The six total touchdowns - all in the first half - were Day's career high. He completed 21 of 30 passes for 280 yards. His touchdown passes were spread among five receivers. Sergio Morancy had four catches for 135 yards, including a 62-yard touchdown.
The Panthers (6-5, 5-3 Missouri Valley) had 593 yards of total offense.
South Dakota (3-8, 2-6) managed only 236 yards of total offense.
Northern Iowa's Matthew Cook made three field goals to establish the school and MVFC record for most career field goals with 67.
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