000 AXPZ20 KNHC 081542 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Fri Apr 8 2022 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 1200 UTC surface analysis and satellite imagery through 1535 UTC. ...SPECIAL FEATURES... The pressure gradient between a strong high pressure over the southern US and the equatorial trough is supporting gale-force gap winds over the Gulf of Tehuantepec. On Sat, the area of high pressure will start to shift eastward. This will loosen the gradient across the Tehuantepec region, and veer winds over the western Gulf of Mexico. This will diminish winds below gale force by Sat evening. Seas will peak near 16 ft tonight into early Sat, subsiding below 8 ft by Sun morning. Seas generated from this gale-force gap wind event will spread far from the Tehuantepec region, with seas greater than 8 ft reaching as far west as 105W Sat. Please read the latest NWS High Seas Forecast issued by the National Hurricane Center at the website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from the border of Panama and Colombia near 07N78W to 06N88W to 07N97W. The ITCZ continues from 07N97W to 08N120W to beyond 07N140W. Scattered moderate to isolated strong convection is observed from 02N to 11N and E of 102W. Scattered moderate convection is present from 03N to 09N and between 105W and 125W, and from 05N to 08N and W of 130W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Please refer to the Special Features for details on the latest gale- force gap wind event in the Gulf of Tehuantepec. The subtropical ridge is located well northwest of the area and its influence extends southwest to the Revillagigedo islands. The weak pressure gradient results in gentle to moderate NW breezes across the offshore waters of Baja California. NW swell is producing seas of 5-8 ft in the region described. Moderate to locally fresh NW winds are present in the northern and central Gulf of California, while moderate or weaker winds are noted in the southern portion of the basin. Seas in the northern and central gulf are 2-4 ft and 1-2 ft in the southern part. Elsewhere outside of the Gulf of Tehuantepec, light to gentle winds and seas of 4-7 ft prevail in the remainder of the Mexican offshore waters. For the forecast, the gale-force winds in the Gulf of Tehuantepec will continue through Sat before diminishing. Northerly swell over the waters west of the Baja California peninsula will subside today. Another set of northerly swell will enter the waters off Baja California Norte on Sat. This swell will spread across the waters west of the Baja California peninsula through the weekend into early next week. Fresh to locally strong winds over the Gulf of California will diminish today. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Moderate to fresh trades continue across the Papagayo region to 89W. Seas in the area are 3-5 ft. Gentle to moderate S-SE winds are present in the waters between Ecuador and the Galapagos Islands. Seas are 5-7 ft. Elsewhere, including the Gulf of Panama, light to gentle winds and seas of 4-6 ft prevail. For the forecast, fresh to strong gap winds are forecast to develop in the Papagayo region tonight and continue into early next week. Mainly light to gentle winds are expected over the rest of the offshore waters through the end of the week, pulsing to moderate to fresh in the Gulf of Panama this weekend. NW swell associated with a gale-force gap wind event in the Tehuantepec region will propagate into the northern waters late Sat. Seas elsewhere will be mainly driven by a moderate S to SW swell. REMAINDER OF THE AREA A strong high pressure system of 1038 mb is located near 39N143W and dominates the eastern tropical Pacific outside of the deep tropics. Fairly tranquil weather conditions prevail across the region. The pressure gradient between the ridge and a weakening cold front just north of our area of responsibility results in fresh to strong NE winds behind a line from 30N128W to 22N140W. NW swell behind this line are producing seas of 8-10 ft. Fresh NE trades are found between 06N to 15N and W of 130W. Seas in this area are 6-8 ft. Elsewhere, gentle to moderate winds and seas of 5-8 ft are prevalent. For the forecast, high pressure will dominate the basin through the forecast period. The fresh to strong NE winds in the northwest portion of the tropical eastern Pacific will continue to spread southeastward through the weekend, primarily N of 20N. The associated seas will peak near 14 ft N of 25N this weekend. $$ DELGADO