060 AXPZ20 KNHC 021555 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Mon Dec 2 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 1200 UTC surface analysis and satellite imagery through 1500 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: The pressure gradient between high pressure over eastern Mexico and the monsoon trough over the eastern North Pacific is supporting minimal gale force gap winds across the Gulf of Tehuantepec continuing through early Tue. Seas are 13 ft near and downstream of the Gulf this morning, and are expected to peak around 14 ft late tonight. High pressure will weaken tonight into Tue, allowing the gradient to relax and wind speeds to diminish below gale force Tue morning. Winds will further diminish, to 20 kt or less, by Tue night. See latest NWS High Seas Forecast issued by 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... A tropical wave from 07N to 15N with axis near 117W, moving westward around 10-15 kt. Scattered moderate convection is from 07N to 15N between 112W and 122W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N85W to 07N90W to 06N102W to 09N108W to 10N128W to 09N140W. Scattered moderate isolated strong convection is from 07N to 17N W of 132W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see the Special Features section above for information about the ongoing gale force gap wind event in the Gulf of Tehuantepec. Moderate to fresh NW to N winds prevail over the central and southern Gulf of California southward to near Las Tres Marias. Elsewhere, light and variable winds prevail off the coast of southern Mexico and Baja California Norte. A set of large NW swell is starting to move into the Baja California Norte waters this morning, with seas peaking near 11 ft today. This swell will continue to propagate SE into the Baja California Sur waters through Tue night before subsiding early on Wed. A weak high pressure ridge will cross the northern waters Tue and Tue night, briefly tightening the offshore gradient and producing fresh northerly winds near and south of Punta Eugenia. A weakening cold front or trough will pass over the northern waters Wed and Wed night. The next set of large NW swell will propagate into the waters off Baja California Norte late Fri night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to occasionally strong NE to E winds will pulse across and downstream from the Gulf of Papagayo through Fri. Moderate to locally fresh northerly winds will pulse across the Gulf of Panama through mid week, then diminish by Thu. Elsewhere, gentle to moderate S to SW monsoon flow will persist across the offshore waters of Costa Rica, Panama, Colombia, and Ecuador during the next several days, along with weak S to SW swell. REMAINDER OF THE AREA... A slow-moving, cold front extends across the northern waters from 30N124W to 21N136W. The front ushers in a set of large NW swell, which continue to spread SE across the NW region. Seas are currently peaking near 18 ft N of 25N. The front will stall Tue morning and then transition back to a cold front Wed before dissipating. The associated swell will continue to propagate SE while slowly subsiding N of 20N by Wed night. A weak ridge will develop west of Baja Tue afternoon, tightening the pressure gradient ahead of the front and supporting fresh to strong E to SE winds from 22N to 27N between 119W and 126W. This area of fresh to strong winds will drift northward through early Wed before diminishing to moderate to fresh winds. Otherwise, another set of large NW swell will move into the NW waters Thu. $$ NR