Tropical Storm Leslie was a weak, short-lived tropical cyclone that was never well-organized; however, its precursor was costlier than any other tropical cyclone in the 2000 Atlantic hurricane season. The twelfth named storm of the season, Leslie formed on October 4 over eastern Florida as a subtropical cyclone, out of a trough of low pressure. Strengthening over open waters, it attained enough tropical characteristics to be reclassified as Tropical Storm Leslie on October 5. The storm reached peak winds of 45 mph (75 km/h) before wind shear weakened it, and on October 7 transitioned into an extratropical cyclone over the open Atlantic Ocean. Leslie lasted three more days before losing its identity.