000 AXPZ20 KNHC 011604 RRA TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Sun Dec 1 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: Surface high pressure will build over the western Gulf of Mexico tonight in the wake of a cold front. The pressure gradient between this area of high pressure and the monsoon trough over the eastern North Pacific will support minimal gale force winds in the Gulf of Tehuantepec late Sun night through early Tue. Associated seas will build to 12 ft near and downstream of the Gulf, peaking around 13 ft early on Tue. Return flow will establish in the western Gulf of Mexico Tue afternoon, thus resulting in winds diminishing to fresh. 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 is from 04N to 13N with axis along 96W. No significant convection is associated with this wave. A tropical wave axis is from 04N to 15N with axis along 116W, moving westward around 15 kt. Scattered moderate to strong convection is from 07N to 16N between 109W and 119W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08N83W to 07N90W to 07N100W to 10N110W to 08N115W to 10N123W to 08N127W. The ITCZ continues from 08N127W to 07N130W to 07N140W. Scattered moderate convection is from from 04N to 08N W of 134W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see the Special Features section above for information about the upcoming gale force gap wind event in the Gulf of Tehuantepec. Gentle to moderate N to NE winds prevail across much of the region, except for fresh winds off the coast of Sinaloa, Mexico and the entrance of the Gulf of California. A set of large NW swell will move into the Baja California Norte waters Mon morning with 8-11 ft seas prevailing through Mon night. This swell will continue to propagate SE through the Baja California Sur waters through Tue night before subsiding early on Wed. Otherwise, moderate to fresh NW winds will continue in the Gulf of California through Tue, then diminish to gentle to moderate for the remaining week. 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 morning. Moderate to locally fresh northerly winds will pulse across the Gulf of Panama through Tue, then diminish by mid week. 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 cold front extends across the NW waters from 30N126W to 25N131W to 21N140W. Fresh to strong SW winds prevail within 120 nm ahead of the front N of 27N while moderate to fresh W to NW flow continues behind the front. The front is accompanied with large NW swell with wave heights near 20 ft over the far NW waters. This swell will peak near 22 ft today. The front will continue to move east across the northern waters and weaken into a surface trough over Baja California offshores Wed evening. The swell associated with the front will spread SE while slowly decaying through late Wed over most of the northern waters. Another set of large NW swell will move into the NW waters Thu. $$ Ramos