836 AXNT20 KNHC 300527 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 127 AM EDT Mon Jul 30 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 0000 UTC surface analysis and satellite imagery through 0515 UTC. ...TROPICAL WAVES... A tropical wave extends over the Cabo Verde Islands along 25W from 07N-22N, moving westward at 10-15 kt. A 700 mb trough is noted with this wave, and model guidance supports its location. Isolated moderate convection is along the coast of W Africa from 08N- 12N between 13W-17W. A tropical wave is over the east Atlantic with axis extending from 05N-22N along 38W, moving westward at 10-15 kt. A 700 mb low is centered near 21N38W over the northern portion of the wave axis. Intrusion of Saharan dry air and dust is hindering convection with this wave. A tropical wave is over the E Caribbean with axis extending from 05N-21N along 61W, moving westward at 20 kt. Intrusion of Saharan dry air and dust to the wave's environment is hindering convection with this feature N of 12N. Widely scattered moderate convection is inland over Venezuela from 04N-09N between 59W-64W. A tropical wave is over the central Caribbean with axis extending from 09N-20N along 76W, moving westward at 20 kt. Widely scattered moderate convection is over E Cuba and Jamaica. Similar convection is inland over N Colombia from 05N-11N between 73W-78W. A tropical wave is over the Bay of Campeche with axis south of 21N along 95W, moving westward at 20 kt. Widely scattered moderate convection is within 150 nm of the wave axis to include over S Mexico. ...MONSOON TROUGH/ITCZ... The monsoon trough extends from the coast of Africa near 12N16W to 09N31W. The ITCZ extends from 09N31W to 08N37W. The ITCZ resumes W of a tropical wave near 08N40W and continues to the coast of South America near 07N58W. Scattered showers are within 120 nm of the ITCZ between 45W-58W. ...DISCUSSION... GULF OF MEXICO... A weak surface ridge extends across the basin along 28N. 5-10 kt variable winds prevail over most of the Gulf waters. Scattered moderate convection is over the N Gulf N of 29N E of 94W. A surface trough is over the Florida Peninsula and the SE Gulf from 27N81W to 24N85W with scattered moderate convection within 90 nm of the trough. In addition, scattered moderate to isolated strong convection is over the Yucatan Peninsula due to a surface trough. Expect convection to increase over the E Gulf through mid-week. CARIBBEAN SEA... Shallow moisture prevails across the NW basin; and two tropical wave are moving across the Caribbean. Refer to the section above for details. A divergent environment aloft is supporting widely scattered moderate convection over western Cuba and adjacent waters north of 20N. In the southwest Caribbean, the EPAC's monsoon trough supports scattered moderate convection over Costa Rica and Panama and waters south of 11N between 78W-86W. Elsewhere, scattered moderate to isolated strong convection is inland over Honduras, El Salvador, and Nicaragua. Fresh to strong winds are forecast to pulse every night over the south- central basin through mid-week. ATLANTIC OCEAN... Two tropical waves are moving across the basin. Please refer to the section above for details. Diffluent flow between the base of an upper-level trough over the southeast CONUS continues to support widely scattered moderate convection over the W Atlantic to include the Bahamas W of 75W. The Atlantic subtropical ridge dominates the remainder of the basin being anchored by a 1030 mb high centered near 36N46W. Surface ridging will dominate the central and eastern Atlantic through the weekend providing stable and dry conditions. For additional information please visit http://www.hurricanes.gov/marine $$ Formosa