000 AXPZ20 KNHC 180917 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Sat Sep 18 2021 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0600 UTC surface analysis and satellite imagery through 0900 UTC. ...TROPICAL WAVES... The axis of a tropical wave extends along 87W and N of 05N, moving west around 10 kt. No significant deep convection is occurring over the Pacific in association with this wave. The axis of a tropical wave extends along 98W and N of 05N, moving west around 10 kt. Scattered moderate convection is noted N of 14N between 96W-101W. The axis of a tropical wave extends along 113W from 05N to 17N, moving west around 15 kt. No significant deep convection is noted in association with this wave. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N86W to 15N109W to 12N122W. The ITCZ continues from 12N122W to beyond 10N140W. Scattered moderate convection is occurring from 07N-14N and W of 126W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Surface ridging extends from 30N140W southeastward to 20N116W. Winds are tranquil throughout the Mexican offshores. Seas are 5-6 ft mainly in S swell along the Mexican Pacific offshore waters and 2-4 ft in the Gulf of California. In the forecast, the surface ridging west of California will promote moderate to fresh NW winds along the west coast of Baja California this weekend. A Gulf of Tehuantepec gap wind event should begin Tue night and may bring near-gale conditions on Wed. No tropical cyclone activity is expected for the next several days. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... A weak pressure gradient is promoting gentle to moderate winds across the Central American and equatorial offshore waters tonight. A SW swell is promoting seas 5-7 ft in the equatorial waters and around 6 ft in the Central American waters. Looking ahead, the moderate SW swell across the equatorial waters will diminish by Sun. Otherwise, tranquil conditions should prevail through at least Wed night. REMAINDER OF THE AREA... Surface ridging extends from 30N140W southeastward to 20N116W. The NE to E trades south of the ridge are moderate or weaker, as well as the SE to SW winds south of the monsoon trough/ITCZ. Seas are 7-8 ft S of 03N today primarily due to SW swell and 5-7 ft elsewhere. In the forecast, little change in winds across the basin is anticipated and no tropical cyclone activity is expected through the next several days. The moderate SW swell across the equatorial waters will diminish by Sun. A moderate NW swell may reach our northern border on Mon and Tue before beginning to diminish on Wed. $$ ERA