With the score tied at 46, Morehead State (5-2) used an 8-1 run sparked by two baskets from Posthumus to give the Eagles their largest lead of the game.
The Wolf Pack (3-3) looked to climb back as Deonte Burton hit a 3-pointer to cut the deficit to two. After a Warner layup, Burton hit another triple to make the score 58-57 with 1:04 remaining.
Drew Kelly finished with 13 points and Storey had eight rebounds and four assists for Morehead State.
Burton paced Nevada with a game-high 19 points and was 3 of 6 beyond the arc. Jerry Evans Jr. had 11 points and seven rebounds.