000 AXPZ20 KNHC 222028 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2002 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 1800 UTC surface analysis and satellite imagery through 2000 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from the Colombia/Panama border near 08N78W to 07N94W. The ITCZ extends from 07N94W to 09N112W, then resumes from 07N118W to 05N136W. Scattered moderate and isolated strong convection is noted from 04N to 08N between 82W and 89W, from 05N to 12N between 104W and 112W, from 06N to 09N between 120W and 123W, and from 03N to 09N between 127W and 138W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A 1031 mb high pressure is centered near 33N132W with a ridge extending SE to NW of the Revillagigedo Islands. 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 8 to 10 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. Elsewhere, quiescent conditions should prevail through the weekend, except south of Oaxaca, where 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. N gap winds may also develop Sun night in the Gulf of Tehuantepec. 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 offshore nocturnal winds at fresh levels are likely to 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 1031 mb high is centered near 33N132W with a ridge extending to the southeast offshore Baja California. The ridging along with several weak troughs and lower pressure along the convergence zone is supporting fresh to strong trades 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 Sun. 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. $$ KONARIK