000 AXPZ20 KNHC 080300 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Fri May 8 2020 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 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 Panama near 09N79W to 06N82W to 08N110W. The ITCZ continues from 08N110W to 08N137W to 07N140W. Scattered moderate to strong convection is noted from 06N to 11N between 127W and 137W. Scattered moderate isolated strong convection is evident from 05N to 11N between 98W and 121W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Haze and areas of smoke from agricultural fires in Mexico may reduce visibilities near the coast from the Tehuantepec region to near Cabo Corrientes. High pressure across eastern Mexico will support near strong northerly gap winds across the Gulf of Tehuantepec overnight, with another round of near gale force gap winds possible Sun through Mon night. Seas will be 8 to 10 ft with both gap wind events. A N-S oriented ridge axis extends southward between 122W and 145W. Gentle to moderate winds were noted this evening across the waters outside of the Tehuantepec region. Strong winds offshore of southern California continue to produce 7 to 9 ft northerly swell west of Baja California. This swell will decay overnight. Gentle to moderate westerly breezes and 3 to 5 ft seas persist across the Mexican offshore waters south of 20N. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Haze and areas of smoke from agricultural fires in Central America may reduce visibilities near the coasts of Costa Rica, El Salvador and Guatemala. Fresh to occasionally strong gap winds are possible across the Papagayo region overnight. Elsewhere, gentle to moderate winds will prevail during the next several days. Large long period SW swell will reach the offshore waters of Central America, Ecuador and Colombia on Fri, then slowly decay through early next week. Seas will build to 8 to 11 ft with this swell event, with the highest SW of the Galapagos Islands. REMAINDER OF THE AREA... Northerly swell associated with strong northerly winds off the coast of southern California will continue west of Guadalupe Island, N of 25N and E of 128W, into early Fri before decaying. A N-S oriented ridge axis extends southward between 122W and 145W. This ridge is supporting moderate to fresh trades across most of the tropical Pacific north of the ITCZ. Seas are mainly 5 to 8 ft. Trade winds will diminish by Fri as the ridge weakens due to a decaying cold front which will approach 30N140W by the end of the week. NW swell associated with that front will reach 30N140W Fri evening with seas to 7 to 8 ft, then decay on Sat. Another cold front may reach 30N140W Sun night or Mon with another set of NW swell arriving in its wake. Southern Hemisphere long period SW swell is crossing the equator E of 129W, bringing seas of 8 to 11 ft S of 14N on Fri. This swell will subside across the tropics below 8 ft by early Sun as it propagates toward Central America and southern Mexico. $$ Mundell