{"msg": "099\nAXPZ20 KNHC 161432\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1605 UTC Wed Sep 16 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\n1430 UTC.\n...SPECIAL FEATURES...\nGulf of Tehuantepec Gale Warning: The pressure gradient between \nhigh pressure over southern Mexico and the eastern north Pacific\nmonsoon trough will support strong to near-gale force N to NE \ngap winds across the Gulf of Tehuantepec today and Thu, and will \nreach minimal gale force overnight tonight and briefly Thu night.\nRough seas will accompany these gap winds.\n...TROPICAL WAVES...\nThe axis of a tropical wave is near 111W from 02N to 17N, moving\nwest 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 07N97W to 12N114W to\n10N120W, then from 10N131W to beyond 12N140W. Scattered moderate\nconvection is noted from 04N to 10N E of 92W, and from 04N to \n14N between 104W and 140W.\n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nPlease see Special Features section above for more on a gale \nwarning in the Gulf of Tehuantepec. \nScattered showers and thunderstorms are active near weak low \npressure over the central Gulf of California. Associated moderate\nto fresh winds are over the northern Gulf of California. Gentle \nto moderate winds and 4-7 ft are noted elsewhere, except 1-3 ft \nin the central and southern Gulf.\nFor the forecast, please see the Special Features section for \ninformation about the gale warning in the Gulf of Tehuantepec. \nElsewhere, scattered showers and thunderstorms are active near \nweak low pressure over the central Gulf of California. Fresh to \nlocally strong winds associated with the low pressure will \npersist mainly over the northern Gulf through tonight. Gentle to \nmoderate breezes and moderate seas will persist elsewhere. \n...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, \nAND WITHIN 750 NM OF ECUADOR...\nFresh to strong easterly winds, and moderate seas, prevail \nacross the Gulf of Papagayo region, extending downstream to near \n90W. Moderate to fresh winds extend downstream from the Gulf of\nPapagayo to the outer offshore waters of El Salvador and \nGuatemala. Elsewhere, moderate or weaker winds and moderate seas \nare noted.\nFor the forecast, the pressure gradient between a ridge north of\nthe area and the eastern north Pacific monsoon trough will \nsupport pulsing fresh to occasionally strong easterly winds and \nmoderate to rough seas across the Papagayo region into Thu, then \npulsing to moderate to fresh thereafter. Moderate winds and seas \nwill prevail elsewhere. \n...REMAINDER OF THE AREA...\nThe remnant low of TD Fifteen-E is centered near 16N128W. \nScattered showers and thunderstorms remain active in the vicinity\nof the low. Fresh to strong winds, and rough seas, are within \n120 nm to the north of the center. This is all part of a larger \narea of fresh to strong winds and rough seas between the low \npressure and the subtropical ridge north of the area, reaching \nfrom 14N to 23N west of 125W. Farther south, cross- equatorial SW\nswell to 8 ft is reaching as far north as 04N between 110W and \n125W. Gentle to moderate winds and 4-6 ft combined seas in mixed \nswell are noted elsewhere. \nFor the forecast, a broad area of fresh to strong NE to E winds\nand moderate to rough seas in N swell will persist through the \nremainder of the week from 15N to 25N west of 125W. The \nsoutherly swell south of 03N will subside below 8 ft by this \nevening.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1210773608071233538", "issued": "2026-09-16T16:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1210773608071233538"}