If more than 21 tropical cyclones occur during a season, WMO refers to the list of Greek alphabet names: Alpha, Beta, Gamma, Delta and so on.
Haddii ay dhacdo in hal xilli ay dhacaan 21 duufaanood, oo magacyadii loo diyaariyey ay dhamaadaan markaas waxaa la isticmaalaa Xarfaha Giriiga "Greek Alphabet" sida (alfa/alpha, beta, gamma, delta iyo wax la mid ah).