Tropical Storm Delta (2005)
On November 22, a non-tropical low pressure system in the central Atlantic Ocean began to gain some tropical characteristics. Late that afternoon the low became Subtropical Storm Delta, while located over 800 miles (1300 km) west-southwest of the Azores. Originally, the National Hurricane Center thought that the storm had already gained enough tropical characteristics to be classified as a regular tropical storm, but in post-storm analysis this was changed.