000 AXPZ20 KNHC 232118 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2032 UTC Tue Apr 23 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. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N85W to 06N88W to low pres 1011 mb near 05N92W. The ITCZ continues from 05N92W to 05N100W to 04N98W TO 07.5N116.5W, then resumes from 08N118W to 04N127W to 05N135W to 06N140W. Scattered moderate and isolated strong convection is seen within an area bounded by 09N84W to 05N79W to 03N86W to 05N93W to 09N84W and from 08N to 12N between 121W and 126W. A surface trough that splits the ITCZ stretches from 03N118W to 09N117W. Scattered moderate and isolated strong convection is present from 05N to 13N between 111W and 120W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A broad high pressure ridge remains in place over the offshore waters west of Baja California. The ridge extends SE from 32N135W to near 14N108W. Scatterometer data from around 18Z showed moderate to fresh NW winds over the waters W of Baja California Sur with the strongest winds SW of Cabo San Lucas. Farther north, winds W of Baja California Norte were generally moderate. Residual NW swell W of Baja California Norte continue to decay. Winds and seas will gradually subside through the week as high pressure N of the region weakens. Gulf of California: Light to moderate winds of varying direction will prevail across the Gulf through Sat with seas generally 3 ft or less. Elsewhere, gentle to moderate NW to W winds will persist across the waters from Cabo Corrientes to Puerto Angel for the next few days, with seas generally running between 4 and 6 ft. Gulf of Tehuantepec: A weak pressure gradient over southern Mexico will result in generally onshore light to gentle winds across the region through Thu night. Strong N gap winds are expected over the Gulf of Tehuantepec late Fri into Sat as high pressure builds over eastern Mexico behind a cold front moving across the Gulf of Mexico. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: Fresh to strong NE to E winds across the Gulf of Papagayo will pulse to fresh over the regional waters tonight and Wed morning with the assistance of nocturnal drainage flow. Looking ahead, a weakening pressure gradient will allow winds to diminish to gentle Wed night through Sat night. Gulf of Panama: Moderate N to NE winds will persist across the Gulf of Panama through Thu with seas generally 3-5 ft in mixed SW swell and N to NE wind waves. Winds will become light later in the week as the pressure gradient slackens over the region. Wave heights between Ecuador and the Galapagos Islands will remain between 3 and 6 ft in S to SW swell as light to gentle winds prevail across the southern waters. By Fri, seas will build to between 5 and 7 ft near the Galapagos Islands as a modest pulse of Southern Hemisphere S to SW swell moves into the region. REMAINDER OF THE AREA... A broad high pressure ridge extends across the northern waters, centered on a 1029 mb high near 35N137W. South of the ridge, moderate to fresh trade winds prevail generally south of 20N and west of 115W per scatterometer data received this afternoon. Seas are still hovering around 8 ft within these trades west of 138W. These conditions will gradually abate later today through Thu as strong high pressure north of the region continues weakening in response to low pressure arriving from the west. Seas will subside below 8 ft in this region by Wed morning. Residual long period NW swell over the waters north of 29N and east of 128W is producing 8 ft seas. Wave heights in this region will subside below 8 ft this evening as the lingering swell decays and winds remain gentle to moderate. Elsewhere, S to SW swell will produce seas to 8 ft generally south of the Equator and west of 115W until around midday Wed. Another round of SW swell will move into the far southern waters Thu night with seas building to 8 ft. The 8 ft seas in this area will then persist until early next week. $$ CAM