000 AXNT20 KNHC 281205 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 805 AM EDT Thu Jun 28 2018 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 0600 UTC surface analysis and satellite imagery through 1100 UTC. ...TROPICAL WAVES... A tropical wave is in Africa, still, along 13W/14W from 17N southward. Clouds and precipitation: broken to overcast multilayered clouds from 03N to 18N between 10W and 20W. isolated moderate rainshowers from 05N to 09N between 11W and 17W. An Atlantic Ocean tropical wave is along 32W/36W from 20N southward, moving westward 10 to 15 knots. Any precipitation appears to be more related to the ITCZ. An Atlantic Ocean tropical wave is along 56W/58W from 20N southward, moving westward 10 to 15 knots. Any precipitation appears to be more related to the ITCZ. A Caribbean Sea tropical wave is along 81W/82W from 20N southward, moving westward 10 to 15 knots. Precipitation: scattered moderate to strong rainshowers are in the SW corner of the Caribbean Sea, from 10N to 12N between 80W and 84W in SE Nicaragua. Isolated moderate to locally strong rainshowers are from 10N southward between the coast of Colombia and 80W near Panama. A tropical wave is moving through the SW corner of the Gulf of Mexico, along 95W in the Isthmus of Tehuantepec of southern Mexico. Precipitation: isolated moderate rainshowers are from 23N southward between 90W and Mexico. ...MONSOON TROUGH/ITCZ... The monsoon trough passes through the coastal sections of Guinea near 10N14W, to 08N20W 06N33W and 05N42W. The ITCZ continues from 05N42W to 05N53W, at the coast of French Guiana. ...DISCUSSION... GULF OF MEXICO... See the Tropical Waves section above for details on the wave progressing west through the Bay of Campeche. A surface ridge prevails across the northern portion of the Gulf, anchored by a 1018 mb high centered near 25N83W. With this, a gentle to moderate anticyclonic flow dominates the Gulf waters. A surface trough will develop during the late afternoons and early evenings over the Yucatan Peninsula, then shift westward across the southwest Gulf waters during the overnight hours and dissipate by late each morning. The trough will be accompanied by a fresh to locally moderate wind shift each night. CARIBBEAN SEA... See the Tropical Waves section above for details on the wave progressing west through the west Caribbean. Moderate to fresh winds are noted across the west Caribbean, mainly east of the tropical wave from 11N to 18N between 68W and 82W. These winds will diminish from the north, but continue across the southwest Caribbean this week. Nocturnal winds will pulse to fresh to strong through tonight in the Gulf of Honduras. ATLANTIC OCEAN... A broad surface ridge dominates across the tropical North Atlantic from 27N near the Bahamas to near 30N in the far eastern Atlantic. Weak surface troughs are located near 32N47W and 31N33W with minimal convection and no significant winds. Three tropical waves are moving across the tropical Atlantic. Refer to the section above for more information. Moderate to fresh trades are noted across the tropics with little change forecast this week. Moderate winds are forecast for the next few days during the late afternoons into the early evening hours along the north coast of Hispaniola. For additional information please visit http://www.hurricanes.gov/marine $$ MT