000 AXPZ20 KNHC 140931 CCA TWDEP Corrected typo in first discussion section paragraph Tropical Weather Discussion NWS National Hurricane Center Miami FL 627 UTC Sun Apr 14 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 0900 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: The next gap wind event across the Tehuantepec region will take place tonight and Mon as a ridge builds S along the eastern slopes of the Sierra Madre mountains in Mexico behind a cold front crossing the Gulf of Mexico. Winds are forecast to abruptly increase to between 35 and 40 kt. Corresponding seas will build as high as 13 or 14 ft by early Mon. Winds and seas will diminish starting late Mon as the high pressure north of the region shifts eastward. 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 further details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 1007 mb low pressure over NW Colombia near 09N74W to 06N79W to 05.5N90W to 06.5N100W to 08.5N107.5W. The ITCZ continues from 08.5N107.5W to 09N111W to 07N120W to beyond 04.5N140W. Scattered moderate and isolated strong convection is noted from 04N to 08N between 81W and 85W, from 06N to 10N between 104W and 120W, from 04N to 06N between 130W and 133W and W of 139W from 02N to 07N. A second ITCZ reaches from 01S99W to 02S102W to 02.5S110W to 01S117W. Scattered moderate and isolated strong convection is seen within 60 nm of the second ITCZ W of 101W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge extending from 32N139W to the Revillagigedo Islands will maintain light to moderate winds over the waters W of Baja California into early next week. A cold front crossing the Gulf of Mexico will support a late season gap wind gale event across the Tehuantepec region this afternoon through Mon. For the northern Gulf of California, a trough crossing the region will introduce strong SW to W gap winds over the waters N of 30N Mon night. Farther south, a cold front entering the western Gulf of Mexico will support a late season gap wind gale event across the Tehuantepec region tonight and Mon. Please see the Special Features section for more details. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: Moderate to fresh NE to E winds will prevail across the Gulf through Mon. Then, winds will become strong Mon night through Wed as high pressure builds N of the area. Seas will peak near 8 ft during the strongest winds. Gulf of Panama: Mainly light to gentle winds will prevail across the area during the next several days. Seas will generally remain in the 3 to 5 ft range through Tue, building to between 4 and 6 ft Tue night through Wed night due to long period SW swell. Elsewhere, light to gentle winds will persist the next several days. Wave heights between Ecuador and the Galapagos Islands will generally remain in the 5 to 7 ft range in long period SW swell. REMAINDER OF THE AREA... As previously mentioned, a ridge extends across the northern forecast waters from a 1031 mb high located near 32N152W. This anticyclone continues to gradually weaken. As a result, winds have diminished to 20 kt or less over all of the waters N of 10N and W of 120W. Seas in this region range between 8 and 9 ft in residual NW swell N of 20N and primarily in NE swell S of 20N. Winds and seas in the trade wind belt will continue to diminish through Mon as the high weakens further and retreats farther W. Cross equatorial SW swell are decaying but will remain just high enough to maintain seas around 8 ft generally S of 02S between 105W and 120W today. The swell will decay further and allow seas in this area to subside below 8 ft by tonight. $$ CAM