The naming of North Atlantic tropical cyclones is currently under the oversight of the Hurricane Committee of the World Meteorological Organization (WMO). This group maintains six alphabetic lists of twenty-one names, with one list used each year. This normally results in each name being reused every six years. However, in the case of a particularly deadly or damaging storm, that storm's name is retired, and a replacement starting with the same letter is selected to take its place. The decision whether to remove a name in a given season is made at the annual session of the Hurricane Committee in the spring of the following year.