Tropical Weather Discussion
Issued by NWS
Issued by NWS
357 AXPZ20 KNHC 211502 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Wed Jan 21 2026 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 1430 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Gale- force N gap winds over the Gulf of Tehuantepec will diminish this morning. Fresh to strong gap winds and occasionally rough seas will then continue into Fri morning. 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 details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 04.5N102W. The ITCZ continues from 04.5N102W to beyond 08N140W. Scattered moderate convection is noted from 04N to 08N between 99W and 120W, and from 08N to 20N between 130W and 140W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A Gale Warning remains in effect for the Tehuantepec region. Refer to the Special Features section above for details. Outside of the Tehuantepec area, gentle to moderate winds and moderate seas persist across the Mexican offshore waters. For the forecast, aside from the Tehuantepec gale, gentle to moderate winds will prevail through the weekend. Another gap wind event in the Gulf of Tehuantepec may start Sun night. ....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to strong gap winds, and seas of 7 to 10 ft, prevail across the Gulf of Papagayo, extending southwest to 90W. Rough seas of 7 to 9 ft are well offshore Guatemala in swell generated by the Gulf of Tehuantepec gale force gap wind event. Moderate to fresh N winds and 4 to 6 ft seas are evident across the Gulf of Panama. Elsewhere, winds are moderate or weaker with seas in the 3 to 5 ft range. For the forecast, the pressure gradient between high pressure north of the area and the eastern north Pacific monsoon trough will support fresh to strong NE to E winds and rough seas in the Papagayo region through the weekend. The pressure gradient will also support pulsing of moderate to fresh N winds over the Gulf of Panama through the end of the week. Elsewhere, winds will be moderate or weaker over the forecast waters through the end of the week. NW to N swell generated by gales over the Gulf of Tehuantepec will bring rough seas well offshore Guatemala through today. ...REMAINDER OF THE AREA... A plume of combined seas of 8 to 9 ft consisting of shorter- period NE and E winds waves generated from the ongoing Tehuantepec and Papagayo gap wind events mixing with longer period NW swell extends across the area from 04N to 10N between 95W and 114W. Subsiding NW swell is producing seas of 8 ft over the waters from 12N to 22N and west of 135W. Gentle to moderate breezes and moderate combined seas, primarily in NW swell, dominate elsewhere. For the forecast, the plume of rough seas that originated from the gap wind events will subside through tonight. The large NW swell will further subside through the middle of the week. Elsewhere, winds should remain moderate or weaker, with seas less than 8 ft, for the next several days. $$ AL