21. As a tropical wave , torrential rainfall occurred across Jamaica, causing mudslides and killing two people. 22. Meanwhile, a tropical wave will sweep northwestward through the Rio Grande Valley with several thundershowers. 23. Scattered thunder will also blossom near the Texas coast, as a tropical wave moves ashore. 24. Wednesday through Thursday . . . Next tropical wave to move across local area Wednesday. 25. Another cluster of thundershowers will accompany a tropical wave in the western Gulf of Mexico. 26. This was partially due to decreased tropical cyclogenesis from African tropical waves , which are 1962. 27. Hours later it degenerated into a tropical wave , marking its dissipating as a tropical cyclone. 28. Ernesto originated from a tropical wave in the Atlantic. 29. Hurricane Isabel formed from a tropical wave on September 6 2003 in the tropical Atlantic Ocean. 30. The tropical wave that later would become Dennis moved off the African coastline on August 5.