- NHC Eastern Pacific Tropical Weather Discussion
by nhcwebmaster@noaa.gov (nhcwebmaster) on November 30, 2025 at 8:44 PM000AXPZ20 KNHC 302044TWDEPTropical Weather DiscussionNWS National Hurricane Center Miami FL2205 UTC Sun Nov 30 2025Tropical Weather Discussion for the eastern Pacific Ocean from03.4S to 30N, east of 120W including the Gulf of California, andfrom the Equator to 30N, between 120W and 140W. The followinginformation is based on satellite imagery, weather observations,radar, and meteorological analysis.Based on 1800 UTC surface analysis and satellite imagery through2030 UTC....INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...The monsoon trough extends from 08N81W to 08N105W to 08N128W. The ITCZ stretches from 08N128W to beyond 06N140W. Numerous moderate to isolated strong convection extends from 11N to 20N between 109W and 116W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...Higher pressure over Mexico is causing fresh gap winds in theGulf of Tehuantepec. A deep later trough with an axis extendingnorthward through the Revillagigedo Islands toward the southerntip of Baja California is leading to some showers andthunderstorms mainly near the Islands. Fresh N winds areoccurring in this area and extend NE to Cabo Corrientes and themouth of the Gulf of California. Locally higher winds and seasare likely in the stronger convection, especially around SocorroIsland. The remainder of the basin is in a weak pressure gradient with light to gentle winds. Moderate seas prevail for most offshore waters, with slight seas in the Gulf of California.For the forecast, fresh winds in the Gulf of Tehuantepec willpulse to strong tonight and 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 starting Thu. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR...Surface ridging extending across the northern Caribbean supportsmoderate to fresh NE winds in the Gulf of Papagayo. South of themonsoon 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 dominate area waters. For the forecast, fresh gap winds will pulse nightly this week in the Papagayo region. Moderate or lighter winds and moderate seas are forecast elsewhere through the forecast period. ...REMAINDER OF THE AREA...Weak low pressure has slide southward to near 30N129W. A weakcold front trails from this 1014 mb low to 25N134W over to25N140W. Earlier convection near the front has dissipated today.Only moderate to locally fresh winds accompany and follow the front and low, and associated swell has now decayed, allow waveheights to fall below 8 ft. A deep layer trough with an axis roughly along 115W, from 10N to 20N is causing convection, described in the Monsoon Trough section above. From 15N to 20Nbetween 112W and 122W, fresh winds are associated with thistrough. The rest of the tropical eastern Pacific is under the influence of modest ridging, leaving winds mainly gentle, andseas moderate. For the forecast, the weak cold front in NW waters will drift Sthrough Mon, then dissipate. Large NW swell will arrive to the NW waters late today with seas peaking around 12 ft Mon. Rough seas will reach E to 122W and S to 10N Tue and Tue night, beforedecaying into late week. $$Konarik