The Portland Winterhawks scored three third-period goals and got the game-winner in overtime to beat the Edmonton Oil Kings 6-5 Sunday, forcing a deciding Game 7 in the Western Hockey League championship finals.

Keegan Iverson scored the overtime goal at 7:23, sending the series back to Portland. The title will be decided at Veterans Memorial Coliseum on Monday, at 7 p.m.

Portland trailed 3-0 after the first period and 5-2 after the second and at least some of the 11,902 fans at Rexall Place were making plans to head to London, Ontario for the Memorial Cup.

But the Hawks came roaring back, scoring three unanswered goals in the third period. The comeback started like a lot of them do — Portland started winning faceoffs, battling along the boards and limiting Edmonton chances.

The hard work paid off. Mathew Dumba cut the lead to 3-1 when he scored on a 5-on-3 power play at 3:25 in the second. Anton Cederholm cut the lead again with a goal at 13:12.

But as quickly as the Hawks seemed to be clawing back, Edmonton got two goals within 49 seconds when Curtis Lazar scored off a turnover — off Iverson inside Portland’s blue line. Edgars Kulda scored his second goal of the game at 14:42 in the second and Portland’s prospects were fading.

At the start of the third, Portland flipped a switch. Dumba converted on another power play and Keoni Texeira scored his second goal of the playoffs.

Derrick Pouliot sent the game to overtime.