Tropical Weather Discussion

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Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Mon Dec 1 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 1800 UTC surface analysis and satellite imagery through 2000 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N84W to 07N97W. The ITCZ stretches from 07N97W to 12N113W then resumes from 11N126W to beyond 09N140W. Scattered moderate to isolated strong convection is from 04N to 10N E of 97W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Fresh to locally strong gap winds funneling through the Chivela Pass are impacting the Gulf of Tehuantepec. A surface trough W of the Revillagigedo Islands continues to generate showers and thunderstorms mainly from 14N to 22N between 110W and 116W. Moderate N winds are occurring from the mouth of the Gulf of California SW to the Revillagigedo Islands. Moderate NW winds have also developed in the northern Gulf of California. Elsewhere, a weak pressure gradient supports mainly gentle winds and moderate seas, except for slight seas in the central and southern Gulf of California. For the forecast, fresh N to NE winds in the Gulf of Tehuantepec will pulse to strong late Tue into Wed morning. A trough just SW of the Revillagigedo Islands will meander near the islands through Tue night, bringing thunderstorms. Moderate long-period NW swell will reach the Baja California Norte offshore waters Tue, then subside Thu. Otherwise, moderate to fresh N winds will pulse in the northern Gulf of California into Fri night. ...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 in the Gulf of Papagayo. South of the monsoon trough and between Ecuador and the Galapagos Islands, winds are gentle to moderate from the S to SW. Elsewhere, light to gentle winds prevail. Moderate seas encompass the entire region. For the forecast, fresh gap winds will pulse nightly this week in the Papagayo region. Moderate or lighter winds and moderate seas are expected elsewhere through Fri night. ...REMAINDER OF THE AREA... Low pressure of 1016 mb is near 25N135W with a stationary front trailing from this low to 22N134W over to 21N140W. Fresh E winds are noted N of the low along with rough seas. A surface trough to the SW of the Revillagigedo Islands continues to generate showers and thunderstorms mainly from 14N to 22N between 110W and 115W. There is a zone of moderate to fresh NE winds NW of the trough from 14N to 22N between 115W and 123W. The rest of the tropical eastern Pacific is under the influence of modest ridging, leaving winds mainly gentle, and seas moderate. For the forecast, the low pressure and associated front will dissipate tonight. Large NW swell will continue to spread southeastward across the NW subtropical and tropical waters tonight. Rough seas will reach E to 120W and S to 09N Tue and Tue night, before decaying into late week.