A Tropical Storm Warning remains in effect for Barbados, Martinique, St. Lucia, St. Vincent and the Grenadines as TS Elsa continues to move quickly in a westward direction.
Tropical storm conditions are expected in portions of the Windward and the southern Leeward Islands within the warning areas on Friday.
In a weather advisory issued at 8am on Thursday, the National Hurricane Centre announced that a Tropical Storm Watch is in effect for Guadeloupe, Grenada and its dependencies.
Tropical storm conditions are possible in the watch areas on Friday.
Interests elsewhere in the Windward Islands, Leeward Islands, the Virgin Islands, Puerto Rico, the Dominican Republic, and Haiti are being urged to monitor the progress of this system. Additional watches and warnings will likely be required later today.
The NHC said: "Interests in Florida should monitor updates to the forecast for this system, but it is too soon to determine what if any impacts could occur there next week given the uncertainty in the long-range forecast."
At 8am AST, the centre of Tropical Storm Elsa was located about 789 miles (1255 km) east-southeast of the Windward Islands. It's moving toward the west near 25 mph (41 km/h).
An even faster motion toward the west-northwest is expected during the next 24 to 36 hours.
On the forecast track, Elsa will pass near or over portions of the Windward Islands or the southern Leeward Islands on Friday, move into the eastern Caribbean Sea late Friday and Friday night, and move near the southern coast of Hispaniola on Saturday.
Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Tropical-storm-force winds extend outward up to 105 miles (165 km) from the centre.
Some strengthening is forecast during the next couple of days.
Elsa is expected to produce rainfall totals of 3 to 6 inches with maximum totals of 8 inches on Friday across the Windward and the southern Leeward Islands, including Barbados. This rain may lead to isolated flash flooding and mudslides.