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.

A tropical storm formed in the Pacific Ocean on Monday at the same time a different tropical storm was churning in the Atlantic Ocean but moving away from land, forecasters said. Tropical Storm Henriette was announced by the Miami-based National Hurricane Center.