000 AXNT20 KNHC 122336 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 736 PM EDT Wed Apr 12 2017 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 1800 UTC surface analysis and satellite imagery through 2315 UTC. ...SPECIAL FEATURES... A 1011 mb low is centered over the W Atlantic near 26N67W. Gale winds are within 180 nm N semicircle of the low with seas to 13 ft. Gale force winds are forecast until 13/1200 UTC. ...ITCZ/MONSOON TROUGH... The Monsoon Trough extends across the western Africa coast near 09N13W to 03N22W. The Intertropical Convergence Zone continues from 03N22W to 01S35W to the coast of South America near 03S42W. Scattered showers are within 90 nm of the Monsoon Trough and ITCZ axis. ...DISCUSSION... GULF OF MEXICO... Broad surface ridging is over the Gulf of Mexico with 10-15 kt easterly flow. Embedded scattered showers are moving W across central and south Florida, and the SE Gulf, from the Atlantic. More scattered showers are over NE Mexico N of Tampico, and S Texas, also moving W. In the upper levels, a ridge is over the W Gulf of Mexico with axis along 97W. A small upper level trough is over N Florida. Upper level moisture is over S Texas and the NW Gulf. Strong subsidence is over the remainder of the Gulf. Expect over the next 24 hours for scattered showers to continue to move W over the Gulf. CARIBBEAN SEA... 15-20 kt tradewinds are over the Caribbean Sea with the weakest winds just S of Cuba, and the strongest winds along the coast of Colombia. A tail end of a surface trough is over Puerto Rico. Radar imagery shows the showers reaching the Virgin Islands. Similar showers are the Leeward Islands. Elsewhere, scattered showers are over N Colombia, Costa Rica, Nicaragua, Honduras, Guatemala, Jamaica, and Hispaniola. In the upper levels, zonal flow is over the Caribbean Sea. Upper level moisture is over N Colombia and Venezuela. Strong subsidence is over the remainder of the Caribbean. Expect over the next 24 hours for the E Caribbean to continue to have scattered showers due to the surface trough. ...HISPANIOLA... Presently scattered showers are over Hispaniola due to the surface trough. Expect Haiti to have less showers over the next 24 hours. ATLANTIC OCEAN... A quasi-stationary front is over the W Atlantic from 31N40W to 27N50W to 29N66W. Scattered showers prevail within 120 nm of the front. Further south, 1011 mb gale low is centered near 26N67W. A surface trough extends S from the low to Puerto Rico near 18N66W. Scattered showers are N of 18N between 60W-66W. A 1020 mb high is over the central Atlantic near 27N31W. Another 1021 mb high is over the E Atlantic N of the Canary Islands near 30N16W. Of note in the upper levels, an upper level low is over the E Atlantic near 27N68W. An upper level trough is N of 20N between 10W-35W. Expect over the next 24 hours for the W Atlantic front to remain quasi- stationary with continued scattered showers. Also expect the W Atlantic gale low to drift W towards the Bahamas with continued scattered showers. For additional information please visit http://www.hurricanes.gov/marine $$ Formosa