000 AXPZ20 KNHC 030310 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Thu Dec 3 2020 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 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 0300 UTC. ...SPECIAL FEATURES... Gulf of California Gale Warning: Strong high pressure building across the Great Basin region of the U.S. will increase northerly winds in the Gulf of California through Fri night. Peak winds are expected Thu in the northern Gulf, with gale-force winds likely near 30N. Strong gusty NE winds are also expected on the west side of the Baja peninsula north of Punta Eugenia, with frequent gusts to gale force possible. Please read the latest NWS High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.html for more details. Gulf of Tehuantepec Gale Warning: Strong northerly gap winds and building seas are expected across the Tehuantepec region most of the forecast period. These winds will be associated first with a cold front moving across the western Gulf of Mexico, then with a surface trough developing north of the central Bay of Campeche on Sat. Strong winds, with frequent gusts to gale force are expected Thu night through Sat night, followed by sustained gale force winds Sun through Mon night. Seas are forecast to build to 12 or 13 ft with this gap wind event. Please read the latest NWS High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.html for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 09N84W to 06N94W to 10N106W to 11N116W to 10N121W. The ITCZ continues from 10N121W to beyond 09N140W. Scattered moderate convection is observed within 120 nm either side of the convergence zone axis in the following areas: between 85W and 88W, between 91W and 95W, between 103W and 124W, and between 135W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gentle to moderate NW winds and seas in the 6-8 ft range prevail across the offshore forecast waters of Baja California Norte and N of Cabo San Lazaro. Fresh to strong winds will funnel through the Baja California Norte passes into the offshore waters through Fri as strong high pressure builds over the Great Basin region. Strong northerly winds and building seas, with a maximum of 7 to 11 ft, are expected in the Gulf of California through Fri night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to locally strong NE to E winds are expected in the Gulf of Papagayo over the next couple of days, particularly during the overnight and early morning hours. Elsewhwere, light to gentle winds are expected north of the monsoon trough, with moderate to fresh S to SW winds south of the trough axis, through the upcoming weekend. REMAINDER OF THE AREA... High pressure located along 32N between 130W and 138W continues to dominate the northern forecast waters. The pressure gradient between the ridge and lower pressures in the vicinity of the ITCZ is supporting fresh trade winds from 09N to 20N west of 130W, and moderate to fresh winds elsewhere north of 10N and west of 120W. Seas are 8 to 9 ft across this area, based on altimeter data. Large long period NW swell will propagate across the NW waters tonight, building seas to 12-15 ft W of a line from 30N129W to 16N140W by Thu. Sea heights will diminish Thu night and Fri as the area of swell propagates to the east-southeast and decays. $$ Mundell