000 AXPZ20 KNHC 090300 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0300 UTC Sat Nov 9 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 0000 UTC surface analysis and satellite imagery through 0300 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 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 85W N of 05N, moving W at 5 to 10 kt. Scattered moderate isolated strong convection was noted from 05N to 07N between 82W and 85W. The axis of a tropical wave is near 122W from 03N to 17N, moving W around 10 to 15 kt. Scattered moderate convection was noted from 05N to 10N between 120W and 125W. The axis of a tropical wave is near 131W from 05N to 15N, moving west at 10 kt. Scattered moderate convection is noted from 09N to 11N between 130W and 135W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N78W to 07N93W to 10N121W. The ITCZ extends from 10N124W to 10N131W. It resumes from 10N133W to 08N140W. Scattered moderate isolated strong convection is noted from 05N to 07N E of 86W to the coast of Colombia. Scattered moderate isolated strong convection was noted from 07N to 10N between 100W and 110W. Scattered moderate isolated strong convection was noted from 08N to 19N between 113W and 118W. Scattered moderate convection was noted from 05N to 10N between 120W and 130W. Scattered moderate convection was noted from 09N to 11N between 130W and 135W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See Special Features for details about the ongoing 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 1025 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