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Tropical Storm Fiona weakened on Friday afternoon while a new tropical wave was being watched to the south. (National Hurricane Center)

A weaker Tropical Storm Fiona continued to move northwestward in the central Atlantic on Friday afternoon, but attention was turning to a disturbance to its south.

The tropical wave in orange could become a depression by next week. (National Hurricane Center)

That tropical wave, Invest 99L, was located about 600 miles southwest of the Cabo Verde Islands on Friday afternoon, according to the National Hurricane Center.

It appeared disorganized but the hurricane center said that environmental conditions would eventually work in its favor and a tropical depression could form early next week.

Invest 99L was moving west at about 15 mph.

Its long-range track keeps it on a westward path, which could take it into the Caribbean next week, so it will bear watching.

The hurricane center gave it a 50 percent chance of becoming a tropical depression in the next five days.

The next name on the storm list is Gaston (ga-STAWN).

Tropical Storm Fiona was expected to weaken further and could become a depression soon. (National Hurricane Center)

Meanwhile, Tropical Storm Fiona continued to move northwest in the central Atlantic while losing a little steam.

As of 4 p.m. CDT, Fiona, the sixth named storm of 2016, was located about 1,355 miles west of the Cabo Verde Islands and was moving west-northwest at 10 mph.

Fiona had winds down to 40 mph and was expected to continue to weaken over the weekend thanks to increasing wind shear and dry air in its vicinity.

Fiona was forecast to continue to move to the northwest, but it was uncertain how long it could hold together.

Forecasters adjusted its track slightly to the west but still didn't expect it to affect land.

There was a third area being watched in the tropics as well on Friday.

The hurricane center said a tropical wave was expected to emerge off the west coast of Africa on Saturday and could gradually develop as it moves to the west-northwest in the eastern Atlantic.

The hurricane center said that wave had a 30 percent chance of development over the next five days.

The Atlantic hurricane season reaches a statistical peak on Sept. 10, and ends on Nov. 30.