Harmony sails from Port Canaveral, Symphony from PortMiami and Allure from Port Everglades.
As of Monday morning, a tropical storm warning was in effect for Barbados, St. Lucia and St. Vincent and the Grenadines, while Dominica, Martinique and Saba and St. Eustatius are under a tropical storm warning.
The National Hurricane Center in Miami has advised Puerto Rico, the US Virgin Islands and Hispaniola to monitor Dorian's progress.
No Carnival or NCL changes so far
All lines with Caribbean ships are keeping a close eye on Dorian.
Spokespersons for Carnival Cruise Line and Norwegian Cruise Line said there are no itinerary changes so far.
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