 The depression continued to the northeast , and re @-@ strengthened into Tropical Storm Dean early on August 27 while located 580 miles ( 930 km ) south of Halifax , Nova Scotia . The convection became better organized , and Dean steadily strengthened as it tracked northeastward . A ship near the center of Dean confirmed the storm re @-@ developed . The convection near the center greatly organized , and an eye feature began to develop . Remaining over warm waters , Dean continued to strengthen and reached peak winds of 70 mph ( 110 km / h ) late on August 27 while located about 465 miles ( 750 km ) southwest of Cape Race , Newfoundland . The eye feature failed to develop further , and after maintaining its peak intensity for 12 hours Dean weakened over progressively cooler waters . The convection quickly diminished , and on August 28 Dean became extratropical while located 145 miles ( 235 km ) east @-@ southeast of Cape Race , Newfoundland . The extratropical storm continued northeastward until being absorbed by a frontal low on August 29 . 
