Tropical Storm Harvey formed in the Atlantic Thursday, according to the National Hurricane Center in Miami.
Harvey had maximum sustained winds of 40 mph as it moved west at 18 mph. The storm was about 250 miles east of Barbados and 355 miles east of St. Lucia.
A tropical storm warning was in effect for Martinique, St. Lucia, Barbados, St. Vincent and the Grenadines. A tropical storm watch was in effect for Dominica.
Harvey was expected to move through the Windward Islands and into the eastern Caribbean Sea on Friday. Slow strengthening is possible over the next two days.
Regional airline LIAT canceled flights Thursday in and out of Barbados and elsewhere in the eastern Caribbean.
The government of Barbados directed public agencies and the public bus service to shut down early Thursday. The Chamber of Commerce and Industry urged all retail businesses to gradually close down in anticipation of the storm.
The storm doesn't pose a threat to South Florida.
Harvey is the eighth tropical storm of the 2017 Atlantic hurricane season.