000 AXPZ20 KNHC 190845 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Sat Dec 19 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 0600 UTC surface analysis and satellite imagery through 0845 UTC. ...SPECIAL FEATURES... Gulf of Tehunatepec Gale Warning: Overnight scatterometer data indicated that gale conditions in the Gulf of Tehuantepec have diminished to fresh to strong while lingering seas are 8-10 ft. Fresh to strong winds will continue through Sun. A cold front will move across the Gulf of Mexico Sun inducing a new round of N gales over the Gulf of Tehuantepec Sun night through Tue. Seas will peak around 10-11 ft with the next gale event. Please read the latest NWS High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from northern Colombia near 10N74W to 06N86W to 06N101W. The ITCZ axis extends from 06N101W to 08N120W to 09N140W. Scattered moderate and isolated strong convection is noted from 04N to 06N between 78W and 81W, and within 180 nm to 240 nm north of the ITCZ between 116W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See Special Features for details about the Gulf of Tehuantepec Gale Warning. Gulf of California: A locally tight pressure gradient will support developing fresh to strong NW-N winds in the Gulf of California this afternoon, continuing through Sun before dissipating Sun night. Similar conditions are expected Wed afternoon and night behind the next cold front. Mainly moderate to fresh northerly winds elsewhere will diminish early next week as the pressure gradient across the region slackens. Long period NW swell W of Baja California will slowly subside through tonight. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong NE-E winds will pulse across the Papagayo region through the next several days as high pressure remains in place over the W Caribbean. Moderate to occasionally fresh N winds will pulse in the Gulf of Panama through this morning, strongest near the Azuero Peninsula. Gentle to moderate winds will prevail elsewhere. No significant swell events are forecast through early next week. REMAINDER OF THE AREA... High pressure north of the area extends across the waters north of the ITCZ. The moderate pressure gradient between the high and the the ITCZ is causing fresh to locally strong NE to E trades. Seas will peak around 8-11 ft today due to combined wind waves and NW swell. A cold front northwest of the area impinging on the high will allow the trades to weaken substantially Sun through Tue. A weak trough may develop over the west-central waters by mid-week increasing trades again slightly. No new large long-period swell is expected over forecast waters for the next several days. $$ Lewitsky