000 AXPZ20 KNHC 290943 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Mon Apr 29 2019 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 0845 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A trough extends from 07N81W to 05N91W. The ITCZ continues from 05N91W to 05N110W TO 06N124W, then resumes from 05N126W to 03N134W to beyond 02N140W. Numerous to scattered moderate isolated strong convection from 01N to 07N between 120W and 139W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... High pressure extends SE to just west of the Revillagigedo Islands. A deep layered upper level low pressure system supports a surface trough that extends from 30N121W to 26N125W. The pressure gradient on the eastern periphery of the ridge is maintaining gentle to moderate NW to N winds over the offshore waters of Baja California with seas in the range of 4-5 ft in northerly swell. With the exception of winds briefly becoming fresh along and just offshore the central part of the Baja California Peninsula during the afternoons and at night, expect near steady state conditions through Fri night. Light to gentle NW to W winds prevail across the offshore waters between Las Tres Marias and Puerto Angel with seas generally in the 4-5 ft in mixed SW and NW swell. Little change in overall conditions are expected through Fri, with afternoon winds turning more onshore and increasing to around 15 kt each day. Gulf of California: Fresh to strong S to SW winds across far north portions of the Gulf will prevail through early Tue as a weakening surface trough moves across the area. Winds will diminish to fresh around 1200 UTC Tue then become generally light to moderate Tue afternoon through Wed afternoon. Seas over the northern part of the Gulf during the peak winds will build to 5-7 ft today, then subside to 2 to 4 ft on Tue as winds diminish. Gulf of Tehuantepec: Light to moderate onshore winds and seas ranging between 4 and 6 ft are expected for the Gulf of Tehuantepec through Fri night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: Fresh to strong NE to E winds over the Gulf of Papagayo region will diminish to fresh Wed night. Gulf of Panama: Fresh N winds over the Gulf of Panama will become light to moderate Tue afternoon. Seas in this area will be maintained in the 3-5 ft range as a result of the long-period S to SW swell originating from the Southern Hemisphere. Seas between Ecuador and the Galapagos Islands range between 4-6 ft in S to SW swell. This S to SW swell will maintain combined seas near current heights through Wed, then seas will subside slightly Wed night through Thu night. GOES-16 satellite images continue to show a widespread area of haze, some of it dense, along and adjacent to the coast of Central America and the coast of SE Mexico, including the Gulf of Tehuantepec region. Ongoing agricultural burning, as normally carried on during this time of year in SE Mexico and in Central America, is generating smoke leading to hazy conditions. REMAINDER OF THE AREA... Moderate to fresh NE to E trades prevail over the waters from about 05N to 20N W of 120W. NW and SW swell will help maintain combined seas in the range of 6 to 8 ft for that region. Rather weak high pressure ridging over the northern waters will generally maintain moderate trades across the trade wind belt through early next week, with little change in combined seas expected. N swell producing seas of 8 ft will cross 32N between 124W and 132W today and propagate southward to near 27N between 121W and 133W this evening, before diminishing on Tue. Cross-equatorial SW swell will propagate NE through much of the forecast area east of 120W Thu afternoon through Sat. Combined seas of 8 ft or higher will generally be confined to the waters south of the 02S and west of 95W. $$ NR