000 AXPZ20 KNHC 220825 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Wed Apr 22 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 0600 UTC surface analysis and satellite imagery through 0830 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from the Colombia/Panama border near 08N78W to 08N90W to 09N99W. Another surface trough extends from 13N108W to 07N110W. The ITCZ extends from 08N111W to 05N130W, then resumes from 05N134W to 05N140W. Scattered moderate and isolated strong convection is noted from 05N to 08N between 82W and 87W, from 05N to 08N between 105W and 109W, from 08N to 14N between 106W and 112W, from 03N to 05N between 120W and 122W, from 10N to 13N between 120W and 124W, from 05N to 08N between 124W and 131W, and from 01N to 05N between 134W and 140W. Scattered moderate convection is noted from 04N to 10N between 90W and 95W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A 1032 mb high is centered near 33N131W with a ridge extending to the southeast to 30N123W to 19N108W. This ridge combined with weak troughing along the Gulf of California is supporting fresh to strong NW winds west of the Baja California peninsula, as observed from recent scatterometer passes. Elsewhere winds are moderate breeze or weaker across the Mexican offshore zones. Seas are likely up to 8 to 10 ft west of Baja California Sur, due to the NW winds along with background long period NW swell. The fresh to strong NW winds west of the Baja California peninsula will remain through today 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, except in the Tehuantepec region where northerly winds may develop at moderate to fresh levels Sun night due to a locally tight pressure gradient. 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. Seas are mainly 4 to 6 ft in a mix of long period southern hemisphere southerly swell and northwesterly swell, except slightly higher seas up to 7 ft south of the Galapagos. The weak pressure pattern should continue to provide tranquil conditions through at least Sun night, except in the Papagayo region where offshore nocturnal winds at moderate to fresh levels may develop Sat night and Sun night due to a locally tight pressure gradient. No significant long-period swell is expected through the next several days. REMAINDER OF THE AREA... A 1032 mb high is centered near 33N131W with a ridge extending to the southeast to 30N123W to 19N108W. The ridging along with several weak troughs and lower pressure along the convergence zone is supported fresh to strong trades from 10N to 24N west of 120W or so. Recent altimeter data showed 8 to 10 ft seas in this same area in a mix of NE wind waves and long period NW swell. A weak low that was previously centered near 08N106W yesterday afternoon has completely opened up per scatterometer data. Recent altimeter data showed seas around 8 ft in the vicinity mainly due to long period southerly swell and NW swell, along with moderate to fresh winds. The high is anticipated to weaken some by Fri, leading to lighter NE trades on Fri through Sun. However, continued long- period NW swell should cause combined seas to be 8 to 10 ft generally north of 10N and west of 120W for the next several days. The weak low that has troughed out near 08N106W may reform somewhat and 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. $$ Lewitsky