000 AXPZ20 KNHC 060944 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Sat Apr 6 2024 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0600 UTC surface analysis and satellite imagery through 0950 UTC. ...SPECIAL FEATURES... Significant northerly swell event: Extensive large NW swell will continue to move E of 130W reaching as far south as 20N this morning, with maximum wave heights near 13 ft and wave periods of 10-13 seconds to the NW of Guadalupe Island off Baja California Norte. The combination of shorter period wind waves due to fresh to strong NW winds combined with the longer period NW swell may present hazardous marine conditions to some vessels. Refer to your local national weather service for more details on the potential for rough surf conditions along the coast. Please read the latest High Seas Forecast issued by the National Hurricane Center under AWIPS/WMO headers FZPN03 KNHC/HSFEP2 or at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details on this significant northerly swell event. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N78W to 06N86W. The ITCZ continues from 06N89W to 06N110W to 05N124W, and from 03N133W to beyond 03N140W. A surface trough breaking the ITCZ and extending from 02N131W to 07N126W is generating scattered moderate isolated strong convection from 00N to 05N between 124W and 138W, and from 06N to 11N between 112W and 124W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please refer to the Special Features section for details on an ongoing significant northerly swell event. A cold front extends across the central Gulf of California and Baja California Sur SW to 25N113W. Fresh to near gale-force W to NW gap winds are over the northern Gulf of California N of 27N behind the front, where seas are estimated to be as high as 8 ft. Recent scatterometer data confirm these winds. Fresh to strong NW winds also follow the front off the Baja California Peninsula, N of Cabo San Lazaro, while moderate to fresh NW winds ahead of the front have reached Cabo San Lucas adjacent waters. Large combined seas of 8 to 13 ft follow the front, in a combination of wind waves with longer period NW swell. Light to gentle breezes are ongoing elsewhere, except for moderate NW winds over the adjacent waters between Jalisco and Colima. Seas are 3-5 ft across these remainder Mexican offshore waters. For the forecast, expect fresh to near gale-force W to NW gap winds across the northern Gulf of California through later this morning associated with the passage of the cold front moving through Baja California Sur. Fresh to strong NW winds will filter in behind the front over the central and southern Gulf of California today with fresh to strong NW to N winds developing near shore from Cabo San Lazaro northward through the weekend. Very large NW swell is expected to accompany the front off Baja California, reaching the Revillagigedo Islands by tonight, before gradually subsiding into Sun. Meanwhile, a reinforcing set of NW swell may impact the Baja California waters north of Punta Eugenia Mon and Tue, before subsiding through midweek. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR Moderate to fresh NE to E winds are ongoing in the region of Papagayo with 4 ft seas while a short plume of moderate N to NE winds are occuring in the Gulf of Panama. Light to gentle variable winds are elsewhere across the Central America offshore waters as well as the offshore waters between Ecuador and the Galapagos Islands. Seas over these waters are 3 to 6 ft due to mixed SW and NW swell, peak seas being S of the Galapagos Islands. Light smoke from agricultural fires has been noticed over coastal areas for the past several days. For the forecast, winds should remain tranquil for the next several days over the Central America and equatorial Pacific waters, except for pulsing moderate to fresh winds in the Papagayo region through midweek. Seas to 6 ft in SW swell from offshore Ecuador to the Galapagos Islands will spread northward to the Costa Rica and Panama offshore waters through Wed when seas will start to subside. ...REMAINDER OF THE AREA... Please refer to the Special Features section for details on an ongoing significant northerly swell event. A cold front extends across the central Gulf of California and Baja California Sur SW to 25N113W. Moderate to fresh NE winds follow the front W of the Baja California Peninsula offshore waters border. Large combined seas of 8 to 13 ft also follow the front, in a combination of wind waves with longer period NW swell. These winds and seas extends as far south as 21N and to 131W. A wide area of fresh to strong NE to E winds are from 05N to 23N and W of 120W with 8-11 ft seas in mixed N and NE swell. Gentle to moderate winds and 4 to 7 ft seas are noted elsewhere. For the forecast, the cold front will sweep southward through today while its western segment begins to weaken. As mentioned above, an extensive set of very large NW swell will continue to propagate SE through the northern waters through today, reinforcing an area of 8 to 12 ft combined seas from 05N to 23N west of 120W. The swell will gradually decay through the early part of the week, leaving an area of 8 to 10 ft combined seas in the trade wind belt from 05N to 15N west of 120W by midweek. $$ Ramos