000 AXPZ20 KNHC 231512 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 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 1200 UTC surface analysis and satellite imagery through 1400 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 09N74W to low pres 1011 mb near 04N94W TO 05N100W. The ITCZ continues from 05N100W to 05.5N110W TO 09.5N116W, then resumes from 06.5N136W to beyond 06N140W. Scattered moderate to strong convection is noted from 02N TO 09.5N between 79W and 86W, and from 03N to 06N between 92W and 103W. Scattered to locally numerous moderate to strong convection is present 06N to 12N between 111W and 128W. Scattered moderate convection is also noted south of the equator from 01.5S to 04.5S between 91W and 92.5W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A broad high pressure ridge persists over the offshore waters west of Baja California, extending southeastward to near 15N104W. Overnight scatterometer data showed moderate to fresh NW winds off Baja California Sur with the strongest winds south of Cabo San Lucas. Further north, earlier altimeter data revealed 8-9 ft seas over the Baja California Norte waters as residual NW swell impacted the region. Winds and seas will subside modestly through the week as the pressure gradient weakens over the region. 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 4-6 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 diminish later this morning, then pulse to fresh over the regional waters tonight into Wed morning with the assistance of the 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 3-6 ft in S to SW swell as light to gentle winds prevail across the southern waters. By Fri, seas will build to 5- 7 ft near the Galapagos Islands as another pulse of 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 37N135W. South of the ridge, moderate to fresh trade winds prevail generally south of 20N west of 115W per overnight scatterometer data. Seas are still 8 to 9 ft within these trades west of 134W. These conditions will gradually abate later today through Thu as strong high pressure north of the region begins to weaken in response to low pressure approaching 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 25N and east of 130W is producing 8-9 ft seas. Wave heights in this region will subside below 8 ft late today 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 110W through tonight. Another round of SW swell will move into the far southern waters Fri and Fri night with seas building to 8 ft and persisting into the weekend. $$ Stripling