000 AXPZ20 KNHC 302123 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1943 UTC Sat Mar 30 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 1800 UTC surface analysis and satellite imagery through 2100 UTC. ...SPECIAL FEATURES... ...GULF OF TEHUANTEPEC GALE WARNING... A short duration gale- force gap wind event is expected across the Gulf of Tehuantepec late Sunday night through early Monday morning. Sea will quickly build to 8-11 feet within a few hours early on Monday. 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 07N78W to 08N83W to 06N91W. The ITCZ continues from 06N91W to 06N100W to beyond 01N140W. Scattered moderate isolated strong convection is noted from 03.5N to 06.5N between 85W and 89W. Scattered moderate convection is noted from 00N to 03N W of 135W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A surface ridge extends from high pressure center north of the area near 37N127W southeastward through 30N125W to just south of the Islas Revillagigedo at 17N110W. The pressure gradient between this ridge and lower pressure across Mexico is producing moderate to fresh NW to N winds across most of the offshore waters of Baja California. Seas across this region are in the 8 to 10 ft range in NW swell this morning. Winds will gradually diminish to around 15 kt across these waters by Sunday evening, with seas will also gradually subsiding to 6-8 ft. Winds are expected to diminish further Mon and Tue as the ridge weakens more and shifts westward, and troughing develop across the Baja peninsula. Gulf of California: Gentle to moderate NW winds prevail across the Gulf waters, with seas in the 2-4 ft range. Expect gentle winds from varying directions Mon and Tue as the pressure gradient weakens considerably and daytime heating effects dominate. Gulf of Tehuantepec: See the special features section above for more details on the upcoming gale force gap wind event. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate to fresh southeast to east trade winds will prevail from 85W westward. Gulf of Papagayo: Winds will briefly pulse to fresh to strong E across the Papagayo region during the overnight hours through early next week. These winds will increase Tue night through early Thu as high pressure builds across the W Caribbean. Gulf of Panama: Moderate to locally fresh N to NE winds prevail across the Gulf and downstream to 05N, and are expected to continue through Sun morning before beginning to diminish modestly. SW swell moving into the region and wind waves from the northerly winds will produce 6-7 ft seas through Sun morning before seas begin to subside. REMAINDER OF THE AREA... A stationary front, that is just to the NW of the area, will meander between 142W and 143W through tonight, then begin to shift slowly eastward and into the far NW waters early Mon morning. Winds behind the front will continue to generate long- period NW swell moving into the far NW waters, and produce seas of 8 to 9 feet. The front will stall and weaken Mon across the far NW portion of the area. The pressure gradient between high pressure over the northern waters, and lower pressure in the vicinity of the ITCZ, is producing an area of fresh to strong trade winds south of about 20N and from 115W westward. The ridge will weaken through tonight, with winds diminishing across the tradewind belt. $$ AL