000 AXPZ20 KNHC 021440 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Thu Dec 2 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 1200 UTC surface analysis and satellite imagery through 1440 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: High pressure will build across the Gulf of Mexico. This will tighten the pressure gradient between this area of high pressure and lower pressure within the eastern north Pacific monsoon trough. This will usher in the next gale force gap wind event over the Gulf of Tehuantepec today. Winds are forecast to diminish below gale force Fri morning. Seas will build to near 11 ft with this latest gale- force gap wind event. 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 09N78W to 07N93W. The ITCZ continues from 07N93W to 06N110W to 10N122W. It then resumes from 10N130W to 09N140W. Scattered moderate convection is noted from 07N to 09N between 103W and 110W. Scattered moderate isolated strong convection is noted from 08N to 11N between 120W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Please see the Special Features section above for details on the upcoming gale-force gap wind event in the Gulf of Tehuantepec. Strong to near gale-force N to NE winds, and seas to 10 ft, prevail over the Gulf of Tehuantepec. Moderate to locally fresh NW winds are along the southern Gulf of California and the entrance of the gulf. Elsewhere, a weak pressure gradient prevails, supporting mainly light to gentle winds. 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, the strong to near gale-force N to NE winds in the Gulf of Tehuantepec region will briefly increase to gale- force this afternoon through Fri morning. Strong winds will then remain in the region before diminishing to moderate speeds Sun morning. Moderate to locally fresh NW winds at the entrance of the Gulf of California, and the southern Gulf of California will prevail through Sun. Moderate to locally fresh winds will develop over the waters west of the Baja California peninsula tonight and continue through Sun night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Fresh to strong NE winds, and seas to 8 ft, prevail over the Gulf of Papagayo. Gentle winds are elsewhere north of the monsoon trough. Gentle to moderate winds are south of the monsoon trough. Seas are in the 3-5 ft range. For the forecast, the fresh to strong NE winds in the Papagayo region will prevail through Mon night. Gentle to moderate S to SW winds are expected S of the monsoon trough through early next week. Moderate winds will impact the Gulf of Panama today. REMAINDER OF THE AREA... High pressure prevails across the waters north of 20N. The pressure gradient between this area 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 115W. Light to gentle winds are over the waters north of 20N, except W of 130W where moderate NE winds are observed. Moderate to locally fresh winds prevail south of the ITCZ. Seas are in the 5-7 ft range. $$ AL