000 AXPZ20 KNHC 202155 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2009 UTC Sat Apr 20 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 2040 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A trough extends from 08.5N84W to 07N98W. The ITCZ continues from 07N98W TO 06.5N103W TO 08.5N111W to beyond 04.5N140W. Scattered moderate and isolated strong convection is noted from 03N to 10N between 80W and 88W, within 60 nm of a line from 02N104W to 09N110W and within 90 nm of the ITCZ W of 115W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A broad ridge continues to reside over the offshore forecast waters of Baja California, while a surface trough still runs along the length of the Baja California peninsula this morning. The ridge is currently being weakened by a cold front reaching from 32N123W to 28.5N128W. The pressure gradient between the high and troughing over Baja supports moderate to locally fresh NW winds N of Punta Eugenia and gentle to moderate winds between Cabo San Lucas and Punta Eugenia. Seas are currently running between 5 and 7 ft. Moderate to fresh NW winds will continue to affect the waters N of Punta Eugenia, with seas building to around 8 ft in NW swell in the far northern waters Sun through Mon night. Elsewhere, mainly gentle to moderate NW to N winds and seas of 5 to 7 ft are expected through Wed night. Gulf of California: Winds will briefly increase across the northern part of the Gulf this evening. At that time, expect SW to W winds of 20 to 25 kt and seas building to as high as 5 ft between 29.5N and 30.5N. Otherwise, light to gentle winds can be expected through Wed. Gulf of Tehuantepec: Winds have diminished to near gale force this afternoon. Seas generated by these winds are producing an area of 8 ft or greater wave heights that extends SW from the Gulf to near 09N100W. Winds are forecast to further diminish to 20 to 25 kt by Sun morning, and then become variable at 15 kt or less Sun night through the early part of the coming week. 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 are forecast across the Gulf of Papagayo and downwind to near 90W tonight through Mon night, with seas building to 7-8 ft. Winds will be strongest during the overnight and early morning hours with the assistance of the nocturnal drainage flow. Moderate to fresh winds are expected the remainder of the forecast period with seas below 8 ft. Gulf of Panama: Moderate to fresh northerly winds will briefly affect the Gulf of Panama Sun night through Mon night, then mainly gentle to moderate northerly winds will generally prevail across this area, with seas in the 3 to 5 ft range in long period SW swell. Light to gentle winds will dominate the remainder of the offshore forecast waters, with seas of 4 to 5 ft. REMAINDER OF THE AREA... A ridge extends SE across the forecast waters from a 1030 mb high pressure located near 35N137W to near the Revillagigedo Islands. The pressure gradient between the ridge and lower pressure in the vicinity of the ITCZ is supporting an area of fresh to strong trade winds covering the waters from the ITCZ northward to about 20N and W of 120W. The high will remain near its current location and weaken Tue through Thu in response to low pressure approaching from the west. This will allow the area of fresh to strong winds and seas of 8 ft or higher to retreat to the W of 140W by Tue night. $$ CAM