Tropical Storm Six of 1961 on September 15th. Despite a shape that resembles the spiral bands of a normal hurricane, "Six" would dissipate later in the day while racing north. Source: http://docs.lib.noaa.gov/rescue/mwr/090/mwr-090-08-0351.pdf

The NOAA emblem is the property of the U.S. Government and a trademark of the United States Department of Commerce.

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