I thought that hurricane names were done in sequence, so why would Florence come after Gordon?

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Dear Tom,
I thought that hurricane names were done in sequence, so why would Florence come after Gordon?
— Tom Gajda, Lincolnwood
Dear Tom,
Tropical cyclones are named in alphabetical order, and Florence was named during the early morning hours of Sept. 1 as it reached tropical storm strength off the west coast of Africa. Tropical Storm Gordon was named 48 hours later on Sept. 3 while passing through the Florida Keys, making Gordon immediately newsworthy as it impacted Florida and the Gulf Coast before making landfall near the Mississippi-Alabama border late Sept. 4. Since then, Florence strengthened to a Category 3 hurricane with 125 mph winds, weakened to a tropical storm and has now regained hurricane strength. The storm will dominate this week’s news cycle as it approaches the Eastern Seaboard as a major hurricane.
Florence was named during the early morning hours of Sept. 1 as it reached tropical storm strength off the west coast of Africa. Tropical Storm Gordon was named 48 hours later on Sept. 3.

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