000 AXPZ20 KNHC 082114 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2052 UTC Fri Nov 8 2019 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 2100 UTC. ...SPECIAL FEATURE... Gulf of Tehuantepec Gale Warning: A surface ridge across the eastern slopes of the Sierra Madre Mountains in Mexico is supporting minimal gale force northerly winds across the Tehuantepec region with seas up to 12 ft. Winds are forecast to further to peak near 40 kt tonight and Sat, with seas building up to 16 or 17 ft. Winds will decrease below gale force on Sun as the gradient weakens, then continue to diminish through Mon. Looking ahead. the next Tehuantepec gale force wind event is forecast Tue night into Wed. Please, see latest NWS High Seas Forecast issued by the National Hurricane Center under AWIPS/WMO headers HSFEP2/FZPN03 KNHC or at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details. ...TROPICAL WAVES... the axis of a tropical wave is near 84W N of 05N, moving W at 5 to 10 kt. Scattered moderate isolated strong convection was noted from 04N to 07N between 82W and 84W. The axis of a tropical wave is near 121W from 03N to 17N, moving W around 10 to 15 kt. The wave is interacting with an upper level low, producing scattered moderate isolated strong convection from 07N to 19N between 112W and 120W, and scattered moderate convection was noted from 05N to 10N between 120W and 125W. The axis of a tropical wave is near 130W from 05N to 15N, moving west at 10 kt. Scattered moderate convection is noted from 05N to 10N between 125W and 132W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08N78W to 09N110W. The ITCZ continues from 09N110W to 11N118W. It resumes from 11N121W to 10N128W. Then resumes from 11N132W to 09N138W. Scattered moderate isolated strong convection is noted from 04N to 07N E of 84W to the coast of Colombia. Scattered moderate convection was noted from 07N to 10N between 104W and 112W. Scattered moderate isolated strong convection was noted from 07N to 19N between 112W and 120W. Scattered moderate convection was noted from 05N to 10N between 120W and 128W. Scattered moderate convection was noted from 09N to 12N between 128W and 135W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See Special Features for details about a Gulf of Tehuantepec gale force gap wind event. Elsewhere, a ridge dominates the offshore forecast waters of Baja California supporting gentle to moderate northerly winds and seas generally under 6 ft. Little change is expected through Tue. Winds will freshen across central and southern portions of the Gulf of California through this evening. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Strong high pressure north of the Caribbean waters will support fresh to occasionally strong offshore winds across the Papagayo region through Mon night. Farther south, gentle to moderate S-SW monsoonal flow will continue across the offshore forecast waters of Costa Rica, Panama, Colombia, and Ecuador through Tue. REMAINDER OF THE AREA... A surface ridge extends from 1024 mb high pres near 34N128W to near the Revillagigedo Islands. The pressure gradient between the ridge and lower pressure in the vicinity of the ITCZ is supporting moderate to fresh NE trades N of the ITCZ. No cold fronts are expected to reach the area during the next three or four days, and no significant long-period swell events are expected to impact the forecast region as well. Seas will briefly build to 8 ft across the far NW corner on Tue. $$ AL