000 AXPZ20 KNHC 040207 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 205 UTC Tue Apr 4 2017 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 0000 UTC surface analysis and satellite imagery through 0130 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The ITCZ extends from 04N95W to 00N112W, then resumes near 02N123W to beyond 04N140W. Isolated moderate convection is from 03N to 06N between 91W and 97W and from 02N to 06N between 126W and 137W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... High pressure centered northwest of the region supports moderate northwest winds offshore northern Baja California, and mainly light to gentle winds elsewhere over the Mexico offshore waters and most of the Gulf of California. The only exception are fresh to strong south to southwest winds over the northern Gulf of California associated with the tight pressure gradient between the Pacific high pressure and low pressure diving southeast over the southwestern United States. These fresh winds will continue through early Tuesday before diminishing to around 10 kt by late Tuesday morning as the low moves away from the region. Large swell of 8 to 10 ft will continue to affect the waters west of Baja California through Tuesday. Then, the swell will diminish below 8 ft Tuesday night. A round of NW swell to 8 ft will arrive on Friday off northern Baja California. Then, a larger batch of NW swell of 8 to 12 ft will reach these waters this upcoming weekend. On Thursday, a cold front will cross the Gulf of Mexico. High pressure building southward behind the cold front is expected produce strong to near gale force winds across the Gulf of Tehuantepec and the surrounding waters starting during the day Thursday. Then, winds will increase to near gale to gale force Thursday night and Friday. Winds will decrease going into Friday night as the high north of the region slides east. Then, the gap wind event is forecast to end on Saturday. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... NE to E winds will pulse to moderate the next few nights over the Gulf of Papagayo. High pressure building in the wake of a cold front over the Gulf of Mexico will cause winds funneling into the Gulf of Papagayo to freshen Thu night and Fri night. Otherwise...light to gentle winds and seas mainly between 4 to 7 ft will prevail over the forecast waters. REMAINDER OF THE AREA... The pressure gradient between high pressure centered north of the region and the equatorial trough supports moderate to fresh northeasterly trades across the waters north of the ITCZ and west of 125W. Mainly gentle to moderate winds are elsewhere. The combination of northwest swell and trade wind driven waves support seas of 8 to 11 ft north of 05N and west of 112W. This large area of seas 8 ft or greater will shift eastward through Tuesday, and become confined south of 15N between 100W and 125W by Wednesday morning, as the trades weaken slightly in response to high pressure to the north weakening. At that time, another set of northwesterly swell accompanied by a cold front will cross the northwest corner of our forecast waters, with seas of 8 to 11 ft spreading east across the waters north of 25N Wednesday through Thursday night. Yet another set of large swell will enter the northwest waters accompanied by a weakening cold front by Friday night, with seas greater than 8 ft expanding across the majority of waters north of 05N and east of 115W by Saturday night, as high pressure builds across the northern waters and fresh trades return over the southern waters. $$ LATTO