000 AXPZ20 KNHC 210905 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Wed Apr 21 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. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08N78W to 09N86W to 08N100W to 06N114W. The ITCZ axis continues from 06N114W to 06N130W to 04N140W. Scattered moderate isolated strong convection is located within 90 nm south and 150 nm north of the convergence axis between 96W and 137W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge extends into the offshore waters west of Baja California, producing moderate NW to N winds across the area, and light to gentle winds in the Gulf of California. Seas are 5 to 6 ft across most of the forecast area, except 6-7 ft north of Punta Eugenia. Seas remain 1 to 3 ft in the Gulf of California. NW swell will impact the waters N of Punta Eugenia today, with seas building to 8 ft through Thu. Gulf of California: A weak cold front will push southward across the northern part of the Gulf later today. Fresh to strong S-SW winds are expected ahead of the front through tonight, with seas building to 5-7 ft in the strongest winds. Moderate to fresh southerly winds are expected over the northern Gulf Thu and Thu night, with gentle to moderate southerly winds elsewhere. Gulf of Tehunatepec: A weak low pressure in the SW Gulf of Mexico and its associated cold front will support a northerly gap wind event across the Tehuantepec region into Thu morning with seas building to 8 ft downstream of the Gulf tonight. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... High pressure building NW Caribbean will support fresh to strong winds across the Papagayo area this evening through Fri morning, with associated seas building to 8-9 ft by Thu. Light to gentle winds will prevail elsewhere through Sun. Large, long period cross-equatorial southerly swell will build seas to 8-9 ft across the waters between Ecuador and the Galapagos Islands through Thu. REMAINDER OF THE AREA... The gradient between strong high pressure well north of the forecast area and lower pressures in the vicinity of the ITCZ supports a large area of moderate to fresh trade winds from 09N to 30N W of 125W based on scatterometer data. Seas are 7 to 9 ft across this region based on altimeter data. High pressure will gradually weaken during the next 24-48 hours as a cold front approaches from the west. Northerly swell will propagate across the waters north of 28N between 120W and 132W through Thu night, and increase seas in the northern waters to 8-9 ft. Seas will subside to less than 8 ft Thu night and Fri. $$ Mundell