The tropical wave approaching the Lesser Antilles is officially Tropical Storm Don.
An Air Force Reserve reconnaissance plane is scheduled to investigate the disturbance Monday afternoon, if necessary.
Details about the current winds and direction will be available after 5 p.m., the hurricane center said. It will be battling dry air and strong wind shear over the Caribbean, which will likely hinder further tropical development.
The system colored in yellow on the above map, dubbed Invest 96L, is an area of disturbed weather located about 800 miles west-southwest of the Cabo Verde Islands.
Brewing Caribbean storm could become tropical cyclone in two days
The NHC said some gradual development of that system is possible over the next few days while it moves slowly toward the west-northwest or northwest over the open Atlantic Ocean.
Chances of formation over the next 48 hours were 30 percent, with a 40 percent chance over the next five days. It is about 500 miles east-southeast of Barbados and is expected to continue moving west between 15 to 20 mph.
Hurricane Fernanda remains in the Eastern Pacific and is now located an estimated 1645 miles ESE of Hilo, Hawaiʻi.More news: Fuel prices in North Korea surge after China cuts oil sales