000 AXPZ20 KNHC 020937 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Sun Jan 2 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 0600 UTC surface analysis and satellite imagery through 0900 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec gale warning: Strong gales and seas to 18 ft are forecast for the Gulf of Tehuantepec starting tonight and lasting into Tue. Strong high pressure will build behind a cold front forecast to move through the western Gulf of Mexico Sun and southern Mexico Sun night. The resulting tightening pressure gradient along with cold, drier air following the front will combine to deliver gap winds reaching strong gale force across the Gulf of Tehuantepec tonight through early Tue morning. Peak seas will build 16-18 ft offshore before winds start to diminish below gale force early Tue. The gale- force gap winds will generate a large plume of swell in excess of 8 ft extending as far as 700 nm downstream from the Gulf of Tehuantepec through mid week. For further details, please see the latest NWS High Seas Forecast issued by the National Hurricane Center, at the website: https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N79W to 07.5N95W. Segments of the ITCZ extend from 07.5N95W to 06N110W to 09N120W, from 09N122W to 09N130W, and from 09N132W to beyond 09N140W. Scattered moderate convection is noted from 12N to 15N between 130W and 135W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Cooler air and building high pressure north and west of the region are supporting fresh winds over the Gulf of California, as registered by a scatterometer satellite pass from around 0530 UTC. The scatterometer also showed locally fresh to strong gap NE gap winds on the Pacific coast of Baja California, just north of Punta Eugenia, and near the San Ignacio Lagoon in northern Baja California Sur. Seas are likely 3 to 5 ft in the Gulf of California, and 5 to 7 ft elsewhere north of 20N. Farther south, the building ridge pattern is supporting a small area of fresh to strong N winds off Cabo Corrientes with 5 to 6 ft seas. Gentle NW winds and 3 to 5 ft are noted elsewhere south of 20N. For the forecast, high pressure building west of the area will continue to support fresh to strong northerly winds across most of the Gulf of California through tonight, with fresh NW winds persisting over the central Gulf of California through Thu. Fresh to strong NW winds off Cabo Corrientes will diminish later today. A gale force gap wind event is expected to commence across the Gulf of Tehuantepec region late tonight and continue into early Tue morning. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Fresh E gap winds prevail over the Gulf of Papagayo region this evening and extend offshore to near 90W, with light to gentle winds elsewhere north of the monsoon trough. Moderate N winds are over the Gulf of Panama, with gentle to moderate winds over the remainder of the waters south of the monsoon trough. Seas are in the 5-6 range across the Gulf of Papagayo, and 3-6 ft across the rest of the forecast waters. For the forecast, moderate to locally fresh gap winds will continue over the Gulf of Papagayo region for the next few days. Fresh to strong pulsing will return to the Gulf of Papagayo Mon night. Light to gentle winds will occur elsewhere north of the monsoon trough, with gentle to moderate winds elsewhere south of the monsoon trough. REMAINDER OF THE AREA High pressure is centered north of 20N west of 120W. A scatterometer satellite pass from 05 UTC indicated fresh to strong winds between the high pressure and a pair of surface troughs farther south in the deep tropics. A pair of recent ship observations showed strong winds near 15N130W and 15N134W, north of these surface troughs. Recent altimeter passes showed seas of 8 to 9 ft in this area as well, mainly between 10N and 20N west of 120W. An upper trough is evident from 05N to 15N between 130W and 135W. This is enhancing scattered showers and thunderstorms from 10N and 15N between 130W and 135W. Elsewhere, gentle to moderate NE to E winds are evident north of 10N, with gentle to moderate SE to S winds elsewhere south of 10N, with 4 to 6 ft seas. For the forecast, NW swell will continue to spread southward and subside through today. High pressure behind the front will settle along about 30N on Mon to produce a broad area of fresh to locally strong trade winds from 12N to 24N and W of 120W through mid week. Additional northerly swell in excess of 8 ft will enter the waters north of 25N west of 125W Mon night and Tue, and reinforce the earlier swell to create 8 to 11 ft seas over much of the area north of a line from Los Cabos to 05N140W by mid week. Farther east, swell generated from the gale event in the Gulf of Tehuantepec will bring mixed swell in excess of 8 ft east of 110W from 06N to 13N from late Mon into mid week. $$ Christensen