Dexter, which formed into a tropical storm over the weekend, is weakening but could re-intensify later in the week, forecasters said.

Tropical Storm Dexter weakened slightly overnight, but is expected to strengthen a bit before dissipating later this week. Dexter became the Atlantic hurricane season's fourth-named storm off the coast of North Carolina on Aug.

Dexter became a tropical storm on Saturday night. As of late Monday, it was stirring up in the Atlantic Ocean about 345 miles north of Bermuda, the NOAA said. It had maximum sustained winds of 40 mph on Monday and was moving northeast.