Where is Tropical Storm Dexter? Atlantic hurricane season is June 1 to Nov. 30, 2025, with most tropical storm activity between August and October.

Tropical Storm Dexter formed Sunday night. The system started as an area of interest late last week and it rapidly developed into a tropical storm with 45 mph wind speeds upon the first advisory issued at 11 p.

Dexter was a tropical storm in the North Atlantic Ocean late Sunday Eastern time, the National Hurricane Center said in its latest advisory. Dexter is the fourth named storm to form in the Atlantic in 2025. It was not expected to be an immediate threat to land.