000 AXPZ20 KNHC 292146 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Fri Oct 29 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 1800 UTC surface analysis and satellite imagery through 2145 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Strong low pressure across the eastern U.S. will maintain a tight pressure gradient in the western Gulf of Mexico this evening. This will allow for the northerly gap winds across the Gulf of Tehuantepec to continue tonight. The northerly gale force winds will continue through the evening and gradually subside late tonight. Peak seas are estimated to reach up to 13 ft. Refer to the latest High Seas Forecast issued by the National Hurricane Center at: https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from the northern coast of Costa Rica near 10N85W to 10N103W to 1012 mb low pres near 10N115W to another 1012 mb low pres near 10N134W. The ITCZ extends from 09N135W to beyond 10N140W. Scattered moderate convection is noted along the boundary within 180 nm south of the boundary E of 103W to the Colombian coast, and from 106W to 112W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Refer to the section above for details on the Gale Warning in effect for the Gulf of Tehuantepec. Light to gentle variable winds prevail across the Gulf of California today. Latest altimeter pass indicates seas 2 to 3 ft in the Gulf. Gentle to moderate NW-N winds continue elsewhere offshore of Mexico. The large NW swell offshore of Mexico will continue to propagate towards the southeast with seas of 8 to 9 ft N of 25N and W of 118W. Seas of 4 to 6 ft prevail E of 118W. For the forecast, light to gentle winds will prevail across the Gulf of California through the forecast period. Large NW swell W of 118W will gradually subside this evening with light to gently winds continuing through the weekend. The next set of large NW swell will approach the Baja California area by early next week with moderate to fresh wind increasing through mid week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Gentle to moderate S-SW winds are occurring S of the monsoon trough, locally fresh near the entrance to the Gulf of Guayaquil, with mainly light and variable winds north of the monsoon trough. Seas are 4 to 6 ft, except 5 to 7 ft offshore of Ecuador in a moderate southerly swell. For the forecast, gentle to moderate SW winds will persist south of the monsoon trough, with light to gentle variable winds N of the monsoon trough, pulsing to moderate to fresh in the Papagayo region beginning on Sun and prevailing through early next week. A moderate southerly swell will persist through Sat, subsiding thereafter. REMAINDER OF THE AREA... Moderate to fresh trades dominate the waters N of the convergence zone with gentle to moderate southerly flow S of the convergence zone. Large NW-N swell continues to propagate and are gradually subsiding across the open waters with seas of 8 to 9 ft W of 99W. Seas of 5 to 7 ft in remnant mixed swell prevail E of 99W. For the forecast, winds will diminish into the weekend across the majority of the waters as the pressure gradient slackens. Fresh to strong S-SW winds will increase ahead of the next cold front that is forecast to enter near 30N140W on Sun. The front will dissipate and associated winds will diminish by early next week. A new set of NW swell will breach southeast of 30N140W early Sun with the next front, propagating southeast through early next week. $$ Torres