TAMPA, Fla. (WFLA) — A tropical depression or storm is likely to form soon, according to the National Hurricane Center.

NHC meteorologists said showers and thunderstorms continue to show signs of organization with a tropical wave located several hundred miles west-southwest of the Cabo Verde Islands.

The NHC said the system is likely to form over the next day or two as it moves westward toward the Windward Islands. It has a 90% chance of developing over the next seven days.

The NHC is also monitoring two other tropical waves, but both have a low chance of forming.

One of the systems is located over the western Caribbean Sea. It is producing widespread but disorganized shower and thunderstorm activities. “Some development of this system is possible over the northwestern Caribbean Sea or over the southwestern Gulf of Mexico during the next few days,” the NHC said.

The system has a 30% chance of forming over the next seven days.

Another tropical wave producing disorganized showers and thunderstorms is located a few hundred miles south-southwest of the Cabo Verde Islands.

The NHC said this system could slowly develop early next week as it moves westward across the central and western tropical Atlantic. It has a 20% chance of forming over the next seven days.