000 AXPZ20 KNHC 010942 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Tue Dec 1 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 1030 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 will continue to support Storm force winds through the morning hours in the Gulf of Tehuantepec region. Seas will peak near 21 ft. Winds are forecast to diminish below gale force 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. 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 North of Colombia near 09N76W to 09N109W to 08N129W to 08N138W. Scattered moderate convection is from 07N to 15N between 93W to 121W. The ITCZ extends beyond 08N138W with limited convection. 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 a 1027 mb high pressure centered near 34N134W. 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 today building seas to 8-10 ft by tonight. Moderate to fresh northerly winds along the Gulf of California will prevail through Wednesday with seas ranging between 3 to 5 ft. Fresh to strong northerly winds return Thu with building seas in the 8 to 10 ft range. 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 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 10N131W to 17N129W. Scattered moderate 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. A new set of long period NW swell is entering the NW corner of the forecast region today building seas to 8-10 ft N of 11N and W of a line from 26N123W to 12N130W by this 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 into Thu. $$ Torres