Seimone Augustus hit a 15-foot jumper with 21.1 seconds left and the Minnesota Lynx held off the Seattle Storm for a 58-55 victory on Sunday and a sweep of the best-of-three Western Conference semifinals.
Maya Moore scored 22 points and Rebekkah Brunson had 15 points and 13 rebounds for Minnesota, which won the WNBA title in 2011 and lost to Indiana in last year's finals.
Minnesota opens the Western Conference finals this week against the winner of the Los Angeles-Phoenix series.
Tina Thompson made a driving layup to put the Storm up 55-54 with 1:20 remaining, but Augustus, who had 10 points, responded with her jumper from the right side. Brunson hit two free throws with 11.6 seconds left for the final margin.
Noelle Quinn missed a driving layup in the final seconds for Seattle.