000 AXPZ20 KNHC 040350 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Sun Dec 4 2022 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 0000 UTC surface analysis and satellite imagery through 0330 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: A tight pressure gradient will continue supporting gale-force winds across the Gulf of Tehuantepec through Sun night. Seas will build to 12 ft tonight through Sun. Winds and seas are expected to gradually improve by early Mon. Please see the latest High Seas Forecast at http://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from the coast of Costa Rica near 09N83W to 07N100W to 08N119W. Surface trough extends from 12N121W to 08N121W. The ITCZ extends from 08N124W to beyond 08N140W. Scattered moderate isolated strong convection is noted from 08N to 17N between 106W and 118W. Scattered moderate convection is noted from 04N to 09N and E of 104W and from 05N to 10N between 119W and 137W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See the Special Features section for the gale-force gap wind event over the Gulf of Tehuantepec. Light to gentle winds dominate the offshore forecast waters of Baja California as a 1016 mb high pressure remains located near 26N122W. NW swell continues to move across the far NW Baja California offshore waters, bringing 8 ft seas N of 25N and W of 116W. Seas are 4-7 ft within NW swell elsewhere across the Baja California offshore waters. Moderate to fresh NW winds prevail in the central and southern Gulf of California with light winds over the northern Gulf with 2-3 ft seas. Elsewhere across the remaining Mexican offshore waters, outside of the Tehuantepec region, light to gentle winds and seas of 3-5 ft are noted in mixed swell. For the forecast, gale-force winds over the Gulf of Tehuantepec will prevail through Sun night. Seas are expected to build to 12 ft tonight into Sun. Winds and seas will improve over the region on Mon. NW swell currently moving over the Baja California Norte waters will subside tonight. A weak cold front is expected to approach the Baja California Norte waters on Sun and will dissipate by Mon. This front will bring another round of NW swell across the Baja Norte waters by Sun night and will quickly subside on Mon. Fresh winds will pulse across the Gulf of California through midweek as high pressure builds across the Baja region. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to strong NE-E winds prevail across the Papagayo region and downwind to near 89W. Peak seas are estimated at 6 ft. Light to gentle variable winds prevail elsewhere N of the monsoon trough along 08N, with seas of 4-6 ft. Light to gentle S to SW winds and 3-4 ft seas are seen to the S of the trough. Light to gentle S to SW winds prevail off the Ecuador offshore waters to the Galapagos Islands with seas 3-4 ft. For the forecast, fresh to strong gap winds over the Papagayo region will pulse across the area through midweek. Elsewhere, little change in the marine conditions is forecast. Mainly gentle to moderate winds will prevail across the offshore waters of Central America, Colombia, and Ecuador. Slight seas can be expected across most of the offshore waters region through midweek, except in the Papagayo region. NW swell generated from the Tehuantepec gap wind event will move across the offshore waters of Guatemala and El Salvador through Sun night. REMAINDER OF THE AREA... A frontal boundary stretches from 30N126W to 23N136W. Latest Fresh winds with seas to 12 ft are near and north of the front. The front will dissipate tonight into Sun. Its associated swell will slowly subside through Mon night. Please see the latest High Seas Forecast at http://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. A 1016 mb high pressure is centered across the NE forecast waters near 26N122W, and extends a ridge south and southeastward that covers the waters N of 23N between 112W and 120W. Light to gentle anticyclonic flow is noted across the area. Fresh to strong winds are near a trough along 107W from 09N to 14N between 105W and 112W. Seas to 8 ft are likely within this area. A surface trough is embedded in the monsoon trough along 122W. Moderate winds prevail in the vicinity of the trough with seas ranging between 6-7 ft. Elsewhere N of the monsoon trough, gentle to moderate winds and seas of 4-6 ft are noted. Moderate SE to S winds winds and seas of 6-7 ft are seen S of the monsoon to the equator and W of 95W. For the forecast, a reinforcing cold front will enter the NW waters on Sun and weaken by Mon night. High pressure will build across the area through next week, which will strengthen winds to fresh to strong across much of the area N of the ITCZ and W of 120W by Tue through the week. $$ AReinhart