000 AXPZ20 KNHC 210132 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Sun Nov 21 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: A cold front will move across the Gulf of Mexico early next week. High pressure will build along eastern Mexico in the wake of the front. The tightening pressure gradient between this building high pressure and lower pressure within the eastern north Pacific monsoon trough will usher in the next gale- force gap wind event across the Gulf of Tehuantepec. Gale-force winds are forecast from Mon night through Tue before diminishing. Seas will peak near 12 ft early Tue morning. 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 09N84W to 07N97W to 09N106W. The ITCZ continues from 09N106W to 11N116W to 09N127W to 09N140W. Scattered moderate convection is noted from 08N to 11N between 80W and 90W, and from 09N to 11N between 109W and 127W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Please see above for more information on the next gale- force gap wind event over the Gulf of Tehuantepec. Strong to near gale-force winds, and seas 8-10 ft, prevail over the Gulf of Tehuantepec. Gentle winds are noted elsewhere over the open waters off Mexico. Over the Gulf of Tehuantepec, light to gentle winds prevail. Seas are in the 4-5 ft range over the open waters off Mexico, and 1-3 ft over the Gulf of California. For the forecast, strong to near gale-force north to northeast winds across the Gulf of Tehuantepec will diminish slightly on Sunday. Winds over the Gulf of Tehuantepec will increase to gale- force Mon night and Tue as strong high pressure surges southward over eastern Mexico. Fresh to strong northwest to north winds may briefly develop in the northern Gulf of California on Mon, then spread across the entire Gulf late in the week along with building seas. Moderate northwest to north winds are expected offshore Baja California Norte beginning Wed. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Moderate to fresh winds, and seas to 6 ft, prevail over the Gulf of Papagayo. Light to gentle winds are elsewhere north of the monsoon trough. Gentle to moderate winds prevail south of the monsoon trough. Seas are in the 4-5 ft range. For the forecast, fresh northeast to east winds in the Papagayo region will pulse to fresh to strong speeds early on Sun before diminishing to fresh speeds Sun afternoon. Winds over the Gulf of Papagayo will once again pulse to strong speeds on Tue and Wed. Gentle to moderate winds will prevail across the rest of the area for the next several days. REMAINDER OF THE AREA... High pressure prevails over the northern waters. The pressure gradient between this are of high pressure and lower pressure in the vicinity of the ITCZ is supporting moderate to fresh winds north of the ITCZ to near 20N and west of 120W. Winds are locally strong from 10N to 12N between 125W and 130W. Gentle to moderate winds prevail elsewhere. Seas are reaching 8 ft in the region of strong winds, and 4-6 ft elsewhere. The area of fresh to strong east winds will diminish to fresh speeds by early on Sun, with lingering seas to 8 ft in mixed swell. $$ AL