000 AXPZ20 KNHC 181537 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Fri Nov 18 2022 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 1200 UTC surface analysis and satellite imagery through 1550 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Gale-force winds continue to prevail across the Gulf of Tehuantepec, with winds and accompanying rough seas extending 315 nm downstream. Winds are expected to diminish below gale force by early Sat morning as northerly winds in the Bay of Campeche diminishes. Fresh to near gale force winds will prevail on Sat and increase again to gale force Sun morning, continuing into Tue morning. Seas during the second gale event will build to 12 ft. For further details, please see the latest NWS High Seas Forecast issued by the National Hurricane Center at https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08N83W to 10N110W. The ITCZ continues from 10N110W to 08N140W. Scattered moderate convection is noted north of 04N and east of 83W, from 08N to 16N between 105W and 122W, and from 05N to 16N between 127W and 133W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Refer to the section above for details on the Gale Warning currently in effect for the Gulf of Tehuantepec. High pressure building southward through the SW U.S. is leading to fresh winds in the central and northern Gulf of California. Elsewhere, a weak pressure gradient is supporting mostly gentle to moderate winds across the region, with moderate seas. For the forecast, gale-force winds will continue across the Gulf of Tehuantepec through tonight as a cold front moves through southern Gulf of Mexico. Fresh winds over the Gulf of California will weaken today. Seas to 8 ft will build north of Isla Guadalupe tonight into Sat in NW swell. The next gale over the Tehuantepec region is expected to begin on Sun as a front moves across southern Mexico. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh gap winds are ongoing in the Papagayo region. Elsewhere, gentle to moderate S to SW winds are across the Central and South America offshore waters south of 10N with 3 to 5 ft in SW swell. Gentle variable winds and slight seas prevail elsewhere. For the forecast, moderate to fresh easterly NE to E winds will persist across the Gulf of Papagayo and coast of Nicaragua through early next week. Wave heights will likely build to 7 ft beyond 90 nm off Guatemala through the end of the week due to swell generated from gale force gap winds nearby in the Gulf of Tehuantepec. Gentle to moderate winds will persist elsewhere through the forecast period along with slight to moderate seas. REMAINDER OF THE AREA... Broad surface ridging persists north of 10N, supporting moderate to fresh trade winds from 10N to 25N west of 110W, with 5 to 7 ft wave heights, although pockets of seas to 8 ft are noted along the ITCZ and near outflow from sporadic convection. NW swell W of 130W is leading to seas of 8 to 10 ft N of 10N. For the forecast, moderate to fresh easterly winds will prevail into early next week across most of the basin as a reinforcing NW swell moves in. Seas will build to 9 ft near the ITCZ west of 125W as high pressure north of the area supports a broad area of fresh trade winds, and mixes with the decaying long-period swell. SW swell will support seas building to 9 ft along and south of 03.5S tonight into Sat. $$ Ramos