000 AXPZ20 KNHC 020900 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 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 0600 UTC surface analysis and satellite imagery through 0900 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Recent scatterometer data shows gale-force winds across the Gulf of Tehuantepec, with winds to 45 kt. Winds are expected to remain 30 to 40 kt through Sun morning. Wave heights will remain 12 to 17 ft into Sat. Swell generated by this event will spread well to the west-southwest 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 into the coastal 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 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 10N84W to 05N93W. The ITCZ continues from 05N93W to 06N115W to 04N130W to 06N140W. Scattered moderate to strong convection is noted from 03N to 06N between 88W and 96W. scattered moderate isolated strong convection is within 30 nm of the ITCZ axis between 99W and 105W. 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. Scatterometer data shows gentle to moderate winds across the Mexican offshore waters between 99W and 119W. Seas are 5 to 6 ft in mixed SW and NW 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. Scatterometer data shows a small area of fresh to winds near the Gulf of Papagayo, and light to gentle winds elsewhere. Seas are 7-8 ft in the Papagayo region, and 5 to 7 ft elsewhere. 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... Scatterometer data shows a narrow band of fresh easterly winds from 06N to 07N between 93W and 99W. Seas are estimated to be 8 ft in this area. Moderate to fresh trade winds are noted from 08N to 19N west of 115W, with 7 to 8 ft seas. Lighter winds and lower seas exist across the rest of the subtropics. Little change is expected during the next couple of days for most of the forecast area. The only exception will be in the far NW waters, where a low pressure system tracking eastward along 33N will drag a weak cold front into the area. Seas associated with the low and front will increase to 8-11 ft Sun through Mon. $$ Mundell