The storm could make landfall along the southeastern Florida coast.
A Hurricane Warning is in effect for Vieques and Culebra, the US Virgin Islands, and the British Virgin Islands. A Hurricane Watch and a Tropical Storm Warning are in effect for Puerto Rico.
“Dorian should continue to move near or over the US and British Virgin Islands during the next several hours and then move over the Atlantic well east of the southeastern Bahamas on Thursday and Friday,” the National Hurricane Center said. “Dorian is forecast to strengthen and become a powerful hurricane during the next few days over the Atlantic waters.”