Bourne spent the first half of the campaign with Rovers' fellow second-tier side Sheffield United, but has now been recalled and will move to the Lancashire club.
The England Under-21 international, who signed her first professional contract with United in the summer, had been part of our U21 WSL Academy side before stepping up to the first team last season.
The 18-year-old was named in several of the Reds’ matchday squads and made her senior debut in a 6-0 win over Burnley in the FA Cup last April.
Everyone at United would like to wish Tara the best of luck for the forthcoming months with Blackburn.