At 5 p.m. EDT, the center of Kirk was located about 260 miles (415 kilometers) east of Barbados.
Reconnaissance aircraft has indicated that maximum sustained winds have increased to near 60 mph (95km/h), with tropical storm force winds extending outward up to 115 miles (185 km) to the northeast and 90 miles to the southeast of the centre.
The second installment of Kirk, resurrected Wednesday from the first Kirk's remnants, was continuing to trek west toward the Caribbean at a decent clip, although not quite as fast as earlier in the week.
"This disturbance is likely to redevelop into a tropical cyclone during the next day or two before it moves into an area of highly unfavourable upper-level winds as it approaches the Caribbean Sea", NHC said. "On the forecast track, the center will move over the Lesser Antilles within the Tropical Storm Warning area Thursday night", said the NHC at 11 a.m. on September 26. "Rapid weakening is expected on Friday after Kirk moves over the eastern Caribbean Sea".
Tropical storm warnings are in effect for Barbados, St. Lucia, Dominica, Martinique, and Guadeloupe. Vincent and the Grenadines.
Finally, Post-Tropical Cyclone Leslie, in the central Atlantic, has a 70 percent chance of becoming organized again over the next five days.
A Tropical Storm Watch is issued when Tropical Storm conditions, including winds of 39-73 mph, pose a POSSIBLE threat to a specified coastal area within 48 hours.
Meanwhile, an area of low pressure about 100 miles off North Carolina no longer has a chance of becoming a tropical depression, forecasters said. Because hurricane preparedness activities become hard once winds reach tropical storm force, the Watch is issued 48 hours in advance of the onset of tropical storm force winds. It could regain sub-tropical storm status later this week.
A Hurricane Watch is issued when sustained winds of 74 miles per hour or higher are POSSIBLE within the specified area of the Watch.
Interests elsewhere in the central and northern Lesser Antilles should monitor the progress of Kirk as additional warnings or watches could be issued later today.
Wind: Tropical storm conditions are expected to first reach the warning area by Thursday afternoon, making outside preparations hard or unsafe. These rains may produce life-threatening flash floods and mudslides.