NEW : Ike goes from 80-mph winds to 135-mph winds in six hours . Josephine was about 425 miles west of the southernmost Cape Verde Islands off western Africa . Comment: Hanna expected to make U.S. landfall by Friday or Saturday .
NEW : Ike goes from 80-mph winds to 135-mph winds in six hours . Comment: Hanna expected to make U.S. landfall by Friday or Saturday .