000 AXPZ20 KNHC 060925 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Fri Nov 6 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 0900 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Northerly gales continue across the Gulf this morning. Peak seas are estimated at 16 ft. Swell generated from this event will produce a large area of high seas that will extend to near the equator. Winds will diminish today, and dropping below gale force this afternoon. Refer to the latest High Seas Forecast issued by the National Hurricane Center at: https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for details. Heavy Rainfall: The circulation associated with Tropical Depression Eta is producing a surge of moist southwesterly flow across the tropical eastern Pacific that will support heavy rainfall across portions of Central America today, which may cause life-threatening flash flooding and river flooding across portions of Central America, along with landslides in areas of higher terrain. Please refer to statements provided by your local national meteorological agency for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 12N93W to 10N124W. The ITCZ continues from 10N124W to beyond 09N140W. Scattered moderate isolated strong convection is noted from 08N to 12N between 135W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please refer to the Special Features section above for details on the Gulf of Tehuantepec Gale Warning. Scatterometer data shows moderate NW winds west of Baja California, and light to gentle winds farther south, outside of the Tehuantepec area. Seas are 6-7 ft near the Revillagigedo Islands, and 7 ft SW of Baja California Sur. Elsewhere, seas are 4 to 6 ft in NW swell north of 20N, and SW swell south of 20N. A strong cold front will sweep into Baja California Norte later today, and induce fresh to strong westerly gap winds in the northern Gulf of California late tonight through Sat night. NW swell will also follow the front, with combined seas in excess of 8 ft encompassing the waters off Baja California through Sun, reaching the area near Socorro Island by late Sun. Peak seas may reach as high as 17 ft off northern Baja California Norte by Sun. Gentle winds will persist south of Cabo Corrientes outside of the Gulf of Tehuantepec plume, with seas of 4 to 6 ft in mostly southerly swell. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Tropical Depression Eta centered over the Gulf of Honduras near 17.3N 87.4W at 0900 UTC moving N at 7 kt. Estimated minimum central pressure is 1004 mb. Maximum sustained winds are 30 kt with gusts to 40 kt. Scatterometer satellite data showed areas of fresh southwesterly winds west of the coasts of Costa Rica, Nicaragua and El Salvador. Eta will lift slowly northward, which will allow winds and seas to diminish through tonight. Meanwhile, complex seas of up to 12 ft persist off the rest of the offshore waters of El Salvador and Guatemala, in a mix of swell emerging from the prolonged gale event in the nearby Tehuantepec region, and longer period SW swell. Fresh SW winds and 8 to 10 ft seas in SW swell persist off the coast of western Panama and Costa Rica. Better marine conditions are noted off eastern Panama and the coast of Colombia. Winds and seas will diminish today off Panama and Costa Rica, and the swell from the Tehuantepec gap event will begin to subside as well. However, fresh to occasionally strong onshore SW winds off Nicaragua will persist today, maintaining 8 to 10 ft seas with SW swell. These winds will diminish by Sat, and seas will subside to less than 8 ft by Sun. Moderate SW winds and 4 to 6 ft seas in SW swell will prevail by Mon. REMAINDER OF THE AREA... Post-tropical Cyclone Odalys 1008 mb is centered near 18.5N125W. The sheared center of Odalys is completely exposed. Odalys will continue moving westward during the next 24 hours and weaken to a remnant low today as it reaches cooler waters and drier more stable air. Ridging dominates north of 20N, anchored by strong high pressure well north of the Hawaiian Islands. Moderate to fresh NE trade winds persist from 10N to 28N, outside of Odalys, west of 120W. A large envelope of seas greater than 8 ft surrounds Odalys, and an area of 8 to 9 ft seas also persists west of Odalys, from 17N to 22N to beyond 140W, due to a mix of SW swell and wind waves. Odalys will dissipate as it moves westward across the area through Sat. Meanwhile, a strong cold front will push southward, then stall and dissipate near 20N by Sat night. Fresh to strong N to NE winds will accompany the front as it crosses 30N, along with large NW to N swell. This swell will mix with the lingering swell from Odalys and produce seas greater than 8 ft for most of the area north of 12N and west of 110W by early next week. Farther east, seas greater than 8 ft in a mix of SW swell and NE swell emerging out of Tehuantepec dominate the waters mainly south of 14N and east of 115W. This area of seas will rapidly subside through Sat to below 8 ft in SW swell as the Tehuantepec gale event begins to wind down. $$ Mundell