https://phys.org/news/2018-09-suomi-npp-satellite-rebirth-tropical.html

Kirk officially regenerated on Sept. 26 at 5 a.m. EDT as a tropical storm. At that time NOAA's National Hurricane Center or NHC noted "two earlier ASCAT scatterometer [instrument] passes between [8 p.m. and 9 p.m. EDT on Sept. 25] 0000-0100Z on Sept 26 indicated that the low-level center had become a little better defined, and that the inner-core wind field had contracted, now with a radius of maximum winds of about 40 nautical miles. Given the continued increase in the amount and organization of the deep convection, advisories have be re-initiated on Tropical Storm Kirk."

A Tropical Storm Warning is in effect for Barbados, St. Lucia, Dominica, Martinique and Guadeloupe. A Tropical Storm Watch is in effect for St. Vincent and the Grenadines.