000 AXPZ20 KNHC 011606 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Tue Dec 1 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 1200 UTC surface analysis and satellite imagery through 1530 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: A gap wind event continues over the Gulf of Tehuantepec as strong surface high pressure builds across the Gulf of Mexico in the wake of a cold front. Gale force winds are expected to prevail today through the early night hours with building seas to 22 ft. Marine interest transiting across or in the vicinity of the Gulf of Tehunatepec should be aware of this gap wind event, and take necessary action to avoid these hazardous marine conditions over the affected waters. Please, see the latest 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 08N100W to 08N120W to 08N133W. Scattered moderate convection is from 03N to 09N E of 84W, from 07N to 14N between 98W and 125W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A Gale Warning is in effect for the Gulf of Tehuantepec. Please, see Special Feature Section for more details. Gentle to moderate NW winds prevails over Baja California Norte offshore waters with seas to 7 ft. Long period NW swell starting to enter the waters N of Punta Eugenia with seas to 8 ft will subside Wed night. Light to gentle winds will prevail elsewhere off the peninsula through early Thu. Fresh to strong winds are forecast to funnel through the Baja California Norte mountain passages Thu through Fri morning as strong high pressure builds over the Great Basin region. Moderate to fresh northerly winds along the Gulf of California will prevail through Wednesday with seas ranging between 3 to 5 ft. Fresh to strong northerly winds are forecast to begin over the northern gulf waters early on Thu, rapidly increasing to near gale force with building seas to 9 ft. These conditions will extend along the gulf waters and continue through Sat when winds are forecast to diminish to moderate to fresh. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong NE to E winds in the Gulf of Papagayo are expected through Thu with seas building to 9 ft. Mainly moderate to fresh NE winds will prevail the remainder of the forecast period. Seas generated by a strong gap wind event in the Gulf of Tehuantepec will propagate across the offshore waters of Guatemala and El Salvador through tonight. Elsewhere, moderate S to SW winds are expected S of the monsoon trough with mainly gentle easterly winds N of the monsoon trough. REMAINDER OF THE AREA... Surface high pressure continue to dominate the northern forecast waters. The pressure gradient between the ridge and lower pressure within the monsoon trough is supporting moderate to fresh NE to E winds north of 10N and west of 120W. Seas are generally 6-8 ft across this area. A surface trough is analyzed from 10N132W to 17N132W. Scattered moderate convection is in the vicinity of this elongated area of low pressure. Fresh to locally strong NE winds are from 12N to 17N between 125W and 133W with seas to 8 ft. A new set of long period NW swell is entering the NW corner of the forecast region today building seas to 8-10 ft N of 11N and W of a line from 26N123W to 12N130W by this afternoon. Another and larger NW swell event will begin to propagate across the NW waters on Wed, with building seas of 12-16 ft W of a line from 30N133W to 20N140W by Wed night into Thu. $$ Ramos