000 AXPZ20 KNHC 212157 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2136 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 1800 UTC surface analysis and satellite imagery through 2130 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N78W to 07N83W, then transitions to the ITCZ to 09N101W. From 10N104W to 05N114W a surface trough is depicted with a 1010 mb low at 09N106W. The ITCZ resumes from 05N121W to 06N132W, then brakes for a trough from 02N137W to 07N134W, then continues again from 04N136W to beyond 03N140W. Scattered moderate convection is occurring from 05N to 08N between 80W and 95W. Widely scattered moderate convection is occurring from 08N to 12N between 10W and 122W. Scattered moderate convection is occurring from 03N to 08N between 128W and 138W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A 1030 mb high is centered near 33N130W with a ridge extending to the southeast to 30N123W to 18N108W. This ridge combined with troughing along the Gulf of California is supporting fresh to strong NW winds west of the Baja California peninsula, as observed from a scatterometer pass this afternoon. Elsewhere winds are moderate breeze or weaker across the Mexican offshore zones. An altimeter pass this morning indicated seas up to 8 ft west of Baja California Sur, mainly due to the NW winds. The fresh to strong NW winds west of the Baja California peninsula will remain through tomorrow before winds diminish. Large NW swell are affecting the waters offshore of Baja California through Sat. Elsewhere, quiescent conditions should prevail through at least Sun 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 this morning 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 Sun night. No significant long- period swell is expected through the next several days. REMAINDER OF THE AREA... A 1030 mb high is centered near 33N130W with a ridge extending to the southeast to 30N123W to 18N108W. The somewhat weak pressure gradient south of the ridge to the ITCZ is producing moderate to fresh NE trades, as observed from scatterometer this morning. An altimeter pass this morning indicated seas of 8 to 9 ft between 10N and 22N along 140W, due to NE wind waves and NW swell. A weak 1009 mb low is centered near 08N106W along a surface trough. The high is anticipated to weaken some by Fri, leading to 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