000 AXPZ20 KNHC 202207 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Tue Nov 20 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 1800 UTC surface analysis and satellite imagery through 2115 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Strong to near gale force northerly winds will pulse across the gulf waters increasing to minimal gale force this evening. Gale conditions will prevail through Wed afternoon, however the gap wind event will continue through Fri morning. Associated seas are forecast to build to up to 12 ft during the peak winds. 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 06N96W to 06N105W. The ITCZ axis extends from 06N105W to 07N120W to 10N130W to 09N140W. Scattered moderate convection is from 04N to 12N E of 93W, from 05N to 12N between 116W and 125W, and from 06N to 17N W of 130W. ...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 1018 mb surface high is meandering near 26N116W with a weak ridge extending across the Mexican offshore waters W of near 110W. Winds should remain at fresh breeze or weaker conditions through Fri night. The pressure gradient will tighten by early Sat, thus briefly contributing to a NW strong breeze west of Baja California Norte Sat morning through Sun. Long-period NW swell, in the form of 7 to 9 ft seas, will arrive at 32N120W late Thu, and reach the northern coast of the Baja Peninsula early Fri, with these swells propagating as far S as 22N late Fri night through Sat 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 dissipating cold front extends from 30N133W to 26N136W. Long- period NW swell of 8-9 ft is NW of the front. These will progress southeastward across the basin, peaking around 12-14 ft on Wed near 30N135W. The swell will gradually diminish in amplitude and drop below 8 ft on Fri. A 1010 mb low pressure is near 09N140W with moderate to fresh winds and seas are up to 8 ft in mixed swell east of the low. These will diminish below 8 ft on Wed. Finally beginning Wed, the pressure gradient will tighten and result in a large area of strong breeze to near gale NE tradewinds generally between 12N and 22N W of 120W. Peak seas will reach near 12 ft due to NE wind waves with the aforementioned NW swell. These conditions will continue through Sat before diminishing on Sun. $$ NR