000 AXPZ20 KNHC 052103 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Sat Oct 5 2024 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 1800 UTC surface analysis and satellite imagery through 2100 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 11N86W to 1008 mb low pressure located near 16N102W to 09N120W to another 1008 mb low pressure situated near 14N135W to beyond 12N140W. Scattered moderate to isolated strong convection can be found from 12N to 17N between 100W and 106W. Scattered moderate convection is observed near 15N110W, and from 10N to 16N W of 131W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... High pressure of 1020 mb located near 29N131W extends a ridge across the offshore forecast waters of Baja California supporting light to gentle NW winds. Seas of 4 to 6 ft in NW swell prevail. In the Gulf of California, light and variable winds are noted per latest satellite derived wind data. Seas are 1 to 2 ft. Elsewhere, across the Mexican offshore waters, mainly light to gentle winds are observed with seas of 4 to 6 ft primarily in SW swell. For the forecast, a ridge will remain in control of the weather pattern across the offshore waters of Baja California producing gentle to moderate NW winds and slight to moderate seas into early next week. Looking ahead, a broad area of low pressure offshore of the coast of southern Mexico is producing limited shower activity. Environmental conditions appear conducive for gradual development of this system during the next several days, and a tropical depression could form by the middle of next week while the system moves slowly northwestward, roughly parallel to the coast of southwestern Mexico. This system has a low change of tropical cyclone development through 48 hours, and a medium chance through 7 days. Fresh to strong N winds and moderate to rough seas are expected in the Tehuantepec region by the middle of next week as a northerly flow establishes over the western Gulf of Mexico in the wake of tropical cyclone Milton. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Light and variable winds are seen N of 05N while gentle to moderate southerly winds prevail between the Equator and 5N. Seas are in general 3 to 5 ft in SW swell, except 1 to 3 ft in the Gulf of Panama, and in the coastal waters of Colombia. For the forecast, mainly gentle SW to W winds are forecast across the offshore waters from Guatemala to northern Costa Rica while gentle to moderate S to SW winds will prevail elsewhere through the forecast period. Moderate seas, in long period SW swell, are expected. ...REMAINDER OF THE AREA... A 1020 mb high pressure situated near 29N131W dominates the northern forecast waters. A 1010 mb low pressure is centered along the monsoon trough near 14N135W. Fresh wind are occurring within about 210 nm in the NE quadrant of the low center with seas of 6 to 7 ft. Elsewhere, moderate or weaker winds and moderate seas prevail, with the exception of moderate to fresh SE to S winds S of the monsoon trough between 120W and 130W, and from the Equator to 05N between 130W and 140W based on recent scatterometer data. For the forecast, high pressure will continue to dominate the north waters into early next week while strengthening some. The pressure gradient between the associated ridge and the low pressure along the monsoon will support an area of fresh winds in the NE quadrant of the low center through at least Mon. The low is forecast to open-up into a trough Mon night into Tue just W of area. $$ GR