000 AXPZ20 KNHC 271438 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Fri Dec 27 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 1200 UTC surface analysis and satellite imagery through 1430 UTC. ...SPECIAL FEATURES... Significant NW swell: A set of large NW swell will enter the NW waters today, which will bring seas of 12 ft or greater across the waters mainly north of 18N through the upcoming 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 09N84W to 05N100W to 06N105W. The ITCZ extends from 06N105W to 08N113W to beyond 07N140W. Scattered moderate convection is noted from 05N to 08N E of 85W, from 05N to 10N between 112W and 120W, and from 05N to 08N between 120W and 140W. ...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 ridge extends from a 1028 mb high pressure centered near 29N132W to the Revillagigedo Islands. The pressure gradient between this area of high pressure and lower pressure over Mexico is supporting moderate to fresh NW-N winds offshore Baja California Norte. Gentle to moderate winds prevail across the remainder of the open waters offshore Mexico. Light to gentle winds are in the Gulf of California. Seas are mainly 8 ft or greater across the offshore waters, except 4 to 7 ft from southern Mexico from Chiapas and Tehuantepec. 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 this weekend, with gentle to moderate winds across the remainder of the open waters. Fresh to locally strong N winds may briefly pulse in the Gulf of Tehuantepec Sun evening. NW swell will impact most waters into early next week. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate to locally fresh NE gap winds prevail in the Papagayo region, where seas are in the 4 to 6 ft range. 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 well offshore Guatemala and near the Galapagos Islands. For the forecast, moderate gap winds will 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 29N132W. 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 8 ft range east of 87W. 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 tonight before subsiding. $$ AL