2011 Atlantic hurricane season
Hurricane Ophelia formed on September 20. Ophelia then became a remnant low five days later. On September 27, the storm began to build strength. It then became a category 1 hurricane on September 30. On the same day, it became a category 2 hurricane. The next day, the storm became a category 3 hurricane. On October 1, the storm became a category 4 hurricane. After wards, the storm weakened quickly and lost its tropical features on October 3.