* Naming shifts to Greek letters after 21-name list is exhausted * Texas coast prepares for tropical storm Beta So many powerful storms have formed over the Atlantic this year that for only the second time, the US National Hurricane Center (NHC) has run out of names, meaning it is now naming tropical storms and hurricanes with letters from the Greek alphabet. There are 21 names available each year. The list ends with those beginning with W and excludes Q, U, X, Y and Z. Once that list is exhausted, the nomenclature system switches to the Greek alphabet. Continue reading...