From Nat'l Geo News:

To get a sense of just how turbulent the 2005 hurricane season has been, consider this: Forecasters may soon exhaust their list of pre- selected names.

Each year 21 common names are reserved for tropical storms. There are just four left for 2005: Stan, Tammy, Vince, and Wilma. After that, they go Greek—as in letters of the Greek alphabet: Alpha, Beta, Gamma, and so on.

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But then what do I know, I am but a mere caveman