{"msg": "363\nAXPZ20 KNHC 210842\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1005 UTC Wed Oct 21 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...\nGale Warning South of Southern Mexico (Invest EP94): A 1007 mb low-\npressure system located south of the Gulf of Tehuantepec near 10N98W\nis producing 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 \nduring the next few days, remaining well offshore of southern \nMexico. A large area of fresh to strong winds and rough seas \nsurround this low center, and these winds and seas are expected \nto increase over the next day or so. A Gale Warning has been \nissued as a result, for today into Thu. There is a high chance of\ntropical formation of this low within the next 48 hours. \nGulf of Tehuantepec Gale Warning: High pressure over Mexico will\nsupport pulses of gale-force gap winds and rough seas across the\nGulf of Tehuantepec tonight and again Wed night.\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 11N85W to 1007 mb low pressure \n(Invest EP94) near 10N98W, then onward to 06N105W. The ITCZ \nextends from 05N105W to 06N140W. Scattered moderate to isolated \nstrong convection is noted from 05N to 13N between 95W and 105W, \nand from 05N to 08N between 130W and 140W.\n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nPlease see the Special Features section above for information on\nthe developing low pressure over southern mexico and the gale \nwarning in the Gulf of Tehuantepec.\nLight to gentle breezes and moderate seas prevail, except for \nslight seas in the Gulf of California. \nFor the forecast, outside of areas off southern Mexico impacted\nby the developing low pressure and the pulsing gales in the Gulf\nof Tehuantepec, gentle to moderate breezes and moderate seas \nwill persist through Sat night. \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 \nhas a potential for tropical development. \nElsewhere, a 1008 mb occluded low pressure area is centered near\n31N130W, with an associated cold front extending from 30N123W to\n25N130W to 25N140W. Fresh to strong NW winds and rough to very\nrough seas with maximum wave heights to 16 ft follow the front.\nFarther east, scattered showers and thunderstorms along with strong\nto near- gale force winds and seas to 11 ft are likely within 90\nnm of the developing low pressure near 10N98W (Invest EP94), \nsouth of the Gulf of Tehuantepec. Gentle to moderate winds and \nmoderate waves in a mix of swell are noted elsewhere. \nFor the forecast, the front will dissipate through late Thu as \nit continues to moves westward, with following winds and seas \ndiminishing as they spread southward over the waters north of 15N\nand west of 125W. Marine conditions will deteriorate off \nsouthern Mexico through Sun as Invest EP94 continues to develop. \nGentle to moderate winds and moderate seas will persist \nelsewhere. \n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1220613741668958210", "issued": "2026-10-21T10:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1220613741668958210"}