Isaac a little weaker and continues to lose organisation as it moves westward.
At this time no tropical storm/hurricane watches or warnings are in effect for Barbados.
At 8 a.m. the centre of Tropical Storm Isaac was located near latitude 14.4 North, longitude 54.1 West. Isaac is moving toward the west near 15 mph (24 km/h), and this general motion is expected to continue through the weekend.
On the current projected track the centre of this system is forecast to pass between 100 and 150 miles (160 to 240 km) north of Barbados early on Thursday morning.
An outer band associated with Isaac will bring some scattered showers and possible isolated thunderstorms to Barbados today. As the system progresses westward into the eastern Caribbean Sea, more organised convection trailing Isaac is expected to affect Barbados, bringing moderate to heavy showers and occasional gusty winds from early Thursday morning and into Friday. Rainfall accumulations of 2-4 inches are possible.
Maximum sustained winds remain near 60 mph (95 km/h) with higher gusts. Gradual weakening is forecast during the next few days. A NOAA hurricane hunter aircraft will soon fly through the centre of Isaac, and will provide a better assessment of the intensity of the tropical storm and the extent of its winds.
Tropical-storm-force winds extend outward up to 105 miles (165 km) from the centre.
The estimated minimum central pressure is 1000 mb (29.53 inches).
A tropical storm warning is in effect for Martinique, Dominica and Guadeloupe, while a tropical storm watch is in effect for Antigua, Montserrat, St Kitts and Nevis, and Saba and St Eustatius.
Sea conditions around Barbados are forecast to deteriorate later today and will continue into Thursday with swells expected to peak near 3.5 metres in open water.
A small-craft warning and a high-surf advisory will be in effect from 6 p.m., today Wednesday 12th September until further notice.
A small-craft warning means in this case that surface winds greater than or equal to 25 knots and seas equal to or greater than 3 metres (10ft) are already affecting or expected to affect the marine area.
A high-surf advisory is issued when breaking wave action poses or is expected to pose a threat to life and property within the surf zone. (BMS/NHC)