NEW : Arlene weakened , but still packs winds of 40 mph . It was expected to diminish into a tropical depression later Thursday . NEW : A hurricane warning has been lifted along Mexico 's eastern coast . National Hurricane Center : It could cause life - threatening flash flooding and damage .
NEW : Arlene weakened , but still packs winds of 40 mph . NEW : A hurricane warning has been lifted along Mexico 's eastern coast . National Hurricane Center : It could cause life - threatening flash flooding and damage .