{"msg": "494\nAXPZ20 KNHC 130929\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1005 UTC Fri Nov 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 0600 UTC surface analysis and satellite imagery through\n0920 UTC.\n...SPECIAL FEATURES...\nSignificant NW Swell Event: A series of NW swell sets will\ncontinue to impact the waters N of 10N the next several days. \nCurrently, seas are 12 to 14 ft W of a line from 30N122W to \n20N140W, with peak seas around near 29N130W, and wave periods of \n13-14 seconds. A reinforcing and larger set of NW swell will \narrive later today, with peak seas around 22 ft near 30N135W by \nearly this evening. By Sat afternoon, this set with seas of 12 \nft or greater will reach across the waters W of 30N118W to \n20N132W to 20N140W and peak seas of 22 ft near 30N126W. Those \nseas will keep spreading SE, while yet another set with seas of \n12 ft or greater arrives to 30N140W by late Sat night, spreading \nacross the majority of the waters into early next week. Please \nread the latest NHC High Seas Forecast at website: \nhttps://www.hurricanes.gov/text/HSFEP2.shtml for more details.\n...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...\nThe monsoon trough extends from Panama near 07N78W to 06N92W to \n07N101W. The ITCZ begins near 06N107W and extends to 03N127W to\n04N140W. Scattered moderate to isolated strong convection is \nobserved from 02S to 06N E of 90W, and from 03S to 16N between \n110W and 140W.\n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nFresh to strong northerly winds are in the Gulf of Tehuantepec \nsupported by the pressure gradient between a high pressure system\nover southern United States and Mexico, and lower pressure with \nthe monsoon trough south of the area. Seas in this waters are 5-9\nft. Meanwhile, a weak pressure gradient is present in the \nremainder of the Mexican offshore waters with mainly light to\ngentle winds and decaying NW swell producing seas of 5-7 ft \nacross much of the area S of Punta Eugenia, except for slight \nseas in the Gulf of California. North of Punta Eugenia, seas are\nalready rough to 8 ft as a new set of long-period NW swell is\nentering the region. \nFor the forecast, fresh to strong northerly winds and rough seas\naround 9 ft will continue through tonight across the Gulf of \nTehuantepec. The next Tehuantepec gap wind event is forecast to \nbegin by Mon evening and continue through much of the next week. \nWinds may reach gale-force starting Tue evening, if not sooner. \nMeanwhile, a weakening cold front will move across the offshore \nwaters of Baja California today, bringing fresh winds and a batch\nof rough seas approaching 12 ft. Fresh to locally strong winds \nmay also briefly impact the northern Gulf of California today. \nThen, a larger NW swell arriving Sat will produce high seas to 19\nft. Rough seas will reach all the way to past 100W by early next\nweek, while additional and reinforcing NW swell sets continue to\narrive. \n...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, \nAND WITHIN 750 NM OF ECUADOR...\nThe pressure gradient has diminished in the Gulf of Papagayo\nregion due to a cold front moving across the Gulf of America and\nnorthern Florida. This is resulting in light to gentle winds, \nand slight to moderate seas across the Central America offshores. \nOtherwise, moderate or weaker SSW winds and moderate seas of 5 to\n7 ft are prevalent between the Galapagos Islands and the coast of \nEcuador. Slightly higher winds and seas are possible due to\nclusters of moderate to strong convection. \nFor the forecast, moderate to fresh winds are forecast to return\nto the Papagayo region by Sat night, reach strong speeds by Mon \nnight, and continue through Thu. Moderate N winds may pulse in \nthe Gulf of Panama early next week. Otherwise, moderate or weaker\nwinds and moderate seas in merging SW and NW swell will prevail,\nexcept locally rough SSW of the Galapagos Islands through \ntonight. Looking ahead, a set of NW swell may build seas to 8 ft \nor greater SSW of the Galapagos Islands by the middle of next \nweek.\n...REMAINDER OF THE AREA...\nPlease refer to the Special Features section above for details on\na series of significant NW swell sets which will impact much of\nthe open waters.\nA weakening cold front continues to move southeastward across \nthe subtropical waters, extending from 30N120W to 22N130W to \n20N140W. The pressure gradient between high pressure centered \nwell WNW of the area, and the aforementioned front sustains \nmoderate to fresh NW-N winds behind the front. Old and decaying \nNW swell supports seas of 7-9 ft out ahead of the front while 10 \nto 14 ft seas in long period NW swell are behind the front. \nModerate to fresh NE to E winds and rough seas to 10 ft are found\nfrom 12N to 20 and west of 136W. Merging SW and NW swells \nsupports combined seas of 7-9 ft across much of the waters S of \n10 between 94W and 125W. Elsewhere, winds are moderate or weaker\nwith moderate seas.\nFor the forecast, the aforementioned cold front will move across\nthe northern waters through this morning, bringing with it fresh\nto strong winds on either side of the front, and very large seas\nin NW swell north of 20N through today. Another cold front will \nsweep across the area today into the weekend, bringing even \nlarger reinforcing NW swell, possibly reaching 24 ft along 30N. \nThis set of swell with seas of 8 ft or greater will cover the \nwaters N of 05N and W of 110W by late Sat night, then covering \nall of the waters W of 105W. Yet another set of large swell will \narrive Sun, with seas of 8 ft or greater across the entire waters\nW of 105W by late Sun night, then across the waters W of 95W by \nTue evening. Meanwhile, the mixed swell over the equatorial \nwaters will diminish by the weekend. Looking ahead, another cold \nfront may move into the NW waters by the end of the weekend into \nearly next week bringing a large area of fresh to strong winds \nbehind it as high pressure builds in.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1227134640624140290", "issued": "2026-11-13T10:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1227134640624140290"}