Right now, Debby is located about 1100 miles west of the Azores Islands.
Debby is forecasted to remain a tropical storm through early Wednesday.
It will likely weaken to a tropical depression later this week as it moves north over cooler waters in the Atlantic. Debby will not be a threat to land.
A subtropical storm is a hybrid of a tropical and non-tropical system.
Subtropical storms usually have winds that are spread out farther from the center, and they are often asymmetric.