306 AXPZ20 KNHC 011641 CCA TWDEP Tropical Weather Discussion...CORRECTION NWS National Hurricane Center Miami FL 1605 UTC Mon Apr 1 2019 CORRECTED SPECIAL FEATURE SECTION 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 1200 UTC surface analysis and satellite imagery through 1500 UTC. ...SPECIAL FEATURES... ...Gulf of Tehuantepec Gale Warning...Scatterometer data from 01/0400 UTC were showing near gale force winds in the Gulf of Tehuantepec. Strong high pressure has been building southward into eastern Mexico, behind a Gulf of Mexico cold front. Gale- force winds are forecast until 01/1800 UTC. The sea heights will range from 9 feet to 11 feet until this afternoon. The wind speeds will slow down after 01/1800 UTC, to fresh to strong. The sea heights will subside to a range from 8 feet to 9 feet. Expect little change in wind and sea conditions until Wednesday morning. Please read the latest High Seas Forecast issued by the National Hurricane Center under AWIPS/WMO headers FZPN03 KNHC/HSFEP2 or at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough passes through the coast of Colombia near 06N77W to 05N90W. The ITCZ continues from 05N90W to 05N110W beyond 01N140W. Scattered moderate to strong rainshowers are: from 04N to 08N between 83W and 87W, from 02N to 04N between 121W and 124W...and from 03N to 05N between 131W and 136W. Scattered moderate to isolated strong rainshowers are: within 90 NM N of the ITCZ between 125W and 131W, and within 60 NM S of the ITCZ between 127W and 130W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A surface ridge extends from a 1021 mb high pressure center that is near 27N133W to 19N126W to 16N117W. The surface pressure gradient between the ridge and lower pressure over Mexico is producing moderate NW winds west of Baja California. The sea heights generally have subsided to less than 8 feet based on recent altimeter data. A weakening cold front will approach the waters off Baja California Norte on Tuesday night. Light to moderate winds will prevail off Baja California through midweek. Fresh winds are expected on Friday and Friday night, as a stronger ridge builds to the west of the region. Gulf of California: The most recent scatterometer data were indicating moderate to fresh NW winds in the central Gulf of California, and light to moderate winds elsewhere. The wind speeds will diminish to 15 knots or less across the region later today as the pressure gradient weakens. Fresh to strong S-to-SW gap winds are expected in the northern Gulf of California, N of 29.5N, on Tuesday night, ahead of a weakening cold front that will approach Baja California Norte. Gulf of Tehuantepec: Please read the Special Features section for more details about the current the gale-force wind warning. Northerly gap winds will pulse to 20 to 25 knots through Wednesday morning, and then diminish to gentle speeds from Wednesday night through Friday night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: Fresth-to-strong winds will pulse across the Papagayo region during the overnight and early morning hours through Thursday. Fresh winds will prevail from Thursday night through Friday night. Gulf of Panama: Generally light to moderate winds will prevail across and downstream of the Gulf of Panama through Wednesday. High pressure will build north of the area beginning on Tuesday night. Moderate to fresh NE winds will persist in the Gulf through Thursday. Light to gentle winds will prevail elsewhere through the week. The sea heights will subside gradually as the SW swell decays across the area. REMAINDER OF THE AREA... A cold front over the far NW portion will cross the northern waters through tonight, then weaken Tue and Tue night as it approaches the offshore waters off Baja California Norte. Expect 8-9 ft seas in NW swell over the far NW waters today as shown by recent altimeter data west of 138W. Elsewhere, moderate to fresh trade winds prevail south of 20N and west of 125W based on recent scatterometer data. Peak seas are likely still 10-11 ft in this region given that earlier altimeter retrievals were higher than available wave guidance. High pressure will weaken over the northern waters during the next couple days, resulting in weakening trades and subsiding seas over the high seas domain. Low pressure will develop just north of the area Wed and pull another cold front across the northern waters Wed night into Thu. A significant NW swell event will impact the northern waters by late week as stronger low pressure tracks well north of the region. Seas will build to 12-18 ft across the NW portion by Fri night. $$ mt