000 AXPZ20 KNHC 211604 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1519 UTC Tue Apr 21 2020 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 1200 UTC surface analysis and satellite imagery through 1530 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 07N78W to 07N85W, then transitions to the ITCZ to 09N98W. From 09N98W to 05N115W a surface trough is depicted. The ITCZ resumes from 04N120W to 05N131W, then continues again from 04N137W to beyond 03N140W. Widely scattered moderate convection is occurring from 05N to 12N between 95W and 110W and from 10N to 13N between 113W and 118W. Scattered moderate convection is also noted from 04N to 10N between 128W and 135W. Finally, scattered moderate isolated strong convection is observed from 03N to 05N west of 138W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A 1028 mb high is centered near 33N130W with a ridge extending to the southeast to 30N125W to 15N100W. This pressure combined with troughing along the Gulf of California is likely supporting fresh to strong NW winds west of the Baja California peninsula, though no observations have been available this morning. Elsewhere winds are moderate breeze or weaker across the Mexican offshore zones. An overnight altimeter pass indicated seas up to 7 ft this morning west of the peninsula, mainly due to the NW winds. The fresh to strong NW winds west of the Baja California peninsula will remain through Wed before winds diminish. Large NW swell will begin affecting the waters offshore of Baja California this afternoon through Sat. Elsewhere, quiescent conditions should prevail through at least Sat night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... A weak pressure pattern is resulting in winds along the Central American and equatorial waters to be gentle breeze or weaker currently. An altimeter pass overnight indicated peak seas near 6 ft in the Gulf of Tehuantepec, mainly from long-period SW swell. The weak pressure pattern should continue to provide tranquil conditions through at least Sat night. No significant long- period swell is expected through the next several days. REMAINDER OF THE AREA... A 1028 mb high is centered near 33N130W with a ridge extending to the southeast to 30N125W to 15N100W. The somewhat weak pressure gradient south of the ridge to the ITCZ is producing moderate to fresh NE trades this morning. An overnight altimeter pass indicates seas of 8 to 9 ft between 08N and 22N along 130W, due to NE wind waves and NW swell. A weak 1009 mb low is centered near 07N105W along the surface trough. The high is anticipated to weaken some by Fri, leading even lighter NE trades on Fri and Sat. However, continued long-period NW swell should cause combined seas to be 8-10 ft generally north of 10N and west of 120W for the next several days. The weak low is anticipated to slowly pull northwestward with little amplification, as shown by most global model guidance. A combination of S swell and SE wind waves may product combined seas up to 8 ft along the equatorial waters west of 100W on Fri and Sat. $$ Landsea