Tropical Depression One was the first tropical cyclone of the 2009 Atlantic hurricane season. It was also the third tropical cyclone since 2007 to form before June 1. The storm formed on May 28, and moved across the Atlantic Ocean. Later that day, the storm started to weaken and fall apart. On May 29, the storm died and became a remnant low.
Before the storm became a depression, some parts of the storm brought light rainfall to the eastern tip of North Carolina. However there were no damages or deaths reported. Also the National Hurricane Center (NHC) did not give out any tropical storm watches or warnings for the storm.