{"msg": "310\nAXPZ20 KNHC 132250 CCA\nTWDEP \nTropical Weather Discussion...Corrected\nNWS National Hurricane Center Miami FL\n2205 UTC Fri Nov 13 2026\nCorrected Special Features section\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 1800 UTC surface analysis and satellite imagery through\n2145 UTC.\n...SPECIAL FEATURES...\nSignificant NW Swell Event: A series of northwest swell sets will \ncontinue to impact the waters north of about 10N for the next \nseveral days. Currently, seas are 11 to 16 ft north of 24N west of \n120W as seen latest altimeter satellite data passes. Wave period is \n15-18 seconds. A reinforcing and larger set of NW swell will arrive \ntonight, with peak seas around 22 ft near 30N135W by early this \nevening. By Sat afternoon, this set with seas of 12 ft or greater \nwill reach across the waters W of about 30N118W to 20N132W to \n20N140W and peak seas of 22 ft near 30N134W. These seas will keep \nspreading southeastward as yet another set with seas of 12 ft or \ngreater arrives to near 30N140W by late Sat night, spreading across \nthe majority of the waters into early next week. Please read the \nlatest 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 axis extends from northwest Colombia westward\nto across northern Costa Rica and to 10N86W to 05N100W and to \n07N114W. The ITCZ extends from 06N127W to beyond 05N140W.\nScattered moderate convection is within 30 nm of the ITCZ west \nof 135W.\n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nFresh to strong north winds are in the Gulf of Tehuantepec \nsupported by the resultant pressure gradient between a high \npressure system over southern United States and Mexico, and lower\npressure associated to the monsoon trough south of the area. A\nrecent Ascat scatterometer data pass nicely captured these winds.\nSeas over these waters are 6 to 8 ft. Meanwhile, a weak pressure\ngradient that is present across the remainder of the Mexican \noffshore waters is generally allowing for mainly light to gentle\nwinds. Recent altimeter satellite data passes reveal seas of 6 to 8 \nft in subsiding northwest swell over the waters south of Punta \nEugenia and east to near 107W. Slightly lower seas of 5 to 7 ft are \nelsewhere over the Mexican offshore waters outside the Gulf of \nTehuantepec region. North of Punta Eugenia, rough seas in the range \nof 8 to 13 ft are present as a new set of long-period NW swell \ncontinues to propagate through the waters west of Baja California \nNorte.\nFor the forecast fresh to strong northerly winds and rough seas \naround 8 ft will continue over the Gulf of Tehuantepec into \nearly on Sat. The next Tehuantepec gap wind event is forecast to \nbegin by Mon evening, and continue through much of the next week.\nWinds there may reach gale-force starting late Tue and possibly \ncontinue through most of the period through Wed night. Fresh \nnorthwest winds west of Baja California north of Punta Eugenia \nwill diminish on Sat. Very rough seas from an expansive set of\nnorthwest swell over these waters will peak to around 20 ft Sat \nnight before gradually subsiding afterward. Fresh to locally \nstrong winds in the northern Gulf of California will diminish by \nearly Sat. Another rather expansive set of northwest swell expected \non Sat should build seas to around 19 ft over the outer offshore \nwaters of Baja California Norte. Rough seas will reach all the way \nto past 100W, while additional and reinforcing northwest swell sets \ncontinue to arrive. \n...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, \nAND WITHIN 750 NM OF ECUADOR...\nA weakened pressure gradient is generally providing for light \nto gentle winds over the Central American offshore waters as \nnoted in recent Ascat scatterometer data. Slight to moderate seas \nare over these waters.  Otherwise, moderate or weaker south-\nsouthwest winds and moderate seas of 5 to 7 ft are present between \nthe Galapagos Islands and the coast of Ecuador. Slightly higher \nwinds and seas are possible due to clusters of numerous moderate to \nstrong convection offshore Ecuador and Colombia that extend westward \nto near 85W. \nFor the forecast, moderate to fresh northeast to east winds are \nforecast to return to the Papagayo region by late Sat night, \nreach strong speeds by Mon night, and continue through Thu. \nModerate N winds may pulse in the Gulf of Panama early next week.\nOtherwise, moderate or weaker winds and moderate seas in merging \nsouthwest and northwest swell remain through the next few days. \nLooking ahead, a set of northwest swell may build seas to 8 ft or \ngreater SSW of the Galapagos Islands by the middle of next week. \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 dissipating cold front extends from 30N115W south-southwestward\nto 27N116W and to 24N121W, where it transitions to a trough to\nnear 21N135W. Latest Ascat scatterometer data shows fresh to \nstrong west to northwest winds north of the front. Seas of 9 to \n14 ft in northwest swell are northwest of front while seas of 8 \nto 12 ft are north of the trough, and southeast of the trough to \na line from 15N121W to 09N140W. Another cold front has recently \nentered the NW part of the area, and is analyzed from near \n30N134W to 29N140W. Seas of 11 to 16 ft in northwest swell follow\nthis front. This front will sweep across the northern through \nSat night while weakening as yet another cold front makes its \nentrance into the far NW part of the area. Fresh to strong north \nto northeast winds will follow in behind this front as well as \nanother set of long-period northwest swell with period of 15-17 \nseconds and seas possibly up to 19 ft.\nModerate to fresh trades are over the waters from 10N to 20N\nwest of 136W and from 12N to 18N between 120W and 136W. Seas \nover these waters are 8 to 11 ft in long-period northwest swell.\nMerging southwest and northwest swell supports combined seas of 7 to \n9 ft over the waters S of 10N between 94W and 125W. Elsewhere, winds \nare moderate or weaker along with moderate seas as detected in \nlatest Ascat scatterometer data and by recent altimeter data passes.\nFor the forecast, the fresh to strong west to northwest winds\nbehind the dissipating cold front will diminish to moderate \nspeeds early on Sat as the dissipating frontal boundary reaches \nfrom near 27N114W to 21N125W and to 16N140W. Very large seas in \nNW swell will follow in behind the frontal boundary. The second\nnew cold front will move across the northwest and north-central \nwaters through Sun bringing an even larger reinforcing northwest \nswell set, possibly reaching 23 ft along 30N. This set of swell with \nseas of 8 ft or greater will cover the waters north of 05N and west \nf 110W by late Sat night, then covering all of the waters west of \n105W. Yet another set of large swell will arrive Sun, with seas of 8 \nft or greater across the entire waters W of 105W by late Sun night, \nthen across the waters west of 95W by Tue evening. Meanwhile, the \nmixed swell over the equatorial waters will diminish by early Sat. \nLooking ahead, another cold front may move into the northwest waters \nby the end of the weekend and into early next week bringing a large \narea of fresh to strong winds behind it as high pressure builds in \nbehind the front. An additional pulse of large northwest swell will \nbe following in behind this front.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1227292031560253447", "issued": "2026-11-13T22:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1227292031560253447"}