000 AXPZ20 KNHC 130135 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Wed Jan 13 2021 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0000 UTC surface analysis and satellite imagery through 0240 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: A ridge across the western Gulf of Mexico and the eastern slopes of the Sierra Madre Mountains in Mexico continue to support gale force winds in the 35-40 kt range across the Tehuantepec region. Gale conditions are forecast to persist in the Gulf of Tehuantepec through Thu morning. Large seas generated from this gap wind event will continue to spread well downwind and away from the Tehuantepec area, with seas greater than 12 ft reaching as far as 10N100W tonight. Winds are forecast to diminish below gale force by late Thu morning. Looking ahead, gale conditions are possible in the Gulf of Tehuantepec once again Sat and Sat night. Please read the latest NWS 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 10N74W to 06N85W to 09N115W to 08N122W. The ITCZ continues from 08N122W to 07N140W. Scattered moderate isolated strong convection is noted from 06N to 10N between 103W and 108W, and from 10N to 14N between 105W and 112W. Similar convection is also seen within about 60 nm NW of a line from 11N120W to 07N132W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gale force winds prevail across the Tehuantepec region. Please see Special Features section for more details. Elsewhere, mainly gentle to moderate NW to N winds are expected across the offshore waters of Baja California over the next several days as a ridge remains in place. NW swell, with seas of 8-9 ft, continues to propagate through the waters west of the Baja California peninsula. Additional pulses of large NW swell will reach this region maintaining seas 8 ft or greater over this area through Fri. Gulf of California: High pressure centered over the Great Basin region of United States is supporting fresh to locally strong NW winds across the central and south parts of the Gulf of California. with peak seas around 6 ft. These winds will persist through Wed. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong winds are expected in the Papagayo region through Wed night. Winds will then pulse to strong each night through the upcoming weekend. Outside of the gap winds areas, mainly light to gentle winds will prevail north of the monsoon trough while gentle to moderate S to SW winds are expected to the south. Large seas generated in the Tehuantepec region will impact the offshore waters of Guatemala and El Salvador tonight through Thu. Seas will peak 10-11 ft tonight. REMAINDER OF THE AREA... High pressure of 1029 mb is centered near 31N126W. The pressure gradient between this area of high pressure and lower pressure in the vicinity of the ITCZ is supporting fresh to locally strong trade winds north of the ITCZ to 20N and W of 120W. Seas in this area are in the 9-12 ft range in a mix of NW swell and NE-E wind waves. These general marine conditions will persist during the next 48 hours. Long period NW swell continues to propagate across the forecast region, with seas 8 ft or greater across the waters west of 100W. Another pulse of NW swell is propagating across the NW waters, with seas greater than 12 ft nw of a line from 30N126W TO 20N140W. Yet another pulse of NW swell will enter the NW waters Thu night, with seas of up to 18-19 ft near 30N140W. These successive sets of NW swell will maintain seas greater than 8 ft over much of the forecast waters west of 100W through much of the week. By Thu, the NW swell will reach the waters between Ecuador and the Galapagos Islands raising seas to 8 ft. $$ AL