In mid-August 2011, a westward moving tropical wave entered the Caribbean Sea. It eventually gained enough organisation to be classified as Tropical Depression Eight on 18 August. As reported by the National Hurricane Centre (NHC), this system evolved into a Tropical Storm on 19 August at approximately 0600 UTC when it was situated 250km east of Roatan, Honduras. Now officially recognised as the eighth cyclone of the 2011 Atlantic hurricane season, the name Harvey was assigned to this storm.