text: Early on September 10 , an eye began developing within a round central dense overcast over the center , and shortly thereafter Florence attained hurricane status while located about 390 miles ( 630 km ) south of Bermuda .
simplified: Early on September 10 , an eye began developing inside a ring of round thick convection over the center , and shortly thereafter Florence reached hurricane status while located about 390 miles ( 630 km ) south of Bermuda .