{"msg": "585\nAXNT20 KNHC 180434\nTWDAT \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n0615 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 0000 UTC surface analysis and satellite imagery through \n0432 UTC.\n...TROPICAL WAVES...\nA far eastern tropical wave has its axis along 19.5N. It is \nmoving westward at about 10 kt. Isolated convection is depicted \nfrom 07N to 12N between 16W and 21W. \nA central Atlantic tropical wave has its axis near 38W, extending\nfrom 02N to 18N, and moving westward at 10 to 15 kt. No \nsignificant convection is associated with this wave at this time.\nAnother central tropical wave is approaching the Lesser Antilles \nwith its axis near 59.5W, south of 19N, moving westward at around\n15 kt. Scattered moderate convection is depicted from 12N to 20N\nbetween 56W and 62W. \nA Caribbean tropical wave has its axis along 78W south of 20N. It\nis moving westward at about 10 kt. Numerous moderate convection \nis depicted south of 14N and west of 75W. \n...MONSOON TROUGH/ITCZ...\nThe monsoon trough axis enters the Atlantic through 16N17W and \ncontinues southwestward to 11N21W to 10N43W, where it transitions\nto the ITCZ, then continues to 11.5N55W. Isolated moderate\nconvection is depicted from 10N to 13N between 26W and 34W and\nbetween 44.5W and 53W. Additional convection is discussed in the \nTropical Waves section above.\n...GULF OF AMERICA...\nHigh pressure of 1018 mb, centered near 26N85W, dominates the \nGulf waters, supporting mainly gentle winds and slight seas. \nOffshore the Florida Panhandle moderate SW to W winds have \ndeveloped in associated with a trough N of the area. Moderate to \nfresh N to NE winds are over the central and eastern Bay of \nCampeche due to a westward moving trough that is along the west \ncoast of the Yucatan Peninsula. Seas 2 to 4 ft over the waters \nwhere these winds are present. \nFor the forecast, high pressure will prevail across the Gulf \nwaters through the week. A weak pressure gradient 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...\nNumerous moderate convection is noted in the NW basin W of 83W, \nin association with the interaction of a tropical wave to the SE \nand a surface trough over the Yucatan Peninsula. See the Tropical \nWaves section above for information on further convection caused \nby the tropical wave as well as additional thunderstorms entering \nthe eastern basin in association with a second tropical wave. \nFresh to locally strong trades and rough seas dominate the central\nbasin, with moderate to fresh trades in the eastern and southwest\nbasin, along with moderate seas. In the NW basin, away from \nconvection where locally higher winds and seas are likely, gentle \nwinds and slight seas prevail.\nFor the forecast, the subtropical ridge centered north of the \nCaribbean waters will support fresh to strong easterly trade winds\nand rough seas across the south-central Caribbean through much of\nthe forecast period. Moderate to fresh trades and moderate seas \nwill prevail in the north-central and eastern Caribbean into the \nweekend. Elsewhere, moderate or lighter winds and slight to \nmoderate seas are expected. \n...ATLANTIC OCEAN...\nA cold front extends from a 1014 mb low center north of the area \nnear 33N53W southwestward to 31N53.5W to 27N61W and northwestward\nto 31N74W. East of the front, to about 46W, and N of 27N, \nscattered moderate convection and fresh to strong SW winds \nprevail. To the W, south of the boundary to 24.5N, scattered \nmoderate convection also is ongoing. \n \nThe central and eastern subtropical Atlantic is under the \ninfluence of a 1028 mb high pressure center located north of\nthe Azores. Its related gradient is supporting moderate or weaker\nwinds and moderate seas.\nFor the forecast west of 55W, the aforementioned cold front will \nstall and weaken into a trough by Tue. Fresh to locally strong \nwinds in the vicinity of the front will diminish tonight. \nOtherwise, a weak pressure gradient will support mainly light to \ngentle winds, locally moderate, across much of the area N of 22N \nthrough the week. Moderate to locally fresh easterly winds can be \nexpected S of 22N.\n", "title": "Atlantic Tropical Weather Discussion", "id": "1202445872253632519", "issued": "2026-08-18T06:15:00Z", "wmo": "AXNT20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1202445872253632519"}