000 AXPZ20 KNHC 260902 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0901 UTC Thu Oct 26 2017 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0600 UTC surface analysis and satellite imagery through 0900 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Overnight ASCAT pass indicated winds have diminished to 40 kt over the Gulf of Tehuantepec. Seas are near 21 ft. Winds are expected to further diminish, falling below gale force this afternoon, then to 20 kt or less Friday. Large NE swell generated from this event continues to propagate S and mix with long period cross- equatorial southerly swell, with a plume of seas 12 ft or greater forecast to reach as far S as 05N between 93W and 101W. The next gale force gap wind event is expected this weekend. INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 12N86W to 12N92W to 08N99W to 10N107W to 10N120W to 09N131W to 08N140W. Scattered moderate to strong convection was noted from 08N to 13N between 85W and 91W. Scattered moderate isolated strong convection is noted from 08N to 10N between 92W and 99W. Scattered moderate convection was noted from 08N to 10N between 110W and 130W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gulf of Tehuantepec: please see the special features section above for information on the latest gale event. Elsewhere, winds will remain at 20 kt or less with seas 8 ft or less through Saturday night when the next set of NW swell propagates into the offshore waters off the coast of Baja California Norte. Seas will peak near 10 ft on Sunday. The swell will spread southeast, with seas 8 ft or greater covering the entire length of the offshore waters off the Baja California peninsula by Sunday night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Low pressure is expected to develop off the coast of Costa Rica and Nicaragua today. The low is forecast to move northwestward through the upcoming weekend, with the possibility of tropical cyclone formation. REMAINDER OF THE AREA... A broad ridge dominates the EPAC waters N of 15N W of 115W accompanied by gentle to moderate anticyclonic flow, and combined seas of 5 to 7 ft, in mixing cross-equatorial southerly swell and long period NW swell. A fresh set of long-period NW swell will move into the northwest waters Friday. Seas will peak near 14 ft late Friday night into Saturday morning. The swell will propagate southeast, with seas 8 ft or greater covering the much of the forecast waters west of 120W by Sunday night. $$ AL