{"msg": "430\nAXNT20 KNHC 181525\nTWDAT\nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1215 UTC Tue Aug 18 2026\nTropical Weather Discussion for North America, Central America\nGulf of America, Caribbean Sea, northern sections of South\nAmerica, and Atlantic Ocean to the African coast from the\nEquator to 31N. The following information is based on satellite\nimagery, weather observations, radar and meteorological analysis.\nBased on 1200 UTC surface analysis and satellite imagery through \n1500 UTC.\n...TROPICAL WAVES...\nA far eastern tropical wave has its axis along 26N, south of 19N,\nmoving westward at about 10 kt. No significant convection is\nevident near this tropical wave.\nA central Atlantic tropical wave has its axis near 42W, south of \n18N, moving westward at 10 to 15 kt. No significant convection is\nassociated with this wave at this time.\nAn eastern Caribbean tropical wave has its axis near 64W, south \nof 19N, moving westward at around 15 kt. Scattered moderate \nconvection is observed from 15N to 18N and between 59W and 67W. \nA southwest Caribbean tropical wave has its axis along 83W, south\nof 20N, moving westward at about 10 kt. Scattered moderate\nconvection is evident from 10N to 15N west of 80W.\n...MONSOON TROUGH/ITCZ...\nTh monsoon trough enters the Atlantic through the coast of\nMauritania near 20N16W and continues southwestward to 11N40W. The\nITCZ extends from 11N44W to 08N55W to 10N60W. Scattered moderate \nto isolated strong convection is evident from 11N to 15N and east\nof 37W.\n...GULF OF AMERICA...\nWeak high pressure across the Gulf waters support moderate or \nweaker winds and slight to moderate seas across much of the basin.\nFor the forecast, high pressure will prevail across the Gulf \nwaters through the week. A weak pressure pattern will support \nmostly gentle to moderate winds across much of the basin. A \ndiurnally induced surface trough will generate fresh to locally \nstrong winds north and west of the Yucatan peninsula early each \nevening. These winds will spread westward away from the Yucatan at\nnight as the trough migrates into the SW Gulf. Slight to moderate\nseas are expected through the forecast period. \n...CARIBBEAN SEA...\nThe subtropical ridge centered north of the Caribbean is\nsupporting moderate to fresh easterly trade winds and seas of 5-8\nft across much of the basin, especially south of 18N. Light to\ngentle winds and slight to moderate seas are found elsewhere. \nFor the forecast, the pressure gradient between a ridge N of the area \nand the Colombian low will support will support fresh to strong \ntrade winds and rough seas across the south-central Caribbean \nthrough much of the forecast period. Moderate to fresh trades and \nmoderate seas will prevail in the north-central and eastern \nCaribbean into the weekend. Elsewhere, moderate or lighter winds \nand slight to moderate seas are expected.  \n...ATLANTIC OCEAN...\nA cold front extends from a 1014 mb low center north of the area \nnear 37N48W southwestward to 29N55W to 1015 mb low pressure near\n28N64W, then northwestward to 31N72W. Scattered moderate to \nisolated strong convection is noted along and ahead of the front.\nModerate to fresh SW-S winds and seas of 5-8 ft are noted north \nof 28N and ahead of the front to 45W. The remainder of the \ntropical Atlantic is dominated by a broad subtropical ridge that \nsustains moderate or lighter winds and moderate seas. However, \nfresh northerly winds and seas of 5-8 ft are found in the far \neastern Atlantic off NW Mauritania and southern Western Sahara.\nFor the forecast west of 55W, the aforementioned front will \nweaken into a trough by tonight. A weak pressure gradient will \nsupport mainly light to gentle winds, locally moderate, across \nmuch of the area N of 22N through the week and into the weekend. \nModerate to locally fresh easterly winds can be expected S of 22N.\n", "title": "Atlantic Tropical Weather Discussion", "id": "1202573733982896135", "issued": "2026-08-18T12:15:00Z", "wmo": "AXNT20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1202573733982896135"}