The 1856 Atlantic hurricane season was a deadly Atlantic hurricane season that featured six tropical cyclones. The first system, 1856 Last Island hurricane, was first observed in the Gulf of Mexico on August 9. The final storm, Hurricane Six, was last observed on September 22. These dates fall within the period with the most tropical cyclone activity in the Atlantic. The season also had an accumulated cyclone energy (ACE) rating of 48.96. Only two tropical cyclones during the season existed simultaneously. Five of them struck land, while one of the cyclones has only a single known point in its track due to a sparsity of data. Operationally, another tropical cyclone was believed to have existed in the Wilmington, North Carolina, area in September, but HURDAT – the official Atlantic hurricane database – excludes this system. Another tropical cyclone that existed over the Northeastern United States in mid-August was later added to HURDAT. 6 storms, 4 hurricanes, 2 major hurricanes (Category 3+). Strongest: an unnamed storm (150 mph). Accumulated cyclone energy ≈ 49. Wiki link