000 AXPZ20 KNHC 221453 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Mon Apr 22 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 1500 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A trough extends from 06N77W to 06N97W. The ITCZ continues from 06N97W to 04N115W to 05N130W to 02N140W. Scattered moderate and isolated strong convection is noted from 05N to 09N east of 80W, from 04N to 08N between 90W and 100W, and also from 04N to 10N between 108W and 114W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A broad high pressure ridge persists over the offshore waters west of Baja California. The pressure gradient between this ridge and a low pressure trough over the Gulf of California is producing moderate to fresh NW winds over the waters north of Cabo San Lazaro based on earlier scatterometer data and ship observations. NW swell associated with an old, now dissipated frontal boundary will continue impacting the northern waters today with seas up to 8 ft west of Guadalupe Island this morning. Winds and seas will subside through the rest of the week as the pressure gradient weakens over the region. Gulf of California: Moderate to fresh gap winds over the northern Gulf of California are diminishing as an old frontal boundary or trough has recently dissipated. Otherwise, light to gentle winds will prevail across the Gulf through Fri with seas generally 3 ft or less. Gulf of Tehuantepec: A weak pressure gradient over southern Mexico will result in variable, light to gentle winds across the region today through Fri. By late Fri night, fresh to strong N winds may develop over the Gulf of Tehuantepec as high pressure builds over the western Gulf of Mexico behind a cold front. 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 will continue pulsing across the Gulf through early Tue. Winds will be strongest during the overnight and early morning hours with the assistance of the nocturnal drainage flow. The pressure gradient will slacken by midweek with winds diminishing to fresh speeds by Wed, then becoming gentle to moderate for the rest of the week. Gulf of Panama: Gentle to moderate N to NE breezes will persist across the Gulf of Panama this week with seas generally running 3-5 ft in mixed SW swell and N to NE wind waves. Wave heights between Ecuador and the Galapagos Islands will remain 4-6 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 set of SW swell moves into the region. REMAINDER OF THE AREA... A high pressure ridge extends SE across the northern waters to the Revillagigedo Islands. The pressure gradient between this ridge and the ITCZ is supporting fresh trade winds south of 20N and west of 134W. Corresponding seas are running 8-10 ft in the strongest trades with the highest seas near 140W. These conditions will generally persist today as strong high pressure remains north of the area. This high will weaken Tue through Thu in response to low pressure approaching from the west. This will result in diminishing trade winds and seas subsiding below 8 ft by midweek. A set of long period NW swell associated with a weakening cold front will continue impacting the waters north of 27N and east of 129W with seas peaking between 8-10 ft this morning. Seas will subside on Tue as the pressure gradient weakens and winds diminish. Elsewhere, S to SW swell will produce seas to 8 ft generally south of the Equator and west of 110W tonight through Tue night. Looking ahead, another round of SW swell will move into the far southern waters Fri and Fri night with seas once again building to 8 ft. $$ Lewitsky