Le Mars Community started with the edge, leading 13-12 by the end of the first quarter.
Then the Warriors (6-3) pulled ahead, leading 32-25 at halftime.
"We played a pretty good first quarter, then we kind of dug ourselves into a hole, and for the rest of the game we were trying to play catch up, but were never able to come all the way back," LCS girls' coach Judd Kopperud said.
The Warriors maintained their lead, going into the final quarter 47-38. LCS scored 10 in the last stanza, but Sioux Center added 16 more points to secure their win.
"Sioux Center is a pretty good team. They shot the bell extremely well. They had a couple of kids that were very good shooters and they were on that night," Kopperud said. "We weren't as sharp defensively against Sioux Center as we were the night before, and that made the difference."
For LCS, Mary Kate Eckstaine and Emily Ellefson led scoring with 11 points each and Molly Renken was also in double figures with 10 points for the 'Dogs.
Renken led in rebounds with five boards and Eckstaine grabbed four.
Saturday's loss puts the LCS girls' record at 2-5 overall. The Bulldogs are 2-2 in Lakes Conference play.