Tropical Weather Discussion

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Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 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 0600 UTC surface analysis and satellite imagery through 0920 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 08N89W to 06N93W. The ITCZ stretches from 06N93W to 06N107W to 12N114W then resumes from 09N128W and beyond 09N140W. Scattered moderate convection is from 04N to 10N E of 100W, and from 06N to 13N W of 134W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Northeast winds associated with a surface trough near the Yucatan Peninsula is funneling through the Chivela Pass and causing fresh to strong gap winds in the Gulf of Tehuantepec this morning. A surface trough to the SW of the Revillagigedo Islands continues to generate heavy showers and thunderstorms mainly from 14N to 22N between 110W and 116W with scattered showers extending NE to the mouth of the Gulf of California. Fresh to strong NE winds are occurring in the mouth of the Gulf of California. Otherwise, a weak pressure gradient support light to gentle winds and moderate seas elsewhere, except for slight seas in the Gulf of California. For the forecast, fresh to strong N to NE winds in the Gulf of Tehuantepec will continue this morning and pulse again late Tue into Wed morning. A trough just SW of the Revillagigedo Islands will meander near the islands through Tue, bringing showers and thunderstorms and possibly locally strong winds and rough seas. Looking ahead, 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 through 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 moderate to 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 along with moderate seas. 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... Weak low pressure of 1016 mb is near 26N135W with a weak cold front trailing from this low to 23N132W over to 22N140W. Only moderate to locally fresh winds accompany and follow the front and low, and associated swell is supporting 8 to 11 ft seas N of 23N and W of 134W. A surface trough to the SW of the Revillagigedo Islands continues to generate heavy showers and thunderstorms mainly from 14N to 22N between 110W and 116W with scattered showers extending NE to the mouth of the Gulf of California. With this convection strong to gusty winds and rough seas are likely. 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 weak cold front in NW waters will drift S through today, then dissipate. Large NW swell will continue to spread southeastward across the NW subtropical and tropical waters today with seas peaking around 12 ft. Rough seas will reach E to 122W and S to 10N Tue and Tue night, before decaying into late week.