468 AXPZ20 KNHC 200054 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Fri Nov 19 2021 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 0000 UTC surface analysis and satellite imagery through 0240 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: The pressure gradient between high pressure building behind a Gulf of Mexico front and lower pressure within the eastern north Pacific monsoon trough is supporting gale-force north to northeast winds across the Gulf of Tehuantepec. Gale- force winds will continue through late Sat morning before diminishing. Winds will be at near gale- force Sat afternoon and late Sat night. Seas will peak near 12 ft tonight. Please see the latest NWS High Seas Forecast issued by the National Hurricane Center at website://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more information. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N85W to 07N93W to 08N101W. The ITCZ continues from 08N101W to 10N128W. It resumes from 10N134W to 10N140W. Scattered moderate convection is noted from 04N to 08N between 82W and 96W. Scattered moderate isolated strong convection is from 07N to 10N between 100W and 122W, from 07N to 17N between 122W and 132W, and from 06N to 11N between 132W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Please see the Special Features section above for details on the latest Gulf of Tehuantepec gale-force gap wind event. Gale force winds, and seas to 11 ft, prevail over the Gulf of Tehuantepec. Elsewhere, a ridge extends from high pressure of 1022 mb near 29N135W southeast to the west of the Baja California peninsula. Gentle to locally moderate winds prevail over the open waters off Mexico, with light to gentle winds prevailing over the Gulf of California. Seas are in the 4-5 ft range over the open waters off Mexico, with 1-3 ft seas over the Gulf of California. For the forecast, gale-force winds will prevail across the Gulf of Tehuantepec region through Sat morning. Gap winds may once again approach gale-force again in the Gulf of Tehuantepec region early next week as strong high pressure surges southward over eastern Mexico. Fresh to strong northwest to north winds may develop in the northern Gulf of California early next week. Fairly tranquil conditions are forecast elsewhere through the weekend and into early next week. Fresh northwest winds are expected offshore Baja California Norte during the middle of next week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Fresh to strong winds prevail over the Papagayo region. Otherwise, light to gentle winds are noted north of the monsoon trough. Gentle to moderate southerly winds prevail south of the monsoon trough. Seas are in the 4-7 ft range across the majority of the offshore waters, highest south of Panama and west of Colombia and Ecuador. For the forecast, fresh to strong east winds in the Papagayo region will continue through Sat. Winds will pulse to fresh to strong speeds once again early on Sun, then remain at moderate to fresh speeds thereafter. Gentle to moderate winds will prevail across the rest of the area the next several days. REMAINDER OF THE AREA... A 1022 mb high pressure center is located near near 29N135W. A surface trough extends from 16N127W to 07N133W. The pressure gradient between the area of high pressure and the surface trough is supporting fresh to strong winds, and seas of 8 to 10 ft, are found over the northern portion of the trough. Moderate to fresh east winds prevail elsewhere from 10N to 20N between 120W and 140W. Light to gentle winds are in the vicinity of the high center. Gentle to moderate winds are elsewhere north of the ITCZ. Gentle to moderate southerly winds are south of the monsoon trough and ITCZ. Seas of 5-7 ft are observed over the waters within the moderate to fresh winds. Elsewhere, seas of 4-6 ft prevail. For the forecast, the area of fresh to strong east winds between the trough and the area of high pressure will diminish to mainly fresh speeds during Sat afternoon, with seas to 8 ft in mixed swell. $$ AL