{"msg": "180\nAXNT20 KNHC 180933\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 0600 UTC surface analysis and satellite imagery through \n0925 UTC.\n...TROPICAL WAVES...\nA far eastern tropical wave has its axis along 24N, south of 19N,\nmoving westward at about 10 kt. A few showers are noted near the\nwave axis.\nA central Atlantic tropical wave has its axis near 40W, 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 62W, south \nof 19N, moving westward at around 15 kt. Scattered moderate \nconvection is observed south of 19N and between 57W and 67W. \nA SW Caribbean tropical wave has its axis along 80W, south of \n20N, moving westward at about 10 kt. Scattered moderate to\nisolated strong convection is present south of 15N and west of\n75W.\n...MONSOON TROUGH/ITCZ...\nTh monsoon trough enters the Atlantic through the coast of\nMauritania near 19N16W and continues southwestward to 11N30W and\nto 09N46W. The ITCZ extends from 09N46W to 10N58W. Scattered\nmoderate to isolated strong convection is evident from 06N to 15N\nand east of 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, a weak high pressure pattern will support mostly \ngentle to moderate winds across much of the basin. A diurnally \ninduced surface trough will generate fresh to locally strong winds\nnorth and west of the Yucatan peninsula early each evening. These\nwinds will spread westward away from the Yucatan at night as the \ntrough migrates into the SW Gulf. Slight to moderate seas are \nexpected 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 subtropical ridge centered north of the\nCaribbean waters will support fresh to strong easterly trade\nwinds and rough seas across the south-central Caribbean through\nmuch 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 1013 mb low center north of the area \nnear 37N49W southwestward to 31N51W to 26N63W and northwestward \nto 31N71W. Scattered moderate to isolated strong convection is\nnoted ahead of the front. Moderate to fresh SW-S winds and seas of\n5-8 ft are noted north of 26N and ahead of the front to 44W. The\nremainder of the tropical Atlantic is dominated by a broad\nsubtropical ridge that sustains moderate or lighter winds and\nmoderate seas. However, fresh northerly winds and seas of 5-8 ft\nare found in the far eastern Atlantic off NW Mauritania and\nsouthern Western Sahara.\nFor the forecast west of 55W, the aforementioned cold front will \nstall and weaken into a trough today into tonight. Fresh winds in \nthe vicinity of the front will diminish today. Otherwise, a weak \npressure gradient will support mainly light to gentle winds, \nlocally moderate, across much of the area N of 22N through the \nweek and into the weekend. Moderate to locally fresh easterly \nwinds can be expected S of 22N.\n", "title": "Atlantic Tropical Weather Discussion", "id": "1202504520658386951", "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/1202504520658386951"}