"Showers and thunderstorms located over the Florida peninsula, the southeastern U.S. coast, the northwestern Bahamas, and the adjacent Atlantic and Gulf waters are associated with a broad trough of low pressure," the National Hurricane Center said.

For the present, all is quiet in the tropics, although repeated showers and thunderstorms are expected to impact much of Florida in the coming days.

If the storm becomes tropical later this week, it will be the first tropical storm of the Atlantic hurricane season.