000 AXPZ20 KNHC 132114 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Thu May 13 2021 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 1800 UTC surface analysis and satellite imagery through 2100 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Building high pressure in the Gulf of Mexico will support gale force winds in the Tehuantepec region through Fri afternoon. Seas will build to 8-10 ft with these winds. Gale force winds will diminish by Fri afternoon with fresh to strong northerly winds persisting into early Sat before diminishing. Please read the latest High Seas Forecast issued by the National Hurricane Center at website: https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from near 07N78W to 05N85W to a 1010 mb low near 10N116W. The ITCZ continues from 10N116W to beyond 08N140W. Scattered moderate convection is noted from 05N to 13N between 92W and 110W and within 270 nm S of the low. Scattered showers prevail along the ITCZ. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see the Special Features section for details on a Gulf of Tehuantepec Gale Warning. Along Baja California, northerly gentle to moderate winds are noted with light winds across the Gulf of California. Seas range 5-7 ft in NW swell with 3 ft or less in the Gulf of California. Elsewhere, light and variable winds prevail. Hazy/smokey conditions are possible near the coast south of Cabo Corrientes to the Tehuantepec region. For the forecast, fresh southerly winds will pulse in the northern Gulf of California this weekend, except fresh to strong Fri night and Sat night as a pair of troughs move through the area, building seas temporarily to 3-5 ft. Gentle to moderate winds will prevail elsewhere. A moderate NW swell will subside in the waters west of Baja California through tonight, with another set arriving on Sat. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong winds are in the Papagayo region, while gentle to moderate winds prevail elsewhere. Seas are in the 3-5 ft range in mixed long period NW and SW swell, except 5-7 ft offshore of Ecuador and in the Papagayo region. For the forecast, moderate to fresh winds will prevail in the Papagayo region, pulsing to fresh to strong during the overnight hours through Sat night. Seas may occasionally build to 8 ft with the strongest winds. Gentle to moderate winds will prevail elsewhere. A set of southerly swell is expected to arrive by Fri, with a larger, reinforcing set this weekend. REMAINDER OF THE AREA... A broad surface ridge covers the waters north of the ITCZ. Gentle to moderate trades dominate the open waters of the tropical eastern Pacific, along with seas in the 5-8 ft range in long period, mixed northerly and southerly swell. The highest seas are found west of 125W and south of 11N. For the forecast, fairly tranquil marine conditions with moderate trades will prevail through the remainder of the week and weekend with trades locally to fresh at times. Southerly swell crossing the equator will maintain seas to 7 ft across the southern waters through Fri. A reinforcing set of southerly swell will east of 120W this weekend which will maintain seas to 5-7 ft south of 10N and east of 120W. Otherwise, seas will locally reach 8 ft in fresh trades. $$ ERA