{"msg": "877\nAXNT20 KNHC 181711\nTWDAT \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1815 UTC Sun Oct 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 \n1700 UTC.\n...SPECIAL FEATURES...\nGulf of America Gale Warning: A cold front extends from the\nFlorida Straits across the S Gulf to the Bay of Campeche.\nScattered moderate convection is occurring along and just ahead of\nthe front, with gusty and erratic winds and seas occurring in\nareas of thunderstorms. Strong to gale-force N to NE winds and \nvery rough seas up to 20 ft follow the front, highest seas over \nthe SW Gulf offshore Veracruz. Fresh to strong NE winds with \nfrequent gusts to gale force will continue over the NE Gulf \nthrough this afternoon. The front will slowly drift southeast of \nthe Gulf through Tue as it weakens. Gale-force winds will persist \nover the SW Gulf through tonight. Very rough seas up to 20 ft will\npersist in the Bay of Campeche through this afternoon, with rough\nseas prevailing across central and southern portions of the basin\nthrough Tue.\nAtlantic Gale Warning: The cold front mentioned above currently \nextends from 31N72W to the Florida Straits as it moves SE across \nthe western Atlantic. Scattered moderate convection is occurring \nalong and just ahead of the front, with gusty and erratic winds \nand seas occurring in areas of thunderstorms. North winds of 25 to\n30 kt are behind the front, with frequent gusts to gale-force. \nVery rough seas behind the front have built to near 20 ft, with \nrough seas occurring along the FL coast and N of Grand Bahama. The\nfront will continue drifting southeastward, reaching from near \n31N70W to western Cuba by Monday evening, and then will stall and\ndissipate through midweek. Gale-force gusts are expected to \ncontinue across the waters between 70-75W and N of 30N through \nMonday morning. Very rough seas of up to 20 ft in N to NE swell \nwill expand across the waters N and NE of the Bahamas through \nMonday morning as well, with rough seas expanding across all of \nthe waters N of the Bahamas and the Turks and Caicos through \nTuesday morning.\nPlease read the latest High Seas Forecast issued by the National \nHurricane Center under AWIPS/WMO headers FZNT02 KNHC/HSFAT2 or at \nwebsite https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml for further \ndetails.\n...MONSOON TROUGH/ITCZ...\nThe monsoon trough extends from the African coast near 11N15W to \n06N17W. The ITCZ extends from near 06N17W to 04N29W to 11N45W,\nwhere it is broken by a surface trough. The ITCZ then resumes from\n11N49W to 11N57W. Scattered moderate convection is occurring from\n08N to 17N between 35W and 60W. Scattered showers and isolated \nthunderstorms are also occurring along the coasts of Sierra Leone \nand Liberia.\n...GULF OF AMERICA...\nSee Special Features section above for information on the Gale\nWarnings and hazardous marine conditions across much of the Gulf.\nOutside of the areas of gale-force winds, rough to very rough \nseas, and convection, moderate to fresh NE winds and moderate \nseas prevail in the NW Gulf, as well as the far SE Gulf near the \nYucatan Channel.\nFor the forecast, strong high pressure building over the lower \nMississippi Valley behind the front, will continue to support \nfresh NE to E winds over the eastern half of the Gulf into mid-\nweek.\n...CARIBBEAN SEA...\nAn upper level trough is interacting with abundant moisture and\nthe East Pacific monsoon trough in the far SW Caribbean, \nsupporting scattered moderate convection S of 17N and W of 75W.\nOutside of convection, moderate to fresh trades and 4-6 ft seas \nprevail in the central Caribbean. Gentle to moderate or weaker\nwinds and slight seas prevail elsewhere.\nFor the forecast, a weaker pressure gradient across the region \ndue to the passage of a cold front across the Bahamas and the \nsouthern Gulf of America will maintain moderate to fresh trades in\nthe south-central Caribbean through Thu and moderate or weaker \nwinds elsewhere. The cold front will likely reach western Cuba and\nthe Yucatan Channel Mon night into Tue where it will stall before\ndissipating. Moderate to fresh NE winds and moderate to rough \nseas will likely impact the Yucatan Channel and NW Cuba adjacent \nwaters through early Wed morning. \n...ATLANTIC OCEAN...\nSee Special Features section above for information on a Gale\nWarning and hazardous marine conditions for waters offshore \nFlorida and the Bahamas.\nMultiple surface troughs in the central Atlantic are supporting\nscattered showers and isolated thunderstorms N of 20N between 40W\nand 55W. Recent scatterometer data confirm fresh to strong E winds\nand 6-8 ft seas to the N of a surface trough, generally from 23N \nto 30N between 35W and 45W. Moderate to fresh E to NE winds and\nmoderate seas are also ongoing N of 20N and E of 30W. The\nremainder of the basin is seeing gentle to moderate or weaker\ntrades and 3-6 ft seas prevail.\nFor the forecast west of 55W, a cold front extends from 31N72W to\nthe Straits of Florida followed by strong to near gale-force \nnortherly winds and rough to very rough seas. A low pressure is \nforecast to develop along the frontal boundary N of area later \nthis morning bringing gale-force winds N of 30N between 70W and \n75W through tonight. The front will reach from 31N71W to the \ncentral Bahamas and the Straits of Florida by early Mon morning, \nand from near 31N70W to western Cuba by early Mon night where it \nwill stall before dissipating into midweek. Marine conditions \nassociated with the front will affect mainly the waters W of 65W \nthrough Tue, although seas will linger through much of the week. \n", "title": "Atlantic Tropical Weather Discussion", "id": "1219864446442405890", "issued": "2026-10-18T18:15:00Z", "wmo": "AXNT20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1219864446442405890"}