000 AXPZ20 KNHC 152147 CCA TWDEP Tropical Weather Discussion...Corrected NWS National Hurricane Center Miami FL 1605 UTC Sat Apr 15 2023 Corrected Special Features section Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 1200 UTC surface analysis and satellite imagery through 1545 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: High pressure north of the area building in behind a cold front that will move across the Gulf of Mexico will create a tight enough gradient that is expected to support northerly gale-force winds through the Gulf of Tehuantepec Mon morning. This will be a short-lived event as the high pressure north of the area will shift eastward during Mon allowing for the winds to diminish to strong speeds. Seas are expected to build to near 12 ft with this event before subsiding to below 12 ft Mon afternoon. Please refer to latest High Seas Forecast issued by National Hurricane Center at website: https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from low pressure of 1010 mb over NW Colombia near 10N75W southwestward to 07N90W to 07N103W and to 08N115W, where it transitions to the ITCZ and continues to 06N127W and to beyond 05N140W. Scattered moderate to strong convection is seen from 01N to 06N between 90W-95W. Scattered moderate convection is from 01N to 06N between 80W-86W and within 120 nm north of the trough between 110W-114W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please refer to the Special Features section above for details on an upcoming Gulf of Tehuantepec gap wind gale event. A broad surface ridge extends from high pressure NW of the area to SW of Cabo Corrientes along 108W. The associated pressure gradient is producing moderate to locally fresh northerly winds across the full length of Baja California waters extending southward to offshore Cabo Corrientes and adjacent area. Localized areas of strong winds are likely near shore of Cabo San Lucas and along the coast from Cabo Corrientes to Lazaro Cardenas. Seas offshore Baja California have subsided to 6-9 ft in NW swell north of Punta Eugenia and to 5-8 ft south of Punta Eugenia. Elsewhere from the Tehuantepec region to near Acapulco, gentle to moderate west to northwest winds prevail along with seas of 3-5 ft. For the forecast, the NW swell across the Baja offshore waters will continue to subside through tonight. Gentle S to SW winds over the northern Gulf of California will briefly become fresh S to SW winds Mon night. NW to N winds are expected to increase to fresh to strong N of Punta Eugenia starting Mon night, becoming fresh to strong Wed and Wed night as the high pressure shifts eastward. The next gap wind event in the Tehuantepec region is expected to begin Sun night, with brief gale-force winds expected Mon morning. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR Fresh to locally strong winds prevail across the Gulf of Papagayo region tonight, extending offshore to 88W, where seas are 5-7 ft. Fresh N to NE winds are across the Gulf of Panama and extend south to near 06N, with seas of 4-5 ft. Elsewhere, light to gentle variable winds and slight seas prevail. For the forecast, weak high pressure is expected to persist across the region to the N through Sun night. This pattern will produce fresh easterly winds in the Gulf of Papagayo pulsing to strong at night and into the early morning hours through Wed night. However, seas are expected to remain below 8 ft. Moderate to fresh N to NE winds are expected in the Gulf of Panama through tonight, and will return again Tue night and Wed night. Elsewhere, light to gentle variable winds and moderate seas in SW swell will prevail. ...REMAINDER OF THE AREA... A weakening 1023 mb high pressure well N of the area near 34N140W extends a ridge southeastward to offshore of Cabo Corrientes, Mexico. The ridge dominates most of the forecast waters north of 10N and west of about 110W. Overnight ASCAT data over this area showed gentle to moderate NE to E winds, with an area of fresh E winds located from 12N to 19N W of 130W. Seas within the area of gentle to moderate winds are 5-7 ft, and seas within the area of fresh winds are 6-8 ft in mixed N to NE swell. In the NE part of the area, seas of 7-9 ft due to NW swell continue tonight N of 18N and west of the Baja California Peninsula to 131W. Light to gentle winds are present south of the ITCZ. For the forecast, high pressure will dominate the northern forecast waters over the next several days. The associated pressure gradient will support moderate to fresh trade winds over the west-central waters. The NW swell over the NE part of the area will subside through Sat allowing for seas to fall below 8 ft. An elongated zone of seas 8 to 9 ft in mixed N and E swell is expected to develop W of 114W from 08N to 16N tonight through Sun night, where trade winds will freshen, then increasing to 8-10 ft Mon. $$ Aguirre