Moriah Jefferson finished with 14 points and seven assists for Minnesota (11-19), which ended a three-game skid. Sylvia Fowles had 12 points and 14 rebounds, while Kayla McBride scored 11.
Powers had 10 points and the Lynx shot 65.6% (21 of 32), including 4 of 6 from 3-point range, to take a 49-29 lead at halftime.
The Dream shot 34.4% and made just 2 of 9 from 3-point distance before intermission. But Atlanta outscored Minnesota 40-27 in the final quarter.