According to the National Hurricane Center's Tropical Prediction Center website, the World Meteorological Organization has six rotating lists of names that are used to identify Atlantic tropical cyclones, each of which contains twenty-one names. "Vince" is number 20 on this year's list.
That means we've had twenty named storms this year. And the season still isn't over yet. Yikes.
There's only "Wilma" left on the list for this year. After that?
In the event that more than 21 named tropical cyclones occur in the Atlantic basin in a season, additional storms will take names from the Greek alphabet: Alpha, Beta, Gamma, Delta, and so on.