Tracking the Tropics: Leslie joins Kirk in the tropics

A sign commemorating the rebuilding of the town of Nichols which was flooded two years earlier from Hurricane Matthew stands in floodwaters in the aftermath of Hurricane Florence in Nichols S.C. Friday Sept. 21 2018. Virtually the entire town is onc

Tropical disturbances form, strengthen in the Atlantic as busy September ends

That was the scenario Sunday morning as forecasters at the National Hurricane Center watched four tropical weather systems in the Atlantic basin - a pair of minimal tropical storms, a dissipating tropical depression and another disturbance that could threaten the flood-weary Carolinas. There are no coastal watches or warnings in effect from that storm, which packs top sustained winds of 40 miles per hour. Strong upper-level winds are expected to diminish by Sunday or Monday, which could allow for some slow development of this system while it moves westward and then northwestward over the southwestern Atlantic Ocean.

Tropical Storm Kirk formed south of the Cabo Verde islands on Saturday.

Upper-level winds are expected to increase, limiting chances for additional development while the system moves near the southeastern US coast. "The global models show a notable increase in westerly shear when Kirk reaches the eastern Caribbean Sea in about 4 days, and that should cause weakening and possibly even dissipation by the end of the forecast period". The depression had been approaching the Lesser Antilles but thanks to hostile winds only a cyclonic wisp of clouds remained. After that time, with the development of the new low to the north, Leslie will likely move east until it becomes absorbed. Tropical-storm-force winds extend outward from the center up to 35 miles to the northwest. It gives that disturbance a 50 percent chance of developing in the next five days.

The other, located about 1,000 miles west-southwest of the Azores, has a 60 percent chance of formation.

Leslie, which has 40 mph winds, has changed little in strength over the past 24 hours, according to the NHC in its 5 a.m. update.

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