On May 28 , the NHC started to monitor the storm again and on 11:00 am EDT ( 1500 UTC ) , they declared the storm to be a tropical cyclone and named it Tropical Depression One . At that time , the storm 's location was about 310 mi ( 500 km ) south of Providence , Rhode Island . Around 11:00 am EDT ( 1500 UTC ) , they designated the system as Tropical Depression One while it was located about 310 mi ( 500 km ) south of Providence , Rhode Island .