000 AXNT20 KNHC 080551 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 0605 UTC Mon Mar 8 2021 Tropical Weather Discussion for North America, Central America Gulf of Mexico, Caribbean Sea, northern sections of South America, and Atlantic Ocean to the African coast from the Equator to 32N. The following information is based on satellite imagery, weather observations, radar and meteorological analysis. Based on 0000 UTC surface analysis and satellite imagery through 0530 UTC. ...SPECIAL FEATURES... Atlantic Gale Warning: A cold front that extends from 32N62W to the southern Bahamas to eastern Cuba near 21N77W. An ASCAT pass from 0000 UTC revealed ongoing gale-force conditions north of 27N and on the western edge of a 1011 mb low pressure center located along the cold front, near 30N67W. The cold front will move SE through Mon, while the low slides NE along the front and deepens across the western Atlantic through tonight. High pressure NW of the region will act to increase northerly winds behind the front. Gale conditions will lift N of the area by Mon morning. Caribbean Gale Warning: High-pressure building behind a cold front moving SE across the western Atlantic the next few days will increase the pressure gradient across the south-central Caribbean tonight through midweek. Winds within 90 nm of the coast of Colombia are expected to increase to gale force Mon night, and then again Tue night. Seas will reach 12 ft or higher during the period of peak winds. For more information, please refer the Atlantic High Seas forecast issued by the National Hurricane Center at website: https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml. A cold front extending from central Cuba SW to Belize adjacent waters will reach Hispaniola Mon night and stall over the island through Tue evening. Heavy rainfall is forecast with the potential for flooding. ...MONSOON TROUGH/ITCZ... The monsoon trough extends off the coast of W Africa near 10N14W to 04N20W. The ITCZ continues from 04N20W to 02N27W to the coast of Brazil near 02S40W. Scattered moderate convection from 00N-07N between 15W-26W. GULF OF MEXICO... Strong high pressure building along the eastern United States extending a ridge SW into the gulf which is currently supporting NE moderate to fresh winds over the eastern half of the basin and gentle to moderate NE to E winds W of 90W. Seas are 5 to 8 ft E of 90W, the highest seas being in the SE portion of the gulf where strong NE winds are developing. In the western half of the basin, seas range between 3 to 6 ft. Strong dry air subsidence continues to support mainly clear skies, except over the far western gulf W of 94W where shallow moisture and diffluent flow at the lower levels support a line of showers along the coast and adjacent waters of Mexico. In the wake of a cold front high pressure will build into the Gulf early this week. This will result in strong NE to E winds across the SE Gulf and Florida Straits. By Thu, SE return flow will develop across the northern and western Gulf. CARIBBEAN SEA Please see the Special Features section for details on the Gale Warning in effect for the south-central Caribbean Sea near the the coast of Colombia. A cold front extends across central/eastern Cuba SW to waters adjacent to Honduras. There is no convection associated with this front at the time. Moderate to fresh winds behind the front will increase to fresh to strong N to NE winds tonight as the front continue to move SE into Mon evening. The front is forecast to stall from the Dominican Republic to Honduras Mon night through Tue evening, potentially bringing heavy rain and flooding to Hispaniola. Mainly NE moderate to fresh winds are ahead of the front, while moderate to fresh trades are occurring over the central and eastern Caribbean, with locally strong winds near the Colombian coast. These conditions will prevail through Thu, with fresh to locally strong winds expanding in areal coverage Tue and Wed. Strong high pressure building behind the cold front will bring strong to near gale force winds affecting the Windward Passage and Jamaica adjacent waters Mon through Wed. Of note... A robust wet pulse of the Madden Julian Oscillation is generating numerous showers and thunderstorms over most of Colombia. Week-long periods of intermittent heavy rains are expected over Ecuador, Colombia, and northern Peru. Rainfall totals of 200-300 mm (8-12 in) are expected in coastal Ecuador and SW Colombia, and 100-200 mm (4-8 in) of rainfall are expected over northern Peru and the Eje Cafetero region of Colombia. Please refer to the forecasts of your local meteorological offices for more details. ATLANTIC OCEAN Please see the Special Features section for details about an ongoing Gale event in the western Atlantic. Scattered showers and thunderstorms are within 150 nm east of the cold front associated with the 1011 mb low extending from 32N62W to the southern Bahamas to eastern Cuba near 21N77W. Strong N wind behind the front will prevail through Mon night as the low moves NE and out of the area. By Tue, the front will stall from 22N65W to the Dominican Republic. Strong high pressure will build north of the front and support strong NE winds south of 27N into Wed night. The remainder of the basin is under the influence of the Azores high, which is supporting a large area of fresh to strong trade winds east of 50W. Seas are 7 to 12 ft with a component of longer period NW swell. $$ Mora