000 AXPZ20 KNHC 230229 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Thu Apr 23 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 0000 UTC surface analysis and satellite imagery through 0200 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from the Colombia/Panama border near 08N78W to 06N86W to 09N100W. Another surface trough extends from 13N103W to 06N117W. A third surface trough extends from 08N124W to 02N130W, with another extending from 08N135W to 02N140W. Scattered moderate and isolated strong convection is noted from 04N to 09N between 82W and 91W, and from 05N to 15N between 103W and 113W. Scattered moderate convection is noted from 05N to 11N between 113W and 120W, and from 03N to 10N between 124W and 138W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A 1032 mb high pressure is centered near 33N133W with a ridge extending SE to across the Revillagigedo Islands, terminating near Cabo Corrientes. The gradient between this ridge and a modest low pressure trough over the Gulf of California is supporting fresh NW winds to the west of Baja California this afternoon. Elsewhere winds are moderate breeze or weaker across the Mexican offshore zones. Seas are 7 to 9 ft west of Baja California due to the aforementioned winds as well as decaying NW long period swell. The fresh NW winds W of Baja California will decrease to moderate tonight, then diminish further Tue and Fri. Large NW swell will effect the waters offshore Baja California Norte through Sat. For the waters just south of Oaxaca, nearshore W winds of moderate to fresh will develop tonight and continue into Thu night due to the influence of low pressure over interior Mexico. A pulse of fresh to strong northerly winds is possible in the Tehuantepec region Sun night into Mon. Elsewhere, quiescent conditions should prevail through the next several days. 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 the weekend, except in the Papagayo region where fresh offshore nocturnal winds are likely Sat night, and fresh to strong Sun night and Mon 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 pressure is centered near 33N133W with a ridge extending SE to across the Revillagigedo Islands, terminating near Cabo Corrientes. The ridging along with several weak troughs and lower pressure along the convergence zone is supporting fresh to strong trades from 11N to 20N west of 130W, with moderate to fresh trades elsewhere from 09N to 25N west of 120W along with seas of 8 to 10 ft. The high is anticipated to weaken some by Fri, leading to lighter NE trades on Fri through Mon. However, continued long- period NW swell should cause combined seas to be 8 to 10 ft generally north of 12N and west of 122W into the weekend. Weak low pressure may form in the vicinity of 12N112W tonight or Thu, then meander slowly N or W into the weekend. This low may serve as a focus for showers and thunderstorms, with some locally gusty winds associated with them. A combination of S swell and SE wind waves will likely produce combined seas up to 8 ft along the equatorial waters west of 100W on Fri and Sat. $$ Lewitsky