{"msg": "337\nAXPZ20 KNHC 201547\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1605 UTC Tue Oct 20 2026\nTropical Weather Discussion for the eastern Pacific Ocean from\n03.4S to 30N, east of 120W including the Gulf of California, and\nfrom the Equator to 30N, between 120W and 140W. The following\ninformation is based on satellite imagery, weather observations,\nradar, and meteorological analysis.\nBased on 1200 UTC surface analysis and satellite imagery through\n1500 UTC.\n...SPECIAL FEATURES...\nGulf of Tehuantepec Gale Warning: High pressure settled over \nMexico will continue to funnel northerly gap winds of gale-force \ninto the Gulf of Tehuantepec through tonight. Seas in these \nwaters are rough. Winds will diminish to strong Wed, but will \nincrease to gales again Thu night though Fri.\nSouth of Southern Mexico (Invest EP94): A low-pressure system \nlocated a few hundred miles south of the Gulf of Tehuantepec is \nproducing a large area of showers and thunderstorms that are \ngradually becoming better organized, and a tropical depression is\nforecast to form during the next day or so. This system is \nexpected to move westward to west-northwestward at 5 to 10 kt during\nthe next few days, remaining well offshore of southern Mexico.\nThere is a high chance of tropical formation of this low within \nthe next 48 hours. \nPlease read the latest High Seas Forecast issued by the National \nHurricane Center at website \nhttps://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further \ndetails.\n...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...\nThe monsoon trough extends from 10N86W to a 1007 mb low near \n10N95W to 04N107W. The ITCZ stretches from 04N107W to beyond \n03N140W. Scattered moderate to isolated strong convection is \nnoted from 00N to 15N E of 103W and S of 08N and W of 125W.\n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nPlease see the Special Features section above for information on\nthe Gale Warning in the Gulf of Tehuantepec and on a low pressure\nsouth of the Gulf of Tehuantepec that has a potential for\ntropical development.\nElsewhere, a weak pressure gradient is leading to mainly gentle \nNW winds and moderate seas.\nFor the forecast, high pressure settled over Mexico will \ncontinue to funnel northerly gap winds of gale-force into the \nGulf of Tehuantepec through tonight. Seas in these waters are \nrough. Winds will diminish to strong Wed, but will increase to \ngales again Thu night though Fri. A low-pressure system located a\nfew hundred miles south of the Gulf of Tehuantepec is producing \na large area of showers and thunderstorms that are gradually \nbecoming better organized, and a tropical depression is forecast \nto form during the next day or so. This system is expected to \nmove westward to west- northwestward at 5 to 10 kt during the \nnext few days, remaining well offshore of southern Mexico. There \nis a high chance of tropical formation of this low within the \nnext 48 hours. \n...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, \nAND WITHIN 750 NM OF ECUADOR...\nRough seas coming from gale-force gap winds in the Gulf of \nTehuantepec continue to impact waters well offshore Guatemala. \nOtherwise, gentle to moderate winds and moderate seas prevail.\nFor the forecast, rough seas deriving from gap winds in the Gulf\nof Tehuantepec will continue well offshore Guatemala through tonight.\nWinds will pulse nightly to fresh in the Papagayo region, with \nstrong pulses possible late this week. Moderate or weaker winds \nand moderate seas will prevail. \n...REMAINDER OF THE AREA...\nFresh to locally strong originating from a gale-force gap wind \nepisode in the Gulf of Tehuantepec are impacting waters as far \nsouth as 06N between 94W and 101W, along with rough seas. To the \nnorth, a cold front extends along 30N and W of 135W. Fresh winds \nprevail in the vicinity of the front. Elsewhere, mainly gentle \nwinds and moderate seas prevail.\nFor the forecast, the aforementioned gap winds with continue to\nbring periods of fresh to strong N winds and rough seas to waters\nN of 05N between 92W and 103W into mid-week. As the cold front \nmoves S of 30N today, fresh to strong winds and very seas to \nwaters N of 26N through Wed, with rough seas reaching as far \nsouth as 20N Thu. A low-pressure system located a few hundred \nmiles south of the Gulf of Tehuantepec is producing a large area \nof showers and thunderstorms that are gradually becoming better \norganized, and a tropical depression is forecast to form during \nthe next day or so. This system is expected to move westward to \nwest-northwestward at around 10 mph during the next few days, \nremaining well offshore of southern Mexico. There is a high \nchance of tropical formation of this low within the next 48 \nhours.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1220414119348076546", "issued": "2026-10-20T16:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1220414119348076546"}