000 AXPZ20 KNHC 220240 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Mon Nov 22 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 to 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 07N108W. The ITCZ continues from 07N108W to 10N128W to 09N140W. Scattered moderate convection is noted from 06N to 08N between 80W and 85W. Scattered moderate isolated strong convection is noted from 05N to 11N between 94W and 110W, and from 08N to 10N between 118W and 130W. Scattered moderate convection is noted from 08N to 10N between 133W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Please see above for more information on an upcoming gale-force gap wind event over the Gulf of Tehuantepec. Strong to near gale- force winds prevail over the Gulf of Tehuantepec. A surface ridge extends west of the Baja California peninsula. Light to gentle winds prevail across the open waters off Mexico as well as the southern Gulf of California. Moderate to fresh winds are noted over the central and northern Gulf of California. Seas are in the 4-6 ft rage over the open waters off Mexico, 1-3 ft over the southern Gulf of California, and 2-4 ft over the northern and central Gulf of California. For the forecast, the strong to near gale- force winds across the Gulf of Tehuantepec will increase to gale- force Mon night into Tue as strong high pressure surges southward over eastern Mexico. Fresh to strong northwest winds over the northern Gulf of California will diminish to moderate speeds Mon afternoon. Strong winds will redevelop Wed then spread across the entire Gulf through Fri before beginning to diminish Fri night. Moderate northwest to north winds are expected offshore Baja California Norte beginning Wed and continue through Fri, then diminish slightly Fri night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Moderate to fresh speeds, 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 in south to southwest swell. For the forecast, the fresh northeast to east winds in the Papagayo region will pulse to strong speeds early Tue and diminish back to fresh speeds Tue afternoon. Gentle to moderate winds will prevail across the rest of the area for the next several days. REMAINDER OF THE AREA... Broad 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 northeast to east winds north of the ITCZ to near 22N and west of 125W. Gentle to moderate winds are elsewhere over the discussion waters. Seas of 6-8 ft continue in the area of fresh winds and 4-6 ft elsewhere. $$ AL