Tropical Weather Discussion

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Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Thu Dec 4 2025 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 0800 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08N78W to 09N100W. The ITCZ runs from 09N100W to 11N121W, then resumes from 07N128W to beyond 04N140W. A surface trough breaks the ITCZ, analyzed from 22N119W to 07N127W. Scattered moderate convection is along the monsoon trough and E of 86W, from 06N to 12N between 99W and 107W, and from 07N to 12N and 118W and 126W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A surface trough prevailing SW of the Revillagigedo Islands is aiding in scattered moderate convection in the vicinity of Socorro Island. Fresh gap winds are noted in the northern Gulf of California. Moderate N winds are noted in the Gulf of Tehuantepec and off the west coast of Baja California Sur. Otherwise, light to gentle winds prevail. Moderate seas prevail across the Mexican offshore waters and the northern Gulf of California, while slight seas prevail across the southern half of the Gulf of California. For the forecast, the surface trough just southwest of the Revillagigedo Islands will keep thunderstorms near the islands through tonight. Moderate to fresh N winds will pulse in the northern Gulf of California tonight. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Surface ridging extending across the northern Caribbean supports fresh NE winds and moderate seas in Papagayo region. S of the monsoon trough, gentle S to SW winds and moderate seas prevail. Elsewhere, mainly light winds with moderate seas prevail. For the forecast, moderate to fresh gap winds will persist near the Papagayo region into tonight. Light to gentle winds and slight to moderate seas are expected elsewhere into the start of next week. ...REMAINDER OF THE AREA... A deep-layer trough axis extending roughly along 122W and N of 07N is inducing numerous moderate to isolated strong convection from 07N to 12N and 118W and 126W. To the west of this axis, moderate winds and seas, with rough seas, dominate N of the ITCZ. Elsewhere, gentle winds and moderate seas prevail. For the forecast, the large NW swell causing rough seas will decay today, with moderate seas then prevailing through the weekend. Moderate to fresh trades will dominate N of the ITCZ to 25N and W of 125W into the weekend, with moderate or weaker winds elsewhere.