Tropical Weather Discussion

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Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Wed Apr 22 2026 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 0000 UTC surface analysis and satellite imagery through 0340 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A trough axis extends from near 08N78W to 08N83W to 05N90W to 05N100W. The ITCZ stretches from 05N101W to 02N123W and beyond 05N140W. Scattered moderate convection is observed from 00N to 07N between 84W and 94W, and from 02S to 08N between 110W and 132W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A weak cold front started to move across the Baja California Norte tonight while a broad surface ridge prevails. The broad ridge is yielding moderate to locally fresh NW to N winds across the Baja waters. In the northern Gulf of California, moderate to fresh SW winds are ahead of the front. Seas across the Baja offshores are 4-7 ft in S swell south of Punta Eugenia and NW swell N of 27N. In the Gulf of Tehuantepec, winds are moderate to fresh and seas to 6 ft. Elsewhere, winds are moderate or weaker and seas 4-7 ft in S swell. For the forecast, high pressure extending across the Gulf of America will begin to weaken tonight through Wed as the high shifts northeastward, leading to a significant decrease in gap winds across the Gulf of Tehuantepec tonight through Wed. Elsewhere, a weak cold front moving across Baja California Norte will move southeastward through tonight then dissipate Wed morning. New high pressure behind this front will build across the Baja waters Wed and Thu, and act to increase winds modestly through early Fri before weakening into Fri night. New NW swell generated behind the front will move into the Baja California Norte waters tonight and spread southeastward to the Revillagigedo Islands through Wed night. Seas are expected to peak to around 8 ft across north and central portions of the Baja waters with this swell. Elsewhere, mostly light to gentle west to northwest winds are expected through the end of the week and into the upcoming weekend. ....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Modest high pressure north of the western Caribbean Sea is forcing fresh NE to E gap winds and moderate seas across the Papagayo region, extending downstream to 87W. Seas there are 5 to 6 ft. Farther east, moderate N to NE winds are occurring in the Gulf of Panama. Seas in these waters are 5 to 6 ft in SW swell. Elsewhere, light to gentle variable winds prevail. For the forecast, gap winds will pulse moderate to fresh speeds across the Papagayo region tonight into Wed morning, then become light variable through the weekend. Similarly, winds will pulse to moderate in the Gulf of Panama tonight into Wed morning before also becoming light to gentle the rest of the week. Otherwise, rather tranquil conditions are expected to continue over the Central American and the equatorial waters through the end of the week. The next significant SW swell is forecast to approach the area waters over the upcoming weekend. ...REMAINDER OF THE AREA... A weakening cold front continues to slide southeastward across the northern waters, extending from 30N118W to 25N124W, then becomes stationary and stretches to 21N140W. No significant convection is seen near this boundary. Large NW swell follows the front, supporting seas of 8-9 ft. High pressure well NW of the front extends weakly into the area and is producing light to gentle anticyclonic winds behind the front N of 20N. Weak high pressure SE of the front dominates the remainder of the basin, supporting moderate to locally fresh easterly trade winds between 110W and 140W. Moderate seas to 7 ft in S swell, prevail between the front and the ITCZ. Elsewhere, moderate or lighter winds and moderate seas are prevalent. For the forecast, the aforementioned frontal boundary will move east-southeastward, further weakening tonight and dissipating as it moves into the central Baja waters on Wed. The NW swell behind the front will spread southeastward over the next few days, reaching the trade wind zone Wed evening, and leading to rough seas around 8 ft there Wed night through Thu night. Little overall changes are expected with winds and seas elsewhere through Thu.