--------------------------------------------------------------------------- TROPICAL WEATHER DISCUSSION (EASTERN PACIFIC AREA) MESSAGES T1T2: AX A1A2: PZ Date: 2026-04-18 --------------------------------------------------------------------------- Message File: T_AXPZ20KNHC180318_C_KWBC_20260418031912_38666572-1429-TWDEP.txt ****0000004459**** AXPZ20 KNHC 180318 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Sat Apr 18 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 0300 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from northwest Colombia southwestward to 07N90W to 05N110W. The ITCZ extends from 05N110W to 07N120W to 05N140W. A second ITCZ extends from 01.5S97W to 03S140W. Scattered moderate convection is depicted from 04S to 05N between 84W and 106W. Similar convection is depicted from 02.5N to 09N between 116W and 137W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A 1025 mb high pressure is centered near 34N132W the associated ridge extends to 14N and west of 111W. A dissipating stationary front dropping southeastward is analyzed over the California/northern Baja border at 32.5N116.5W to 27.5N115W. No significant winds and convective activity is present with this front. The pressure gradient in place is allowing for northwest moderate to fresh winds west of the Baja California Peninsula. Winds are gentle to locally moderate across the Gulf of California. Elsewhere over the Pacific, winds are moderate or weaker in speeds. Seas are 5 to 8 ft in northwest swell over Pacific waters northwest of Cabo Corrientes, 5 to 6 ft in south swell over the Pacific to the southeast of Cabo Corrientes, 2 to 3 ft in the Gulf of California, except for seas of 3 to 5 ft in the southern section and slightly higher seas of 5 to 7 ft in long- period south swell at the entrance to the Gulf. For the forecast, fresh to locally strong northwest winds will occur near Cabo San Lucas through early Sat. Northwest swell will briefly impact the waters west of Baja California Norte through early Sat. Otherwise, rather quiet conditions will remain over the Mexican offshores through the weekend. Looking ahead, high pressure building over the Gulf of America is expected to induce a strong to near gale Tehuantepec gap wind event beginning Sun night into Tue. Otherwise, high pressure will dominate the general weather pattern into the middle of next week. ....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gentle to locally moderate NE winds prevail in the Papagayo region. These winds reach westward to near 92W. Elsewhere, winds across the Central American and equatorial waters are moderate or weaker. Seas over the forecast waters are 4 to 6 ft in long- period south to southwest swell. Scattered moderate convection is observed from 04N to 06N between 83W and 87W. Scattered showers are over and near the Galapagos Islands. For the forecast, rather tranquil conditions are expected to remain over the Central American and the equatorial waters through early next week. ...REMAINDER OF THE AREA... High pressure of 1025 mb is analyzed north of the area at 34N132W, with a ridge extending southeastward to 14N and west 111W. A weak pressure gradient between the ridge and lower associated to the ITCZ is allowing for only moderate to locally fresh northeast trades over forecast waters. Seas are 5 to 7 ft in mixed swell, except for seas 8 to 9 ft north of 28N between 121W and 127.5W. No additional deep convection is occurring away from the surface trough/ITCZ. For the forecast, little change is expected in the winds during the next few days. Northwest swell producing seas to near 8 ft over the extreme northeast part, will decay early on Sat allowing for the seas to lower below 8 ft. Otherwise, little change in the seas are also expected through the weekend. Looking ahead, a cold front is expected to reach the northwest part of the discussion late Sat into early on Sun. The cold front will move southeastward while gradually weakening and accompanied by large northwest to north swell. The swell should reach near 20N and west of 126W by Tue late night. Seas to around 10 ft are expected with the swell. $$ KRV ########################### END OF MESSAGE SET ############################