000 AXPZ20 KNHC 210354 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Wed Nov 21 2018 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 0000 UTC surface analysis and satellite imagery through 0315 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Gale force northerly winds are across the gulf waters continuing through Wed evening. Fresh to near gale force winds will prevail thereafter through Fri morning. Associated seas are forecast to build to up to 12 ft during the peak winds. The next gap wind event with gale force winds is likely to beging Mon morning. Please refer to the East Pacific High Seas Forecast under AWIPS/WMO headers HSFEP2/FZPN03 KNHC for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 08N78W to 08N83W to 07N90W to 06N102W. The ITCZ axis extends from 06N102W to 07N120W to 08N127W to 09N140W. Scattered moderate isolated strong convection is from 04N to 09N between 80W and 95W. Scattered moderate convection is from 04N to 12N between 118W and 125W, and from 06N to 17N W of 128W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See Special Features section for Gulf of Tehuantepec Gale Warning information. Gulf of California: Fresh breeze or weaker winds through Sat night. Enhanced pressure gradient from southwestern US to over the eastern Pacific should force NW strong breeze in the northern Gulf on Sunday. Seas should remain below 8 ft. A weak ridge west of Baja will support mainly moderate to fresh northerly winds through Fri night. The pressure gradient will tighten by early Sat, thus briefly contributing to NW strong winds west of Baja California Norte Sat morning through Sun. Long-period NW swell, in the form of 7 to 9 ft seas, will arrive to the offshores west of Baja California Norte Thu night. These swells will propagate as far S as 24N on Sat morning before diminishing on Sun. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: Fresh to locally strong NE winds with seas building briefly to 8 ft are expected through early Fri. Winds will diminish in the Gulf late Fri through Sun. The monsoon trough will meander between 08N and 10N for the next several days with NE moderate breeze or weaker north of the trough and SW moderate breeze or weaker south of the trough. Seas will remain below 8 ft. REMAINDER OF THE AREA... A cold front extends from 30N130W to 24N140W. Long-period NW swell of 8-10 ft is NW of the front. This swell will progress southeastward across the basin, peaking around 12-13 ft on Wed evening. The swell will gradually diminish in amplitude and drop below 8 ft on Fri. Moderate to fresh winds and seas up to 8 ft in mixed swell prevail from 10N to 14N between 136W and 139W. On Wed, the pressure gradient will tighten and result in a large area of strong breeze to near gale NE tradewinds generally between 12N and 20N W of 120W. Peak seas will reach near 13 ft due to NE wind waves with the aforementioned NW swell. These conditions will continue through Sat before diminishing on Sun. $$ NR