Tropical Storm Sandy emerged in the southwest
Also, for now, it is not forecast to strengthen into a hurricane.
Meanwhile, a new depression formed in the Central Atlantic but poses little or no threat to land. It forecast to become Tropical Storm Tony either tonight or Tuesday and fizzle by Thursday.
At 5 a.m. Tuesday, Sandy, the 18th named storm of the season, was about 345 miles southwest of Kingston,
The system is predicted to angle northeast over Jamaica on Wednesday, move over
If that prediction holds, it would be about 400 miles east of Miami on Friday, its closest approach to the state.
The system still might come close enough to generate large swells, rough surf, gusty winds and heavy rains, starting on Thursday and continuing into the weekend, the National Weather Service in Miami said.
"As always, it's advised to not focus too much on the center location and eventual track, especially with late-season systems like this," he said, adding the large system might generate nasty weather far from its center.
The storm is expected to bring heavy rain to Jamaica, Cuba and Hispaniola over the next few days. A tropical storm watch has been issued for Jamaica.
With Sandy, the 2012 Atlantic season becomes the fourth busiest on record, tied with 1969, which also saw 18 named storms.