267 AXPZ20 KNHC 092023 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 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 1800 UTC surface analysis and satellite imagery through 2020 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 30N128W to 28N140W. Gale force W winds are occurring W of the front, where seas are 15 to 18 ft. Strong SW winds prevail within 180 nm SE of the front to 122W. The front will move E-SE, with gale force winds diminishing by tonight. Another low pressure system will bring another front and gale force winds over the NW waters mid week. ...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 132W. 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 have subsided below 8 ft. A new set of NW swell has moved into the waters west of Baja California Norte, with seas in the 7-9 ft range. Gentle to moderate winds are noted 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 13N, 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, with seas of 7-10 ft over much of the discussion waters. A new set of NW swell is propagating over the northern waters, with seas in the 12-16 ft range north of 25N and west of 125W. Gentle to moderate winds prevail south of the ITCZ. For the forecast, seas will continue to subside S of 20N tonight. Successive sets of NW swell will propagate through the discussion waters through the week. Otherwise, high pressure and moderate winds will dominate the trade wind belt. $$ AL