000 AXPZ20 KNHC 012207 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 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 1800 UTC surface analysis and satellite imagery through 2145 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 through early this evening with building seas to 18 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 10N85W to 07N90W to 09N110W to 08N125W. The ITCZ begins near 07N126W and continues to 08N136W. Scattered moderate convection is from 05N to 10N E of 88W, and from 08N to 15N 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 8 ft in long period NW swell N of Punta Eugenia. This swell is forecast to subside by 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 and into the offshore waters 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 Wed evening with seas building to 9 ft. Moderate to fresh winds will continue to pulse afterwards through the weekend. 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. Light to gentle winds are expected elsewhere N of the monsoon trough. Elsewhere, moderate to fresh S to SW winds are expected S 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 10N133W to 17N133W. Scattered moderate convection is in the vicinity of this elongated area of low pressure. Long period NW swell is entering the NW corner of the forecast region this evening with building seas of 8-10 ft. 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