000 AXPZ20 KNHC 250902 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0901 UTC Wed Oct 25 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 Storm Warning: A reinforcing cold airmass north of the area has helped increase winds to storm force over the Gulf of Tehuantepec, with seas building to near 24 ft. The storm force winds are expected to diminish to gale force, with the gale force winds persisting into Thursday. Winds may once again increase to gale force this weekend. INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 13N87W to 10N96W to 10N104W to 09N113W to 08N140W. Scattered moderate isolated strong convection is noted from 06N to 10N between 80W and 87W. Scattered moderate isolated strong convection was noted within 90 nm south of the monsoon trough between 90W and 94W. Scattered moderate isolated strong convection was noted from 08N to 16N between 98W and 102W. Scattered moderate isolated strong convection was noted from 07N 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 a strong gale/minimal storm event. Gulf of California: Strong NW winds with seas to 7 ft currently across the gulf waters N of 30N will diminish to 20 kt or less this morning. A surface ridge prevails west of the Baja California peninsula. Light to gentle N winds will accompany the ridge through early Sat. Seas in the 6 to 9 ft range prevail over the waters off the Baja California peninsula in long period NW swell. Seas will diminish below 8 ft today, with slight to moderate seas prevailing by late week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gentle to moderate W winds across the waters N of 09N will become northerly today and Thu. Fresh to strong southerly winds are expected S of 09N through tonight. Low pres is expected to develop off the Pacific coast of Costa Rica on Thu and move northwestward through the upcoming weekend. REMAINDER OF THE AREA... A broad ridge dominates the waters N of 15N W of 115W, with gentle to moderate anticyclonic flow and combined seas of 7 to 9 ft in mixing cross-equatorial southerly swell and long period NW swell. These seas will gradually subside to less than 8 ft on Thu. A fresh set of NW swell will move into the northwest waters Friday, with seas rapidly building and peaking near 14 ft near 30N140W Friday night before beginning to subside. $$ AL