Kirk is the renamed cousin to Hurricane Florence, which made landfall at Wilmington last week, stalled over the Carolinas and then moved northward before spinning back out to sea.
Farther southeast, Tropical Storm Kirk is moving quickly west across the eastern Atlantic and is expected to pick up speed in the next few days. A faster westward motion across the deep tropical Atlantic Ocean is expected Sunday through Tuesday.Maximum sustained winds are near 40 miles per hour (65 km/h) with higher gusts.
Forecasters say the system is likely to dissipate within a day or two.
Widespread strong thunderstorms with heavy rain will develop in much of the Mississippi River and OH valleys, eventually spreading into parts of the mid-Atlantic and Northeast by late Sunday and into Monday. The storm is moving 3 miles per hour (5 kph), and little motion is expected in the next two days.
"The biggest limiting factors for intensification would be the cyclone's fast motion and possible entrainment of dry air", NHC forecaster Robbie Berg said in a discussion. On Sept. 7, a tropical depression formed in the eastern Atlantic, about 500 miles west of the Cape Verde Islands.
Where is Tropical Storm Kirk now?
Meanwhile, elsewhere in the Atlantic, sub-Tropical Storm Leslie formed in the North Atlantic Ocean and is "forecast to be a short-lived cyclone", said the NHC.
Tropical Depression 11 degenerated into a trough of low pressure around 11 a.m. Sunday.
There are now no coastal watches or warnings in effect. Leslie is not expected to hang around for very long - a new low, one that could become a named storm itself - is forecast to develop north of Leslie and absorb the storm.
That wave's showers and thunderstorms are becoming better organized "and a tropical depression appears to be forming", the center said, putting odds of its formation into at 80 percent over the weekend. They have maximum sustained winds of 25 mph and are about 350 miles east-northeast of the Windward Islands.