000 AXPZ20 KNHC 020311 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Fri Apr 2 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 0300 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Recent scatterometer data shows gale-force winds across the Gulf of Tehuantepec, with winds to 40 kt. Winds are expected to increase to near 45 kt by early Fri, and continue into Sun. Wave heights will build to 12-17 ft overnight, and remain high into Sun. Swell generated by this event will spread well to the southwest and west of the Gulf of Tehuantepec region through the weekend. Mariners navigating through these waters are urged to use caution due to hazardous marine conditions. Please read the latest HIGH SEAS FORECAST- https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. Volcanic Ash Advisory: Pacaya Volcano in southern Guatemala near 14.4N 90.6W is erupting, producing a plume of volcanic ash spreading out across the offshore waters of Guatemala. The ash may reaching the ocean surface, and may cause reduced visibility to some extent. While there have been no reports of volcanic ash reaching the surface or reduced visibilities, mariners are still urged to exercise caution. Report observations to the National Hurricane Center by calling 305-229-4425. Please read the latest HIGH SEAS FORECAST- https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details on both the Gale Warning and on the Volcanic Ash Advisory. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A trough extends from 09N84W to 06N90W. The ITCZ continues from 06N90W to 05N96W to 06N116W to 04N132W to 05N140W. Scattered moderate to strong convection is noted from 03N to 08N between 84W and 94W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see the Special Features section above for details on a gale-force wind event in the Gulf of Tehuantepec region. Gentle to moderate winds continue across the Mexican offshore waters north of 20N. Seas are 3 to 5 ft north of 20N, except 5 to 7 ft in NW swell off Baja California Norte. South of 20N, seas are 5 to 7 ft in SW swell. High pressure building west of Baja California will support fresh NW winds off Baja California Norte this weekend. Gentle to moderate NW winds will persist elsewhere across the Mexican offshore waters outside of the Tehuantepec region. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Please see the Special Features section above for details on a Volcanic Ash Advisory in effect for Pacaya Volcano in southern Guatemala. Fresh to strong northeast to east winds are occurring across the Gulf of Papagayo area due to high pressure building to the north of the area. Seas are 8 to 10 ft in the plume of highest winds, with a component of longer-period SW swell. Fresh N gap winds are across the Gulf of Panama, with 5 to 7 ft seas. Light to gentle winds continue elsewhere over the Central American offshore waters with 3-5 ft wave heights. Fresh to strong offshore gap winds will continue across Gulf of Papagayo region through Sun night. Seas will build from northern Costa Rica to Guatemala, due to NE and E swell generated from the Papagayo and Tehuantepec gap wind areas mixing with long period SW swell. REMAINDER OF THE AREA... Moderate trade winds prevail across most of the area. Seas are 6 to 8 ft across the deep tropics in mixed swell. Lighter winds and lower seas exist across the subtropics, where the pressure gradient is more relaxed. Little change is expected during the next couple of days. The models show a low pressure system moving across the far northwestern waters late this weekend, which could increase winds and seas there. $$ Mundell