Tropical Weather Discussion

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Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Tue Dec 23 2025 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 1800 UTC surface analysis and satellite imagery through 2000 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: The pressure gradient between high pressure north of the area and the eastern north Pacific monsoon trough will support fresh to near gale-force northerly gap winds and moderate to rough seas in the Gulf of Tehuantepec through the end of the week. Winds in Tehuantepec will pulse to gale-force tonight and Wed night. Seas will peak around 11 ft (3.5 M) with the strongest winds. Conditions will improve by the weekend. Northern Waters Gale Warnings: A cold front extends from low pressure north of the area near 32N128W to 30N129W to 20N140W. Strong to locally gale- force winds are in the vicinity of the front in the northern waters, and will continue this evening mainly north of 28N. Winds will diminish below gale- force during the overnight hours. Seas will build to near 12 ft (4.0 M) with this system early tonight. A second low will pass north of the area. Gale force winds south of the low will impact the northern waters, mainly N of 29N Wed into Wed evening. The low will shift northward, with gale force winds shifting N of the area late Wed night. The low will then weaken Thu into Fri, with winds over the discussion area diminishing below strong speeds Thu night. This system will generate a new set of large NW swell, which will reinforce the very rough seas generated from the first gale force system. Combined seas of 12 to 18 ft (3.5-5.5 M) will spread over the northern waters, covering much of the waters N of 24N and W of 125W by Thu before starting to subside. Please read the latest High Seas Forecast issued by the National Hurricane Center at website: https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more information. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09.5N85W to 06N95W to 10N113W. The ITCZ continues from 10N113W to 11N131W. It resumes from 10N138W to beyond 10N140W. Scattered moderate convection is noted from 08N to 20N between 108W and 121W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please read the Special Features section for more details on a Gale Warning in the Gulf of Tehuantepec. Aside from the Gulf of Tehuantepec, gentle to moderate winds are noted off Baja California Norte, over the northern Gulf of California, and near the Revillagigedo Islands. Elsewhere, light to gentle winds, and slight to moderate seas prevail. For the forecast, aside from the Gulf of Tehuantepec, a cold front will approach the offshore waters of Baja California Norte, supporting fresh to strong southerly winds tonight into Wed. Northwest swell will propagate into the waters north of Punta Eugenia tonight into Wed. A reinforcing swell will spread rough seas across the offshore waters of the Baja California peninsula the end of the week into the weekend. Fresh to strong southerly winds will develop in the northern Gulf of California Wed night into Thu. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong winds are over the Gulf of Papagayo, with moderate winds extending westward to near 90W. Moderate winds are in the Gulf of Panama and off the coast of Colombia. Gentle winds are elsewhere N of 02N. S of 02N, gentle to locally moderate winds prevail. Seas are in the 3-5 ft range, except reaching 6 ft in the Gulf of Papagayo. For the forecast, the pressure gradient between high pressure north of the area and the eastern north Pacific monsoon trough will support pulsing fresh to strong northeast to east gap winds in the Gulf of Papagayo over the next several days. Mainly gentle to moderate north winds are expected in the Gulf of Panama during the period, occasionally reaching fresh speeds at night. Moderate or lighter winds and slight to moderate seas are expected elsewhere through the period. ...REMAINDER OF THE AREA... Please read the Special Features section for more details on two Gale Warnings in the northern waters. Aside from the area of low pressure with a gale warning, a high pressure prevails across the waters N of 20N, anchored by a 1017 mb high near 24N115W. The pressure gradient between this area of high pressure and lower pressure in the vicinity of he ITCZ is supporting fresh to locally strong winds N of the ITCZ to near 18N between 114W and 117W. Elsewhere, winds are moderate or weaker along with moderate seas. For the forecast, aside from the gale warnings discussed above, winds will be moderate or weaker through the period. Large NW swell generated from the two gale force systems will spread rough seas SE across the discussion waters. Seas greater than 8 ft will cover much of the waters N of 10N and W of 110W on Sat before seas start to subside.