000 AXPZ20 KNHC 130210 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 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 0000 UTC surface analysis and satellite imagery through 0150 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N74W to 08N80W to 09N114W to 08N127W. The ITCZ continues from 08N127W to 06N140W. Scattered moderate and isolated strong convection is noted from 07N to 10N between 93W and 98W, from 07N to 12N between 103W and 111W, and from 09N to 12N between 113W and 116W. Scattered moderate convection is noted from 04N to 07N between 88W and 91W, from 05N to 07N between 96W and 99W, from 08N to 10N between 118W and 122W, from 07N to 09N between 129W and 132W, and from 07N to 14N between 137W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Along Baja California, northerly gentle to moderate winds are noted with light winds across the Gulf of California, except moderate in the eastern portions of the southern Gulf. 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 or smokey conditions may be evident near the coast south of Cabo Corrientes to the Tehuantepec region, but a slight southerly component to the winds along with earlier late afternoon sea breezes are probably keeping most of these conditions confined to onshore for now. 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 moves through the area, building seas temporarily to 4-6 ft. Gentle to moderate winds will prevail elsewhere. A moderate NW swell will subside in the waters west of Baja California through Thu, with another set arriving Sat. Farther south, building high pressure in the Gulf of Mexico may allow strong to near gale- force gap winds in the Tehuantepec region Thu through Sat with building seas. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong winds are in the Papagayo region with gentle to moderate winds 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. 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... The trough that is the remnants of Andres is located SSW of the Revillagigedo Islands near 115W. Elsewhere, a broad and weak 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 120W and south of 10N, and along the equator between 110W to 120W. 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 8 ft across the southern waters through Fri. A reinforcing set of southerly swell will east of 120W this weekend which will build seas to 7-9 ft south of 10N and east of 120W. Otherwise, seas will be mainly in the 5-7 ft range, locally to 8 ft in fresh trades. $$ Lewitsky