{"msg": "676\nAXPZ20 KNHC 131453\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1605 UTC Thu Aug 13 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\n1450 UTC.\n...SPECIAL FEATURES...\nTropical Storm Hernan is centered near 18.0N 131.9W at 13/1500\nUTC, moving west-southwest at 3 kt. Estimated minimum central\npressure is 1004 mb. Maximum sustained wind speed is 40 kt with\ngusts to 50 kt. Seas are peaking near 13 ft, or 4 M. Scattered \nmoderate to strong convection is noted within 60 nm NE \nsemicircle. A slow southwestward to southward motion is expected\nover the next 24-36 hours. Little change in intensity is \nexpected over the next 12 hours or so, followed by gradual \nweakening as Hernan encounters increasingly dry mid-level air.\nPlease read the latest HIGH SEAS FORECAST issued by the National\nHurricane Center at website - \nhttps://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest \nHernan NHC Forecast/Advisory and Public Advisory at \nwww.hurricanes.gov for more details.\n...TROPICAL WAVES...\nThe axis of a tropical wave is near 94W north of 02N, moving \nwest at 10 to 15 kt. Nearby convection is discussed in the \nITCZ/monsoon trough section below.\nThe axis of a tropical wave is near 125W from 02N to 18N, moving\nwestward at 10 to 15 kt. Nearby convection is discussed in the \nITCZ/monsoon trough section below.\n...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...\nThe monsoon trough extends from 09N84W to 08N92W to 08N101W. The\nITCZ extends from 08N101W to 10N121W. Scattered moderate to \nisolated strong convection is from 04N to 10N between 85W and \n101W, and from 03N to 13N between 102W and 134W. \n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nFresh to locally strong winds prevail over the Gulf of \nTehuantepec. Fresh SW gap winds are impacting the northern Gulf\nof California. Gentle to moderate winds are found elsewhere. \nModerate seas are over the open waters off Mexico, with slight to\nmoderate seas over the Gulf of California.\nFor the forecast, pulses of fresh to strong gap winds across the\nGulf of Tehuantepec will diminish through tonight, then return \nFri through Mon. A moderate pressure gradient will promote mostly\ngentle to moderate winds across the remainder offshore waters of\nMexico along with moderate seas. \n...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, \nAND WITHIN 750 NM OF ECUADOR...\nFresh to strong E gap winds and moderate seas persist across and\ndownstream the Gulf of Papagayo. Gentle to moderate winds and \nmoderate seas in SW swell prevail elsewhere. \nFor the forecast, moderate to fresh NE to E gap winds and \noccasionally rough seas will pulse across the Papagayo region. \nGentle to moderate winds will prevail between the Galapagos \nIslands and Ecuador, with large southerly swell moving into the \nregion starting Thu night. Light to gentle winds and moderate \nseas in SW swell are expected elsewhere. \n...REMAINDER OF THE AREA...\nPlease see Special Features section above for more on Tropical \nStorm Hernan. \nBroad ridging dominates the waters north of 20N. Outside the\nimmediate area impacted by Hernan, the pressure gradient between\nthe ridge, Hernan, and newly formed Tropical Storm Lala in the \ncentral Pacific is supporting fresh to locally strong winds, and \nrough seas, from 12N to 22N between 130W and 140W. Rough seas in \nsoutherly swell cover the waters S of 05N between 100W and 125W. \nGentle to moderate winds, and moderate seas prevail elsewhere.\nFor the forecast, Hernan will move to 17.6N 132.0W this evening,\n17.1N 132.1W Fri morning, weaken to a remnant low near 16.5N \n132.7W Fri evening. Elsewhere, southerly swell will maintain \nrough seas over the discussion waters S of 05N between 95W and \n130W through the end of the week.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1201151671273914375", "issued": "2026-08-13T16:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1201151671273914375"}