Dominic Turgeon, Nicolas Petan, Oliver Bjorkstrand and Brendan Leipsic scored in the second for the Winterhawks, who evened the Western Conference final at a game apiece. Alex Schoenborn added another goal in the third period. Petan tacked on two assists for a three-point outing and Derrick Pouliot had three assists.
Corbin Boes earned the win for Portland after stopping all 15 shots he faced in 38 minutes of relief. Boes replaced starter Brendan Burke, who allowed three goals on 12 shots.
Madison Bowey, Riley Stadel and Nick Merkley supplied the scoring for the Rockets, who blew leads of 2-0 and 3-1.
Kelowna's Jordon Cooke turned away 48-of-53 shots in defeat.