000 AXPZ20 KNHC 081547 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1547 UTC Mon Jun 8 2020 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. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 07N78W to 14N97W to 1009 mb low pressure near 10N112W to 08N125W. The intertropical convergence zone continues from 08N125W to 06N140W. Scattered moderate convection is observed from 04N to 12N between 85W and 100W. Scattered moderate to isolated strong convection is noted from 08N to 11N between 108W and 112W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... The pressure gradient between a ridge across the offshore forecast waters of Baja California and lower pressures across north-central Mexico supports an area of fresh to strong NW winds N of Punta Eugenia, that extends westward to about 125W. These winds are reaching minimal gale force off the coast of Southern California. Seas generating by these winds are propagating into the waters off Baja California Norte as NW swell. The winds will diminish today as the gradient relaxes, but the swell will persist through Tue, peaking at 10 to 13 ft off Baja California Norte early this morning. Seas of 8 ft will spread southward reaching the offshore waters north of Cabo San Lazaro later today and persisting through Tue. High pressure building across the Great Basin will briefly bring fresh to strong northerly winds and seas of 5-6 ft to the northern Gulf of California today, with moderate to fresh northerly winds persisting through Tue. A SW swell train, with a leading edge period of 19 to 20 seconds, currently dominates most of the offshore forecast waters of Mexico, including the entrance to the Gulf of California, with seas of 5-7 ft south of Los Cabos. Looking ahead, fresh to strong northerly gap winds are expected in the Gulf of Tehuantepec Thu night through Fri night, with seas likely building to 10-11 ft. This gap wind event will likely be associated with a building ridge across the eastern slopes of the Sierra Madre mountains in Mexico and the western Gulf of Mexico. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... A return to a more climatological monsoon trough position is noted on the surface analysis. Now, it remains just south of Panama and Costa Rica, helping to induce some convective activity. Gentle to moderate SW-W winds will prevail across the offshore waters, with the exception of S winds between Ecuador and the Galapagos Islands. Cross equatorial SW swell will continue to propagate across the region, with seas building 8-9 ft between Ecuador and the Galapagos Islands tonight into Tue. Similar wave heights, associated with the same swell event, are forecast to reach the offshore waters of West Panama and Costa Rica by Tue night into Wed, including also the Azuero Peninsula and the entrance to the Gulf of Panama. REMAINDER OF THE AREA... A ridge extends from a high pressure of 1028 mb located near 35N132W toward southern Baja California Sur. The pressure gradient between the ridge and lower pressures in the vicinity of the ITCZ currently supports an area of moderate to fresh trade winds from 10N to 20N west of 130W, with seas of 8-9 ft in mixed NE and SW swell. Southerly swell will continue moving northward across the waters south of 10N-11N between 100W and 120W through today while subsiding. Another set of long period southerly swell will reach the waters south of the equator by later today, building seas to 8 ft south of the equator. This swell event will propagate across the waters south of 10N between 90W and 110W, except in the lee of the Galapagos Islands by Tue night. $$ Christensen/GR