000 AXPZ20 KNHC 302159 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Mon Nov 30 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 1800 UTC surface analysis and satellite imagery through 2145 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Storm Warning: A gap wind event continues over the Gulf of Tehuantepec as a strong cold front moves across the southeast Gulf of Mexico. High pressure building behind the front is already supporting gale force winds in the Gulf of Tehuantepec region. Winds will rapidly increase to a strong gale this afternoon, followed by storm force winds during the evening hours. Seas will peak near 23 ft tonight. Marine interest transiting across or in the vicinity of the Gulf of Tehunatepec should be aware of this upcoming gap wind event, and take necessary action to avoid these hazardous marine conditions over the affected waters. Winds are forecast to diminish below gale force on Tue evening. Please, see the latest High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 08N110W to 08N140W. Scattered moderate convection is from 04N to 09N east of 82W, from 06N to 13N between 94W and 120W and from 06N to 11N between 124W and 135W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A Storm Warning is in effect for the Gulf of Tehuantepec. Please, see Special Feature Section for more details. A ridge prevails across the offshore waters of Baja California, anchored by high pressure of 1030 mb centered near 33N130W. This is supporting gentle to moderate NW-N winds. Seas are in the 5-7 ft range. Long period NW swell will reach the waters N of Punta Eugenia by Tue building seas to 8-10 ft by Tue night. Moderate to fresh northerly winds along the Gulf of California will prevail through Tue evening with seas ranging between 3 to 5 ft. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong NE to E winds in the Gulf of Papagayo are expected through Thu morning with seas building to 9 ft. Mainly moderate to fresh NE winds will prevail the remainder of the forecast period. Seas generated by a strong gap wind event in the Gulf of Tehuantepec will propagate across the offshore waters of Guatemala and El Salvador tonight through Tue night. Elsewhere, moderate S to SW winds are expected S of the monsoon trough with mainly gentle easterly winds N of the monsoon trough. REMAINDER OF THE AREA... A ridge dominates the northern forecast waters and extends beyond the Revillagigedo Islands to near 18N111W. The pressure gradient between the ridge and lower pressure within the monsoon trough is supporting moderate to fresh NE to E winds north of 10N and west of 115W. Seas are generally 6-8 ft across this area. A surface trough is analyzed from 08N130W to 18N130W. Scattered moderate to isolated strong convection is in the vicinity of this elongated area of low pressure. Fresh to locally strong NE winds are from 12N to 17N between 125W and 133W with seas to 8 ft. Large NW swell will continue to propagate across the forecast waters. A new set of long period NW swell will reach the NW corner of the forecast region today building seas to 8-10 ft N of 11N and W of a line from 30N117W to 20N120W to 11N127W by Tue afternoon. Another and larger NW swell event will begin to propagate across the NW waters on Wed, with building seas of 12-16 ft W of a line from 30N133W to 20N140W by Wed night. $$ Ramos