After North Dakota's Carson Shanks made a layup to cut Weber State's lead to one with 3:22 left, the Wildcats reeled off six straight points, five from Senglin, to put the game away.
Neither team shot the ball well with North Dakota holding a slim 41 to 40.4 percent advantage. But the Wildcats got to the line 21 times overall and hit 19. It was just the third time this season Weber State won when trailing in shooting percentage.
Estan Tyler's 12 points led North Dakota (6-13, 2-6). Shanks added 11 points and eight boards.