Maya Moore added 14 points for the Lynx (12-5), who have won three of four. Devereaux Peters had 12 points and Lindsay Whalen scored 10. Seimone Augustus, Minnesota's second leading scorer at 17.2 points per game, missed the game due to bursitis in her left knee.
Sue Bird scored 21 points to lead Seattle (7-11) and Jenna O'Hea added 14.
Minnesota led by nine early in the fourth quarter before Seattle pulled within one. However, Whalen and Moore combined to make five free throws in the final 15.3 seconds to help the Lynx get the win.
The Storm return to action Thursday when they face Los Angeles at KeyArena. Start time is 7pm.