Tropical Depression One (2009)
When the storm became Tropical Depression One on May 28, it was the third time since 1851 that an Atlantic tropical cyclone formed before June 1, the official start of an Atlantic hurricane season. The depression followed Subtropical Storm Andrea of May 2007 and Tropical Storm Arthur of May 2008. The first time this event happened was in 1932, 1933, and 1934; the second time it happened was in 1951, 1952, and 1953. The National Hurricane Center also reported that Tropical Depression One was also the farthest north a May tropical cyclone has ever formed.