradient will support gentle to moderate winds, except for fresh to locally strong east to southeast winds off the northern coast of Hispaniola through Sat. Winds and seas will diminish Sun through early Mon, then increase modestly Tue. $$ Stripling