{"msg": "012\nAXPZ20 KNHC 200849\nTWDEP\nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1005 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 0600 UTC surface analysis and satellite imagery through\n0830 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 into tonight. Seas in these waters \nare rough. Winds will diminish to strong Wed, but are likely to \nincrease to gales again Thu night and Fri.\nSouth of Southern Mexico (Invest EP94): Satellite images \nindicate that the circulation of a low pressure system located a \nfew hundred miles south of the Gulf of Tehuantepec is becoming \nbetter defined. The associated showers and thunderstorms are also\nbeginning to show signs of organization, and a tropical \ndepression is forecast to form during the next day or so. This \nsystem is expected to move westward to west-northwestward at \naround 10 kt during the next few days, remaining well offshore \nof southern Mexico. There is a high chance of tropical formation\nof this low within the next 48 hours and over the next 7 days. \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.\nElsewhere outside from the T'pec gale area, a weak pressure \ngradient is leading to mainly gentle NW 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 into tonight, along with rough to very rough\nseas. Winds will diminish to strong Wed, but are forecast to \nincrease to gale-force again Thu night through Fri. Satellite images \nindicate that the circulation of a low pressure system located a \nfew hundred miles south of the Gulf of Tehuantepec is becoming \nbetter defined. The associated showers and thunderstorms are also\nbeginning to show signs of organization, and a tropical \ndepression is forecast to form during the next day or so. This \nsystem is expected to move westward to west-northwestward at \naround 10 kt during the next few days, remaining well offshore \nof southern Mexico. There is a high chance of tropical formation\nof this low within the next 48 hours and over the next 7 days.\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 into Wed.\nWinds will pulse nightly to fresh in the Papagayo region, with\nlocally strong pulses possible late this week. Moderate or \nweaker winds and moderate seas will prevail.\n...REMAINDER OF THE AREA...\nFresh to strong winds 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. \nTo the north, a cold front extends along 30N and W of 135W. Fresh\nwinds prevail in the vicinity of the front. Elsewhere, mainly \ngentle winds 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. Satellite images indicate that the circulation\nof a low pressure system located a few hundred miles south of \nthe Gulf of Tehuantepec is becoming better defined. The \nassociated showers and thunderstorms are also beginning to show \nsigns of organization, and a tropical depression is forecast to \nform during the next day or so. This system is expected to move \nwestward to west-northwestward at around 10 kt during the next \nfew days, remaining well offshore of southern Mexico. There is a \nhigh chance of tropical formation of this low within the next 48 \nhours and over the next 7 days.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1220331994250674178", "issued": "2026-10-20T10:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1220331994250674178"}