846 AXPZ20 KNHC 280850 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Sat Dec 28 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 0830 UTC. ...SPECIAL FEATURES... Significant NW swell: A set of large NW swell has been generated from a hurricane force low over the central Pacific. Seas 12 ft or greater from this swell has moved into the NW discussion waters, with highest seas of 14 ft are noted N of 25N and W of 135W. These seas will continue to spread across the area through the weekend. Please see the latest NWS High Seas Forecast issued by the National Hurricane Center at website: https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N86W to 05N112W. The ITCZ extends from 05N112W to beyond 02N140W. Scattered moderate convection is noted from 05N to 12N and E of 90W, and from 03N to 13N between 111W and 135W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please refer to the Special Features Section above for details on the significant NW swell that will impact the waters offshore Baja California through the upcoming weekend. A surface ridge extends from a 1028 mb high pressure centered near 30N132W to the Revillagigedo Islands. The pressure gradient between this high pressure and lower pressure over the Baja California peninsula is supporting fresh to strong NW-N winds offshore Baja California Norte, mainly N of Punta Eugenia. Moderate to fresh NW winds prevail S of Punta Eugenia. Gentle to moderate winds prevail across the remainder of the offshore waters of Mexico. Light to gentle winds are in the Gulf of California. Seas are mainly 8 ft or greater across the offshore waters N of 20N and W of 110W, and 5 to 7 ft elsewhere E of 105W. Seas are 3 ft or less in the Gulf of California. For the forecast, high pressure west of the area will maintain moderate northerly winds pulsing to fresh from Cabo San Lazaro northward through the weekend, with gentle to moderate winds across the remainder of the open waters. Fresh to strong N winds may briefly pulse in the Gulf of Tehuantepec by Sun evening. NW swell will continue to impact most of the waters into early next week. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate NE gap winds are pulsing in the Papagayo region. Light to gentle winds prevail elsewhere north of the monsoon trough. South of the monsoon trough, gentle to moderate S to SW winds prevail. Seas are mainly in the 4-7 ft range in NW swell, reaching 8 ft near the Galapagos Islands. For the forecast, moderate gap winds will continue to pulse in the Papagayo region through the next several days, with light to gentle winds elsewhere N of the monsoon trough. Gentle to moderate winds are expected S of the monsoon trough. NW swell across the area waters will start to subside this weekend. ...REMAINDER OF THE AREA... Please read the Special Features section above for details about NW swells which will impact the waters N of 18N through the upcoming weekend. A 1028 mb high is centered near 30N132W. Light to gentle anticyclonic winds are in the vicinity of the high center. Moderate to fresh winds are elsewhere north of the ITCZ and west of 115W. Gentle to moderate winds prevail across the remainder of the open waters, including south of the ITCZ and monsoon trough. Aside from the large swell discussed above, seas are mainly in the 7 to 9 ft range. For the forecast, other than the large NW swell discussed in the Special Features section, little change in winds are forecast over the next several days. Seas of 8 ft or greater will cover most of the waters west of roughly 90W through this morning before subsiding. $$ ERA