{"msg": "388\nAXPZ20 KNHC 202105\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n2205 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 1800 UTC surface analysis and satellite imagery through\n2000 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 into Fri night.\nGale Warning South of Southern Mexico (Invest EP94): A low-\npressure system located a few hundred miles south of the Gulf of \nTehuantepec is producing a large area of showers and \nthunderstorms that are gradually becoming better organized, and a\ntropical depression is forecast to form during the next day or \nso. This system is expected to move westward to west-\nnorthwestward at 5 to 10 kt during the next few days, remaining \nwell offshore of southern Mexico. A large area of fresh to strong\nwinds and rough seas surround this low center, and these winds\nand seas are expected to increase over the next day or so. A Gale\nWarning has been issued as a result, for Wed into Thu. There is\na high chance of tropical formation of this low within the next \n48 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 04N106W. The ITCZ \nstretches from 04N106W to 09N112W and from 06N130W to 03N140W. \nScattered moderate to isolated strong convection is noted from \n00N to 15N E of 105W and from 01N to 08N and W of 130W.\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.\nElsewhere, weak low pressure centered E of the Revillagigedo\nIslands is leading to moderate NW winds through the islands.\nOtherwise, light to gentle winds and moderate seas prevail,\nexcept for slight seas in the Gulf of California. \nFor the forecast, high pressure settled over Mexico will \ncontinue to funnel northerly gap winds of gale-force into the \nGulf of Tehuantepec into tonight. Seas in these waters are \nrough. Winds will diminish to strong by Wed, but will increase \nto gales again Thu night through Fri night. A low- pressure \nsystem located a few hundred miles south of the Gulf of \nTehuantepec is producing a large area of showers and \nthunderstorms that are gradually becoming better organized, and a\ntropical depression is forecast to form during the next day or \nso. This system is expected to move westward to west- \nnorthwestward at 5 to 10 kt during the next few days, remaining \nwell offshore of southern Mexico. There is a high chance of \ntropical formation of this low within the next 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 well offshore Guatemala deriving \nfrom gap winds in the Gulf of Tehuantepec will decay tonight. \nWinds will pulse nightly to fresh in the Papagayo region. \nModerate or weaker winds and moderate seas will prevail \nelsewhere.\n...REMAINDER OF THE AREA...\nSee Special Features section above for information on a Gale\nWarning issued in association with a low pressure system that has\na potential for tropical development. \nElsewhere, fresh NW winds and rough seas are increasing behind a\ncold front that extends from 30N138W to 38N136W. Moderate or\nweaker winds and moderate seas dominate the remainder of the\nbasin. \nFor the forecast, as the cold front moves SE tonight, fresh to\nstrong winds and very rough seas will impact waters N of 26N\nthrough Wed, with rough seas reaching as far south as 20N Thu. A\nlow- pressure system located a few hundred miles south of the \nGulf of Tehuantepec is producing a large area of showers and \nthunderstorms that are gradually becoming better organized, and a\ntropical depression is forecast to form during the next day or \nso. This system is expected to move westward to west- \nnorthwestward at 5 to 10 kt during the next few days, remaining \nwell offshore of southern Mexico. A large area of fresh to strong\nwinds and rough seas surround this low center, and these winds \nand seas are expected to increase over the next day or so. A Gale\nWarning has been issued as a result, for Wed into Thu. There is \na high chance of tropical formation of this low within the next \n48 hours. \n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1220476785729732610", "issued": "2026-10-20T22:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1220476785729732610"}