000 AXPZ20 KNHC 091424 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Mon Jan 9 2023 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 1420 UTC. ...SPECIAL FEATURES... A complex Pacific low pressure system located well NNE of the Hawaiian Islands extends a cold front across the far NW portions of the area from 30N130W to 28N140W. Gale force SW winds are occurring within 90 nm E of the front, where seas are 15 to 18 ft. Strong SW winds prevail elsewhere within 240 nm SE of the front to 123W. The front will move E-SE through Mon, with gale force winds ahead of the front lifting N of the area today. Seas behind the front are expected to build to 15-20 ft this afternoon. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N74W to 06N94W. The ITCZ continues from 06N94W to 07N116W to beyond 05N140W. Widely scattered moderate convection is noted within 90 nm N of the ITCZ between 118W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A surface ridge prevails across the Baja California offshore waters. NW swell dominating the regional waters the past few days continues to subside. Associated seas range 6-9 ft across the open waters off Baja Mexico to Cabo Corrientes. Farther south, seas are 6-8 ft across the offshore waters from Cabo Corrientes to the Tehuantepec area, and 8 to 9 ft across the far outer waters. Gentle to moderate winds are noted west of the Baja California peninsula, as well as across most of the Gulf of California, extending to the waters off Cabo Corrientes. Seas across the Gulf are in the 2 to 4 ft range. Strong northerly winds prevail over the Gulf of Tehuantepec north of 14.5N, with seas near 8 ft. The remainder of the area is dominated by light to variable winds. For the forecast, high pressure will prevail across the area through mid week. NW swell west of the Baja California Norte waters will move through the area waters through tonight. Strong northerly winds will pulse over the Gulf of Tehuantepec each night through mid week. Seas will build across the regional waters Tue night through Wed night as another pulse of NW swell arrives. Looking ahead, the next Tehuantepec gale force gap wind event is expected on Fri. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong NE to E winds, and seas of 6-7 ft, continue across the Gulf of Papagayo region. Moderate northerly winds and seas of 3-5 ft are present in the Gulf of Panama. Elsewhere, light to gentle winds and moderate seas 4 to 6 ft prevail. For the forecast, fresh offshore winds across the Papagayo region will pulse to strong each night through mid week. Moderate to fresh northerly winds will also pulse in the Gulf of Panama through Tue. NW swell impacting the area waters will subside tonight through Wed. REMAINDER OF THE AREA... Please see SPECIAL FEATURES above for more the gale warning over the NW waters. Elsewhere, surface ridging prevails across the waters N of 20N. The pressure gradient between the area of high pressure and lower pressure in the vicinity of the ITCZ is supporting moderate to fresh winds N of the ITCZ to near 19N and west of 115W. The recent large NW to N swell continues to subside move through the regional waters and gradually subside. Peak seas of 11-12 ft are occurring south of 12N and between 95W and 110W. Seas elsewhere across the trade wind zone are 8-10 ft. New NW swell across the NW waters is producing seas of 12-18 ft. Gentle to moderate winds prevail south of the ITCZ. For the forecast, seas will continue to subside S of 24N today. New NW swell over the NW waters will peak near 20 ft. Another similar frontal system is expected to move through the NW waters Wed through Thu, bringing SW to W gales, and seas potentially to 30 ft. High pressure and moderate winds will dominate the trade wind belt. $$ AL