tropical cyclones form in the Atlantic basin. At the end of the season, NHC director Gordon Dunn retired and was replaced by Robert Simpson. For the first time in 1967, the NHC tracked weaker, developing tropical disturbances, observing that 90% of systems do not develop. Tropical cyclogenesis – the process in which a tropical cyclone develops – resulted mainly from tropical waves, the Intertropical Convergence Zone (ITCZ), and decaying frontal systems. There were 30 tropical waves that exited the west coast of Africa at Dakar, Senegal, of which 14 became tropical depressions. Another 20 tropical disturbances originated offshore the Mid-Atlantic states, and 7 disturbances derived from cold-core lows. The first named storm – Arlene – did not form until August 28 and became a hurricane on September 2. At the time, only seven known seasons began later, although 1967 would the most active among these late starting seasons. The latency was caused by a stronger than normal ridge across the Atlantic Ocean, which suppressed convective activity across the basin and prevented the formation of strong low pressure areas. From June to October, the NHC tracked 26 tropical depressions, which is an area of disturbed weather that has a closed circulation and maximum sustained winds of less than . Eight of those depressions would go on to reach higher intensities. It was the first year that the NHC tracked the weaker depressions. Operationally, the agency followed and numbered 23 depressions, and discovered in a post-season analysis that another three systems became depressions. Eight depressions attained gale-force winds and were named from a sequential list, and six storms intensified to hurricane-strength – . Systems Tropical Storm One Satellite imagery and ship data indicated that Subtropical Depression Three formed at 18:00 UTC on June 14 to the northeast of the northeastern Bahamas, associated with an upper-level low. With a ridge to the northeast, the depression moved northwestward toward the Southeastern United States. Conditions were not favorable for strengthening, with cool air and minimal outflow, although the cyclone acquired gale-force winds by 12:00 UTC on August 16, becoming a subtropical storm. Shortly thereafter the system's circulation contracted, indicative of a transition to tropical status 12 hours later. An approaching cold front turned the system northeastward on June 18. At 02:00 UTC, the minimal tropical storm moved ashore near Little River Inlet, South Carolina, with winds of . Weakening to a depression as it headed